project report for kotre basantpur pachmo ocp (5.0mty

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Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL

SeamThickness Range (m.)

GeneralisedMin. Max. Remarks

Name Range (m)(Bh No.) (Bh No.)

IITOP 0.71 7.63 1.50-3.0 Faulted-2bhs

(CMB-33) (CMB-72)Parting 0.43 5.17 1.50-3.50

(CMB-73) (CMPM-24)II BOT 0.97 5.20 1.50-3.0 Faulted-2bhs

(CMPM-13) (CMPM-30)ll(T+B) 1.07 6.41 2.00-4.00

(CMPM-21) (CMPM-17)

Parting 11.80 43.63 25.0-35.0 Parting taken with floor of 11Bottom seam

(CMPM-38) (CMPM-21)

I 0.15 6.57 0.5-3.0 Carbshale-6bhs, Faulted-1 bh,Not.Dev-1 bh

(CMB-21) ·(NCWBK-37)

Parting _, 20.70 104.01 30-50

(CMB-94) (NCWBK-37)

LOCAL 0.10 3.78 1.5-2.5 Faulted-1bh, Not Dev-1bh(CMB-94) (CMB-69)

-· --Parting 40.27 56.34 40-50

(CMB-64) (NCWBK-37)

SEAM 'O'- --- --0.40 3.65 1.0-3.0

-· - -

(CMB-85) (CMB-70)

4.3.4 Structural Setting:Kotre-Basantpur block is characterized by moderate structure. Kotre-Basantpur has 9 faults

with throw varying from 5m-150m. Out of these faults F1c, F2 and F14 are major faults. Besides

these, there are minor slips of less than 3-4m also. These faults have been picked up on the

basis of direct intersections in the boreholes. Such faults are 6 in number having throw of 3-4 m

& they become zero over a short distance. These minor faults have been assumed to affect thenext underlying & overlying seams only. Since, these minor slips have been picked in Seam II

to IV only, their surface trace have not been shown on the geological map like the other

prominent faults (throw more than Sm) of the block.All these faults are normal gravity faults. These faults have been interpreted to belong to at

least three different generation. Faults F1c, F3c, F6c belong to first generation. All these faults

trend WNW-ESE to NW-ESE having a southerly throw. Fault F2, F5, F8 and F9 have been

Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL,.

shown to belong to second generation. Strike of these faults vary widely. Faults F?c and Kedia

faults belong to 3rd generation. Fault F?c bifurcates from Kedia near CMB-40 as a result throw

of Kedia fault in the eastern part has been considerably reduced.

The Pachmo block on the other hand is characterized by a fairly simple structure with only· 7

faults of throw varying from 5m to 300m. Out of these faults 4 faults are seen to continue into

the Pachmo Block from the adjoining Kotre-Basantpur block as stated below.

a) F1 of Pachmo Block is a continuation of F1 of Basantpur-Kotre block.

b) F3 of Pachmo Block is a continuation of F3 of Basantpur-Kotre block

c) F5 of Pachmo Block is a continuation of F5 of Basantpur-Kotre block

d) h of Pachmo Block is a continuation of F1 of Basantpur-Kotre block.

Fault nos. F2, F4 and F5 of Pachmo block do not extend into the Basantpur-Kotre. All the 7

faults deciphered in Pachmo block broadly have an E-W extension with southerly throw except

F2 which has a northerly throw. Fault F3c forms the southern boundary of Pachmo Block and

brings the Lower/Middle Barakar in juxtaposition with the Upper Barakar of Loiyo block. It has

been intersected in CMPM-10. The throw of fault F1 c is seen to increase to 130m in the east.

The Basantpur-Kotre block is the first block explored in detail in the northern limb of the

northern syncline of West Bokaro Coalfield. Since the area is practically devoid of exposures

due to the cover of alluvium/detrital mantle, the geological structure of the block is mainly

based on the subsurface data.

Floor contours drawn for the different seams show that there is a wide variation in the attitude

of the beds. The variation in the attitude of the beds have been brought by oblique faults.

In the Western part of the block, in Sector-C strike of the bed is almost E-W. This has been

deciphered on the basis of the borehole data of CMG-77, 76, 15 and NCWBK-34. The dip of

the strata is towards South and gradient in Sector varies from 1 in 4 to 1 in 6. However, ;,1 small

patch steeper gradient have also been observed.

In a major part of the block excepting Sector-G and eastern part of Sector-D, strike of the bed

is mostly NE-SW. The strata dip towards SW and the amount of dip varies from 8 to 12 dig. Insector A however steeper dip of 15 to 20 deg. Have been interpreted and in sector B and C in

the updip side flatter dip of 5 deg to 8 deg have been observed.

in the Southern part of the block, between Kedia fault and fault F5, based on the data of CMB-

60, 40 and NCWBK-37, reversal of dip due to closure of the basin has been interpreted. In the

south eastern part between borehole WBKB-5 and NCWBK-37, fault F5 has been interpreted

as passing through the synclinal axis of northern syncline of West Bokaro Basin.

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Job No. 3417145 23

'1«i~~tiliiMI 31Rl4>1'8 :PROJECT OFFICER

CtmR ~"8;t~t1om m ~.ft ·.Kotre Basantpur Pachmo Coal lne

lftolfto~o. ~C.C.L., Ranchi

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4.3.5 Dip and Strike:The strike of the strata of Kotre-Basantpur block is broadly E-W with southerly dip of about 8-

180 (1 in 3 to 1 in 7) in major part of the property. However, the dip near the southern part of

the block is northerly.There is a prominent swing in the strike in north-western part of the block in vicinity of NCWBK- -

34, CMB-13, 15, 22, 23, 76, 78, 83, 87, 89, 92, 94 etc. depicting a major roll of the strata.

Besides this, there are local swings in the strike which is mainly due to increase/decrease in

the intervening partings between the coal seams .

The gradient of the strata in major part of the block is generally 1 in 4 to 1 in 6 (9-14 °). The

steeper gradient of 1 in 3_ (18°) is noticed in the vicinity of CMB-25, 35, 60 & 79.

In the eastern part of Kotre-Basantpur falls Pachmo block. This block exhibits gentle warp

having almost E-W strike in the north-west. Towards the center the strike swings to a NW-SE

trend which finally once again swing to an E-W trend in the eastern corner of the block beyond

Baghraiya nala.The dip in Pachmo Block generally ranges from 8° to 25° (1 in 2 to 1 in 7). However the dip in

major part of the block varies from 10° to 15° (1 in 4 to 1 in 6). Steep gradient of 14° to 25° (1

in 2 to 1 in 4) is observed in northern, eastern and south-eastern parts near CMB-45, 72, 73,

CMPM-31, 32, 27, 2, 33, 21, 17, 9, 11, 36, 13 and 41. Similar steepness is also observed in the

vicinity of CMPM-4, 7 and 10 .

Faults and their characteristic features:

Table: 4.11 Fault description of Kotre-Basantpur and Pachmo Combined Block.

4.3.6

--Fault Extent of the Strike Dip Amount of throw EvidencesNo fault direction

F1c Marks partly In Kotre- Southerly in 100-190m in Kotre- 1.lncrop of Seam O in justaposition ofnorthern block Basantpur it is both the Basantpur a: ,d 100- Seam VAboundary of curvilinear which blocks 300m as tentatively 2.Sludge of Seam-V coalPachmo Block trends ENE-WSW. assessed in Pachmo 3. Based on floor contour plans.and continues in In Pachmo Block, Block. 3. Omission of lower Barakar seams andthe adjoining it also shows Karharbari formation in CMB-20, CMB-53,Basantpur-Kotre Curvilinear fault CMB-55 and the metamorphic wasand Lalgarh with more or less encountered at a shallow depth of 23.44m,blocks WNW-ESE trend 9.45m and 21.35m respectively in each

borehole.i.e. in Kotre-BasantpurIn Pachmo due to Occurrence ofmetamorphics in juxtaposition with LowerBarakar-Karharbaries.

F2kb Marks the Almost NW-SE Westerly 30-120m 1. Occurrence of Barren Measures inwestern block juxtaposition with lower Barakars in theboundary and north.abuts on either 2. Complete omission of Seam XIII to XIAsides with fault in CMB-57.F1 and F14 ; /1 3. Omission of Seam XIIIJo IXA..in CMB-79.

Job No. 3417145 24 #~~\1\ '11'<<4'"' ~P6~ .....PROJECT' - ~~I

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F5µ Runs in south Slightly curvilinear I Southerly 0-20m The throw I. Omission of Seam Vin CML-40.eastern part fault with roughly becomes zero near ii. Omission of IIIA an~ltiSfT11n.llGllit::r+:f\almost parallel to I CMPM-7 which'-=:=~~~~~'======k=~~~====~~~~=t!Re'i!~~Fft€ER ..

Job No. 3417145 25 ~ - · ~ .m~ lfttrr ~· Kotre Basantpur Pach mo Coal M\ne

lftolfto~o. xhf) 'C.C.L., Ranchi


Fault Extent of the Strike Dip Amount of throw EvidencesNo fault direction

F2p Runs near the Curvilinear fault Northerly 100m Based on stratum contours. Occurrence ofnorth western having roughly E- younger seams in CMB-72 compared withblock boundary W trend CMB-73and abuts withfault F1 on eithersides

F3c It is a ENE-WSW in Southerly in In Kotre-Basantpur In Kotre-Basantpur based on 1.Seam VIIBcontinuation in Kotre-Basantpur Pachmo and block it's 40m-50m to IV omitted in CMB-37.the Basantpur- Block. Westerly to In Pachmo Block it is 2.Seam IV to II faulted in CMB-30Kotre block and In Pachmo Block Southerly in 20-120m The 3. Encountered al roof of Seam V in CMB-Pachmo mock Slightly cwvilinear Kotro minimum throw of 20 50and marks the fault having almost Basantpur i.e. m is noticed near 4.Reduction in parting between Seam 111,11southern block NW-SE trend in westerly in CMPM-10 which in CMB-50boundary. It runs the west which Nor!~ West increases to 120m 5.0mission of Seam IV in CMB-80into Lalgarh becomes almost . and Southerly towards.east due toblock towards E-W in the east. In in the South abutment of faults of 6. Omission of lower part of Seam VA in

east. Runs in Kotre-Basantpur it and South Loiyo property. 0- CMB-96.western and is also a East. 75m O meter throw is In Pachmo block owing to stratum contourssouthern part of curvilinear fault near CMB-76 which and omission of Seam IV and V in CMPM-Kotre Basantpur with almost NW- increases to around 10and is almost SE trend in the 40m near CMB-60parallel to Fault North West which and becomes aboutF2 in the West takes a turn to 75m near CMB-100.and fault F14 in almostE-W trend Its throw decreasesthe South and in the South and to about 40m inSouth East. It South East. South East of Kotrecontinues in Basantpur due toadjoining abutment of FaultPachmo Block. F8.

F4kb Runs almost Slightly curvilinear North- 0-60m Maximum 1.0mission of lower part of Seam II andparallel to fault . fault with almost Easterly throw of 60m is near also missing of Seam I and its parting withF3. It abuts with NW-SE in the CMB-63 which underlying seam in CMB-89

---- . fau It F1- in the North westwhich gradually decreases 2.0mission of Seam V,VA,VINII and Vl!ANorth becomes more or to 3Clm near CMB- in CMB-91

less E-W near 89. Throw of thisCMB-38 fault has suddenly

decreased to 1 Omsouth of CMB-66 due

4 to the abutment offault F5. This throwof 1 Om becomeszero metre nearCMB-39

F4µ Runs near the Slightly curvilinear Southerly 60m(approx.) Occurrence of strata below seam-I inI northern block fault with almost CMPM-28 and 34 in juxtapositio'n with

boundary in the E-W trend. It abuts seam-Ill in CMPM-25

I region of CMPM-1 on either sides28 and 34.lt with fault F1

I .. ~,.._ 'V~Jh f ! ~~ Iabuts v , au ,F1

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F5kb Runs more orless parallel tofault F4 andabuts on either

' sides with faultF1 or F4.

Slightly curvilinear Westerlywith almost NW-SE trend

30-50m Throw of Based on stratum contours.30m in the northgradually increasesto 50m near CMB-66

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FaultNo

Extent of thefault

Amount of throw

fault F3.ltcontinues in theadjoining Lalgarhblock.

Strike

E-W trend.

Dipdirection

gradually increases20m towards east.

Evidences

CMPM-39.iii. Omission of seam II Top and II Bottom inCMPM41.iv. Omission of seam IV in CMPM 43.

F6c It continues fromadjoiningBasantpur Kotrein Pachmo blockand runs in theregion of CMPM-22, 2, 24, 18 and20 Runs in northeastern part andis roughly parallelto fault F4 inKotre Basantpur.It continues inPachmo block inEast and abutswith fault F 1 inthe North.

E-Wto NW-SE Southerly toSouthWesterly

60-90m in KotreBasantpur block.60mthrow graduallyincreases to 90mNorth of CMB-41.In Pachrno Block 0-60m The zero throwis near CMPM-2 and20 which graduallyincreases to about60m near thewestern blockboundary of PachmoBlock.

In Kotre-Basantpur 1.0mission of Seam Illin CMB-61.2. Omission of Seam VIIIB in CMB-623. Omission of Seam IX to VIIIB in WBKB-15.4. Omission of seam VII Top and VIIBottom in CMB-59.5. Omission of Seam IV in CMB-75.based on stratum contours

F?c Runs in northernpart almostparallel to faultF6. ltis acontinuation fromthe adjoiningBasantpur Kotreblock fromPachmo blockand abuts withfault F1 nearCMPM25

Almost E-W toNW-SE

Westerly toSouthwesterly

20-40 m. The throwof the fault nearwestern boundary ofPachmo block is40m which gradualiydecreases to 20m inthe cost of Paehrno40-?0m throw of ?Omgradually decreaseseastward to 40mnear North of CMB-42.

In Kotre- Basantpur following evidencesmark this fault.1. Encountered in CMB-77 at 177m.2.Strata between Barren Measure andSeam VIII missing in CMB-793. Encountered in CMB-77. Strata aboveseam I missing. Barren Measureencountered4. Occurrence of Barren Measure againstLower Barakar.Based on stratum contours

F8kb Runs in SouthEastern partandabuts on eithersides with faultsF3 and F14.It is a minorslip&runs parallelto faults F2 andF3 in the NorthWestern part.

Almost NW-SE

Almost NW-SE

South~-- _We_sterly_

Southwesterly

35-40m

0-4m Throw of thisfault decreases tozero metre on eithersides near CMB-24&88

1. Seam VII Top to VII Bottom missing inCMB-24.2.Seam II and Ill missing in CMB-59Based on stratum contours.

1.0mission of Seam VIIIA to VI in CMB-352. Omission of VII Top and VII Bottom inCMB-62.3. Omission of Seam IV in CMB-61 andlower part of Seam IV in CMb-77.

F10kb Runs in the Almost-NW-SEnorthern partalmost parallel tofault F3

SouthWesterly

0-4m Throwdecreases to zero

1. Seam VII Top, VII Bottom & VI missing inCMB-63.

metre on either sides Omission of Seam II in CMB-13.near CMB-15 and59.

F11 kl> Runs parallel to Almost NW-SE• fault F4 and is

ocated in NorthWestern part ofthe property.

NorthEasterly

0-4m.Throw 1.Encountered in CMB-46 Omission ofdecreases to zero Basal seamsmeter on either sides 2.Encountered below seam I in CMB-49near NCWBK-34 andCMB-27

3. Encountered in CMB-68.Borehole had tobe abandoned due to jamming of rods.Omission of upper part of seam V in CMB-78.

F 12kb Runs parallel tofault F4

Almost NW-SE Northeasterly

0-4m Throw Omission of upper part of Seam V in CMB-decreases to zerg,. 30. ..:: .:. ....... ,--.~<11IXI

Job No. 3417145 26


Fault Extent of the Strike Dip Amount of throw EvidencesNo fault direction

metre on eithersides.

F13Ks Runs parallel to Almost NW-SE South- 0-4m Throw Omission of upper part of Seam V in CMB-fault F5 near Westerly decreases on either 30.CMB-37. sides to zero metre.

Kedia E-W Northerly +100m 1. Presence of Seam X and BarrenFault Measure in CMK-119 & CMK-135 against

kb Lower strata of Kedia Block.2. Absence of rock exposure in ChutuaNala.

F15kb This is a minor Almost NW-SE South- 0-4m Throw Omission of upper part of Seam V in cmB-slip and runs Westerly decreases on either 80.almost parallel to sides to zero metersfault F5 in the near CMB-47 andnorthern part of CMB-66the property.

Note: Fe: Common fault lying in Kotre-Basantpur and Pachmo block.FKs: Fault lying in Kotre-Basantpur,FP: Fault lying in Pachmo

4.3.7 Presence of dyke, sills (igneous intrusives), etc.:

Surface mapping as well as borehole records of the Pachmo and Kotre-Basantpur do not

indicate the existence of intrusives.

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4.4 DESCRIPTION OF COAL SEAMS:

4.4.1 Important Coal Seams:

The Pachmo & Kotre-Basantpur blocks are situated on the northern limb of the northern

syncline of the West Bokaro Coalfield. Both these blocks are divided by Chutua nala & fall as

Kotre-Basantpur first and Pachmo block as second when one travels from West to East in this

part of the coalfield.

The Kotre-Basantpur & Pachmo blocks have complete sequence of coal seams occurrii ,g in

Barakar & Karharbari formations. The 13 potential coal seams of the blocks are Seam 'Local'

below seam I, Seam II, Seam Ill, Seam IV, Seam V. Seam VA, Seam VINII. Seam VIII, Seam

IX, Seam X, Seam XI, Seam XII & Seam XIII. Among these, the most potential from the

thickness & quality point of view are Seam IV, V, VA & VI/VII. The intervening parting between

these seams is also less as compared to the other thick seams of the block. Hence, these

seams are lucrative from the quarriabiiity point of view aiso. Among the younger potentialseams of the block seam X & XI are around 3.0-6.0 m thick while Seam VIII, IX, XII & XIII arethin having around 1.5-3.0 m thickness.

Seam I & II are inferior but do show workability from thickness point of view in Pachmo block. In

the same block these seams are inferior from quality point of view as are they in Kotre-

Basantpur with added disadvantage of being erratic. In Pachmo, the including bandtffi~~<t>l.fi~TOFFICE

Job No. 3417145 27 _\ \1 a~ tt'ifl« ~ ~~\\-, p chmo Co !I [Mine~ Kotre Basantpur a ~

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these seams goes as high as 48%. Washing these coals from here does not appear to be a

profitable proposition. Hence, their grading has been done on the basis of UHV.

There is a local seam occurring between Seam 1 & 'O' seam which has thickened in Kotre

Basantpur block having consistent thickness of normally 2m & is potential for underground

exploitation.In Karharbari formation, only one coal seam i.e. 'O' seam occurs in both the blocks like the

other blocks. Seam O is slightly superior to Seam I to Ill from quality point of view but is erratic

in thickness and extent. So, does not appear to be potential for mining.

4,4.2 Description of Coal Seams of Pachmo and Basantpur-Kotre CombinedThe shaly coals present within the coal seams have been considered as an economic

constituent of the seam. This is mainly on account of the fact that coals on washing will yield

cleans of around 17% ash and the shaly coals will yield middlings which are in great demand

for the power houses. While deciphering the dirt bands within the coal seams, the bands having

ash between 50% to 75% have been grouped as combustible and those with more than 75%

ash as non-combustible bands, viz. grey shale, carbonaceous sandy shales, sandstones or any

other extraneous bands present within the seam.The coals of blocks are strongly caking in nature. There is a wide variation in the grade of coal

seams which ranges from washery grade I to ungraded. Seam VIN!! being the thickest seam

(normally 6 to 7m) of the block has an overall grade of W 11/111. The next important seam from

quality point of view is Seam VA (4 to Sm thick) with an average grade of W-11/111. The seams

IV, V, VIII, IX, X, and XI have overall grade of W-IV seam Ill is WG-IV to ungraded. Seam I and

II are inferior seams being high in ash% and have been graded on the basis of UHV values.

Seam O is also WG-IV to marginally ungraded.There are altogether 30 coaly horizons in the Parakar & l~arharbari formation. Only one, Seam

i.e. Seam 0, belongs to Karharbari formation. The 29 other seams belong to the Barakar. The

important seams in the combined blocks are Seam IV, V, VA. VINII. These are thick seams &

offer quarriable potentiality.Seam VINII of the block is the thickest seam having 3.05-9.66 m thickness which is followed by

Seam V (2.19-9.65m thick), VA (1.12-7.40m) & IV (0.25-8.39m). These seams are lucrative

from quality point of view as they have average grade of WI & WIV. The other important seams

of the block from thickness point of view are Seam X (0.45-6.63m) & XI (2.48-4.52rr,).

Seam VINII & VA are the most important seams of the block from thickness & quality point of

view. The average grade is SG-11 to WG-IV for seam VI/VII comb. & WG-1 to WG-IV for Seam

VA. While seam IV has average grade WG-11 to WG-IV. Seam II, Ill & XIII are inferior being

ungraded. Among the other seams of the block Seam V, VIII, IX, X, xr-& XII have an averageJob No. 3417145 28 ~~,"b ~~~l1Dl3'~«t>ltft-;..j\' PROJECT OFFICER

~ ci~~ ~~ lfit~ m';fKotre Basantpur Pachmo cce. :Altli

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grade of WG Ill to Ungraded. The Local Seam occurring below Seam I in Kotre-Basantpur is

lucrative from quality point of view, being WII/WIII on an average. Its thickness is generally 1.5

to 2.5m & is suitable for underground exploitation. But this seam does not incrop in Kotre

Basantpur except in a very small patch located in the extreme North Western corner of the

block. Seam XIA, XA, IXA, VIIC, VIIB, VIIA are thin and inferior, their reserves aren't calculated.

Seams IIA to I have been indicated to fall in non-coking coal category owing to high ash

content but on careful scrutiny of quality data they appear to fall as coking coal. This is justified

by following points.

1. · C.V. on dmmf basis which gets a range of 8700-8800

2. C.I. having a range from 18-22

3. C.T. of range F/G.

LTGK (C.T.) determines the coking propensity of coal. This test is a more reliable indication of

coking property.

The analysis results for coking properties are tabulated below.

Table No: 4.12


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••••••Seam Analysis CV CJ. C.T. S.I. Grade

EX- 6045-6450 25 F-G3 2-4 Yz B-EBAND (8670-8690)IIA BCS - - - - E-F

INBAND - - - - E-GINBAND - - - - SII-UG

EX- 5570 F 2 B-DBAND -IITOP BCS D-E- - - -

INBAND . - - - - D-E. EX-BAND 4090 - - - 8-D

II BOTBCS - - - - D-F

INBAND - - - - D-GEX- 19 FIG 1 Yz -6 C-0BAND -

II I

COMB BCS - - - - D-G

r IlNB.ANO r - - - - 0-Fr r r r

EX- 14 E/F 1 Yz B-0BAND -I BCS F-G- - - -

INBAND - - - - F-UGI

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Job No. 3417145 29

~ qA>il ""' 1 a,ft10>1fl~i) PROJECT OFFICE

7 ct,)~~ "~1 tiTfln ~ '"'1Kotre ~as:;;r Pach mo Co· I ine

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4.4.2.1 Details of Merger of Coal Seams:In Pachmo Block, as also in West Bokaro Coalfield as a whole, there is a wide fluctuation in the

parting between various seams. When parting becomes less than 1 meter the seams are

considered as 'Merged' or 'Combined'. This has been seen in the case of Seams VA. VI/VII

and Ii Top and II Bot in Pachmo block.

(i) Merger of Seams VA and VINli, Pachmo Block.These two seams are distinct coaly horizons in major part of the block where the parting is

seen to range between 1.04 to 3.00 m. However, there are two patches within the block where/

the parting has reduced to less than 1m and VA and VINII seams have been considered as a

composite horizon called VANINII. These patches are:-a) In the western part of the block in boreholes CMB -48, 67 and 71 and CMPM-23, 29 and 30.

b) In the eastern part of the block in borehole Nos. CMPM-15, 20, 35, 39 and 41.

(ii) Merger of Seams II Top and II Bottom, Pachmo Block

Seams II Top and II Bottom are also separate coaly horizons in a major part of the block.

However, in the north eastern and eastern flanks of the block, the two seams merge into a

composite coal horizon as seen in borehole Nos. WBKB-6, CMPM-17, 21, 38 and 39 where the

parting has reduced to less than 1 m.

4.4.2.2 Roof and floor characteristics:

Table: 4.13 Lithological Break Up of Roof & Floor of Seams

Seam No. General Roof Lithology General Floor Lithology

XIA Carbsh (66%), Greysh (34%)Alt. Shale/Sandstone (33%), shale (33%),Carbsh (34%)

XI Sandysh (50%), Carbsh (33%), shale (17%) Sandstone (50%), Shale (33%), Carbsh (17%)

Alt. shale/sandstone (34%), sandstone Carbshale (42%), alternate shale & sandstoneX (25%), carbshale (25%), shale (8%), (25%), shale (25%) sandstone (8%)

sandyshale (8%)

IXAShale/sandstone (33%), carbshale (33%), 1 Alternate shale & sandstone (50%), sandstoneshale (17%), sandstone (17%) (33%), shale (17%)

IXSandstone (46%), shale (27%), carbshale Carbshale (37%), shale (27%), alternate shale(18%), sandyshale (9%) & sandstone (18%), sandstone (18%)

Shale (36%), sandstone (21%), carbshale Shale (37%), alternate shale & sandstoneVIIIC (21%), alt. shale/sandstone (15%), (18%), sandstone (18%)

sandyshale (7%) ------Alternate shale/sandstone (34%), sandy Alternate shale /sandstone (34%), sandyshale

VIIIB shale (18%), sandstone (18%), carbshale (30%), sandstone (30%), carbshale (6%)(18%), greyshale (12%)

VIIIA Alternate shale/sandstone (46%), carbshale Greyshale (55%), alternate shale & sandstone(18%), greyshale (18%), sandyshale (9%), (36%), sandstone (9%) ... ;-:,.,; ~ -:.u 1..- •. ,.

Job No. 3417145 30


Seam No. General Roof Lithology General Floor Lithologysandstone (9%)Sandstone (30%), carbshale (25%), Sandy shale (40%), carbshale (30%),

VIII greyshale (25%), sandyshale (10%), sandstone (15%), alternate shale & sandstonealternate shale & sandstone ( 10%) (15%)

VIICCarbshale (33%), greyshale (25%), Greyshale (50%), alternate shale & sandstonesandyshale (17%) & sandstone (8%) (34%), carbshale (8%), sandstone (8%)

VIIB Carbshale (67%), alternate shale/sandstone Carbshale (33%), greyshale (33%), sandstone(33%) (34%)Carbshale (46%), greyshale (31%), Greyshale (46%), carbshale (38%), alternate

VIIA sandyshale (8%), alternate shale/sandstone shale & sandstone (8%), sandstone (8%)(15%)VANI/VII Alternate shale/sandstone (40%), carbshale Carbshale (30%), greyshale (30%), alternate

Comb (30%), greyshale (30%) shale & sandstone (20%), sandyshale (20%)

VINII Comb Greyshale(46%) ,carbshale(24% ) ,sandyshal Carbshale (100%)e (18%),sandstone(12% ·Greyshale (38%), sandstone (26%), carbshale

VA Carbshale (95%), grey shale (5%) (16%), sandyshale (10%), alternate shale &sandstone (10%)

Sandstone (59%), greyshale (30%), Greyshale (35%), sandstone (22%), sandyV carbshale (11%) shale (19%), alternate shale & sandstone

(16%), carbshale (8%)Sandstone (38%), carbshale (24%), Sandstone (35%), alternate shale/sandstone

IV alternate shale & sandstone (21 %), shale (24%), shale (24%), carbshale (10%),(17%) sandyshale (7%)Sandstone (62%};alternate shale & Greyshale (48%), carbshale (28%), alternate

111 sandstone (17%), carbshale (14%), shale & sandstone (10%), sandyshale (10%},greyshale (7%) sandstone (4%)Carbshale (39%), sandstone (39%), Greyshale (62%), sandyshale (17%),

IIA greyshale (17%), alternate shale & carbshale (11%), alternate shale & sandstonesandstone (5%) .. (5%), sandstone (5%) I

II Top+Bot Alternate shale/sandstone (50%), carbshale Carbshale (66%), alternate shale & sandstoneComb (50%) (17%), sandstone (17%)

IITOP Sant!stone (69%), greyshale (23%), Greyshale (47%), sandstone (23%), alternatecarbshale (8%) shale & sandstone (17%), sandstone (17%)

Carbshale (54%), alternate shale/sandstone Alternate shale & sandstone (38%), greyshaleii BOT (31%), sandstone (15%) (23%), sandyshale (15%), sandstone (15%),

carbshale (9%)

l Sandstone (54%), carbshale (31%), Carbshale (46%), greyshale (38%),r -'"- mate shale & sandstone i1 5°A' sandyshafe (8%), sandstone (8%) Idllt:I Id e I Qlt: .:,Q I .:>l I IC\ I 0/

'O' Granitized sandstone Alternate shale & sandstone (33%), greyshale(33%), sandyshale (17%), sandstone (17%)

"

I• I

4.4.2.3 Surface burning

The surface burning due to spontaneous combustion of coal has not been noticed in Pachmo

and Kotre-Basantpur block during surface mapping as well as in borehole cores. q~4)ut-ll 31~ct,1.ft (~~ROJECI OFFICER

Job No. 3417145 31 ~ l~ij~~) qi)~ ml~, ~ Kotre Basantpur Pachm~ Coal me

~o~o~o. ~Tt:ft ' ·C.C.L.. Rar."r,i

• Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL

4.4.2.4 Details of dirt band

Table: 4.14 Details Of dirt bands of seams in Kotre-Basantpur Pachmo Combined Block:

Combustible dirt bands Non-combustible dirt bandsCoal Seam Cumulative % of dirt bands to Cumulative % of dirt bands to

No. thickness seam thickness No. thickness seam thicknessXIII 0-1 0-0.16 0-6.5 - - -

XII - - - - - -

XIA - - - - - -

XI 0-4 0-0.60 0-14.9 - - -XA - - - - - -

X 0-2 0-0.94 0-18.5 - - -IXA - - - - - -

IX 0-3 0-0.83 0-29.1 - - -

VIIIC 0-1 0.20-0.25 17.8-27.5 - - -

VIIIB 0-1 0.05-0.36 4.6-19.4 - - -

VIIIA 0-1 0.18-0.37 13.7-25.65 - - -

VIII 2-3 0.37-1.37 8.1-24.3 - - -

VIIC - - - - - -

VIIB - - - - - -

VIIA - - - - - -

VINII COMB 0-4 0-1.20 0-17.4 0-1 0-0.25 0-3.30

VANINII I

1-7 0.27-3.05 2.6-21.1 - - -COMB

VA 0-2 0-0.57 0-11.1 0-1 0-0.12 0-2.7

V 0-3 0-0.86 0-13.1 0-2 0-0.60 0-8.3--- '

IV 0-4 0-1.83 0-29.3 0-1 0-0.26 0-5.7

IIIA - - - - - -

Ill 0-2 0-0.69 0-12.0 0-1 0-0.22 0-6.8

!IA 1-5 0.11-0.66 2.4-22.0 - - -

II 0-7 0-1.67 0-35.7 0-2 0-1.03 0-13.3

IITOP 2-3 0.18-0.29 5.4-13.2 - - -

11 BOT 1-8 0.05-1.54 5.1-29.6 - - -

11 TOP+BOT 0-1 0.20-0.28 3.1-8.4 - - -MERGED

I 1-6 0.17-1.09 4.4-28.5 - - -

Local below 0-2 0-0.40 0-26.3 0-1 0-0.05 0-?-.0seam I

4.4.2.5 Quality parameters

4.4.2.5.1 Proximate AnalysisqA4)uFH~PROJECT OFFICER

Job No. 3417145 32

Table 4.15 Proximate Analysis


Coal Type of Proximate Analysis UVM% CV C.I. C.T. S.I. GradeSeams Analysis M% Ash% VM%Ex-Band 1.0-2.0 20.7-31.7 24 32.3 5460 - E 2 WI-WIV

XIIIIn-band 1.3-1.7 29.0-37.4 22.9 29.9 WIV-UG- - - -Ex-Band 1.1-1.7 22.8-28.0 24.3-25.1 30.0-31.2 5760 - G - WII-WIII

XIIBCS 1.0-1.3 24.2-43.2 20.3-24.8 28.4-31.2 WIII-UG- - - -

Ex-Band 1.1-1.6 20.8-26.8 24.6-24.7 29.7-31.8 5310 - F/G 3-3 Yz WI-WIiiXIA BCS 1.2-1.5 40.8-48.8 - - - - - - F-G

INBAND 1.0-1.6 26.8-48.8 20.0-24.6 26.8-31.8 - - - - WIII-WIVEx-Band 0.9-2.3 21.0-26.8 23.0-23.8 28.4-32.4 - 14-18 D-G 1-3 WI-WIV

XI BCS 1.5-1.9 29.9-33.4 21.6-21.7 - - - - - WIVINBAND 0.9-1.9 27.9-38.9 20.6-22.8 28.0-29.2 - - - - WIII-UGEx-Band 1.0-1.4 23.9-48.6 - - - - - - WII-UGXA lnband 1.0-1.3 27.2-51.2 WIII-UG- - - - - -

Ex-band 0.07-1.9 19.2-28.2 22.6-24.5 27.7-31.0 5950 16 E/F-G 1 Yz -3 Wl-WIVYzX BCS 1.2 24.3-29.4 22.7 WIii- - - - -

lnband 1.2-2.0 20.8-46.2 22.0-24.1 29.0 - - - - Wl-UG- Ex-band 0.7-1.4 16.7-23.6 22.3-25.0 27.2-29.6 E/F SGII-WGII- - -

IXA BCS - 25.9 - - - - - - WGIIIlnband 0.6-1.1 25.9-27.5 20.0 25.1 - - - - WIii

Ex-band 1.0-1.7 18.2-30.2 22.7-24.1 27.5-30.1 6170 20 F-G 2-4 WI-WIV(8545)IX BCS 1.0 29.3-38.1 22.4 WIV-UG- - - - -

lnband 0.9-1.6 22.1-47.4 17.7-24.1 23.6-29.7 - - - - WII-UGEx-band 1.2-1.6 19.2-30.8 22.0-25.2 26.8-30.1 - 26 G-G3 2-5 Yz WI-WIV

VIIIC BCS 1.0-1.2 28.5-48.1 17.1 - - - - - WII-UGINBAND 1.0-1.8 29.6-48.1 17.1-21.0 - - - - - WIV-UG

5830-

Ex-band 1.2-1.8 20.6-32.3 21.7-25.6 26.2-31.7 6075 22 F/G 1 Y:z-3 WI-WIVVIIIB (8580- Yz8685)

BCS - 20.6-34.6 - - - - - - WI-WIVlnband 0.7-1.8 23.8-34.6 19.7-23.2 26.8-29.2 - - - - WII-WIV

Ex-band 0.9-1.8 21.2-33.5 19.0-23.9 26.1-29.1 6110 23 F/G 1 Yz-3 WII-WIV(8605) YzVIIIA BCS I 1.0-1.2 26.0 I 43.9 I Wnt-UGr r - r - - r - -INBAND 0.7-1.4 25.5-49.2 14.1-21.9 27.5-29.1 - - - - WIII-UG.

6080-

Ex-band 0.5-1.7 19.7-29.3 20.7-25.3 24.9-32.7 6285 20 F-G 1 Yz-3 Wl-WIVVIII (8575-I

I I 8670)BCS 0.8-1.2 19.7-38.6 16.9-24.9 24.0-31.4 - 21 - - WI-UG - -...... '\~ sn ptq1f'{I.. .

(y

••••

. )

'.l

. \

Job No. 3417145 33

•Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL

Coal Type of Proximate Analysis UVM% CV C.I. C.T. S.I. GradeSeams Analysis M% Ash% VM%

INBAND 0.5-1.3 27.8-36.6 27.5 - - - - - WIII-UG

Ex-band 0.7-1.5 20.6-32.8 19.5-25.7 25.8-32.3 5095 F/G 3 Yi C-F(8730) -

VIIC BCS 30.8-39.5 D-E- - - - - - -

INBAND 0.9-1.5 22.1-42.2 18.9-23.8 25.8-30.3 - - - - D-UG

Ex-band 0.9-1.0 21.5-29.3 20.6-23.7 26.4-30.2 - - F - WII-WIV

VIIB BCS 1.0 36.3-36.9 - - - - - - E-F

INBAND 0.7-1.5 26.1-42.1 17.6-23.0 25.3-30.9 - - - - WIII-UG

Ex-band 0.8-1.3 21.0-33.4 18.8-22.9 24.9-27.4 - 26 G-G2 2-6 WI-WIV

VIIA BCS 1.1 25.4-27.4 21.3 - - - ~ - Will.

lnband 1.0-1.1 25.4-27.4 21.3 - - - - - WIii6520-

Ex-band 0.5-1.3 14.8-24.9 20.5-26.9 24.6-31.9 6670 - D-G/G1 2-3 SI-WIiiVINII (8605)

COMB BCS 0.4-1.0 17.8-25.0 22.4-24.0 SIi-Wiii- - - - -

lnband 0.5-1.2 18.4-34.1 20.1-25.7 24.8-32.0 - - - - WI-WIV6270-

VANI/ Ex-band 0.4-1.4 18.6-33.4 18.8-26.3 23.6-31.6 6455 20/24 F/G1 2-3 Yi WI-WIV

VII (8730)

COMB BCS 0.6 20.2-34.1 21.4 - - - - - WI-WIV-

lnband 0.5-1.4 23.4-41.1 16.5-22.0 22.9 - - - - WIII-UG

Ex-band 0.4-1.4 17.6-30.1 · 21.2-24.9 25.3-31.5 5660- F-G1 3-5 SII-WIV6270 -

VA BCS 0.4-0.8 22.6-30.0 20.8-24.2 WII-WIV- - - - -lnband 0.4-1.2 17.8-35.2 20.5-24.2 25.2-32.3 - - - - SII-UG

5870-

Ex-band 0.4-1.3 18.5-31.6 18.4-24.1 22.3-31.1 6200 16-23 E-G1 1-3 Yi WI-WIVV

(8650-8730)

BCS 0.4-1.3 23.6-34.8 18.0-23.2 - - - - - WI-UG

lnband 0.4-1.3 18.5-47.7 17.8-23.2 22.9-27 .1 - - - - WI-UG

4590-

Ex-band 0.4-1.3 20.7-31.7 17.6-31.2 21.4-39.4 6320 19-23 E-G1 1-3 WI-WIV(8130-

IV 8725)

BCS 0.4-1.3 24.0-35.2 17.2-22.2 - - - - - WII-UG

lnband 0.4-1.3 24.0-47.7 16.5-22.2 21.1-28.4 - - - - WIII-UG

Ex-band 0.4-1.2 20.3-34.6 17.8-24.6 21.3-33.6 6015 18/20 F-G 1 Yi-2 WII-WIV(8715) Yi

Ill BCS 0.4-1.0 24.7-37.6 17.2-21.3 WIII-UG- - - - -

lnband 0.4-1.3 24.4-45.2 15.8-24.4 21.6-33.8 - - - - WIII-UG6045-

IIA Ex-band 0.4-1.2 21.3-35.0 15.7-22.3 21.9-27.9 6450 · 25 F-G3 2-4 Yi B-E(8670- A

- 1. ~ -'41• .. ~· .. I 'It I

.. JobNo.3417145 34 ~-v\.ft PROJfro.l,<o~ER~ 'l~d'l't 1ffllIT ~ ~-. .

\

'1Kotre.. Sasantpur Pachmo Coal Mm~

lfh:•~~o.~C.C.L .. Ranchi


Coal Type of Proximate Analysis UVM% CV C.I. C.T. S.I. GradeSeams Analysis M% Ash% VM%8690)

BCS 0.4-1.2 31.8-45.7 15.7-18.1 - - - - - E-Flnband 0.4-1.2 31.8-47.3 15.7-19.0 - - - - - E-G

Ex-band 0.5-1.0 14.0-31.7 17.3-25.4 19.2-31.7 - 18 - - SI-WIVIIlnband 0.6-1.0 17.3-48.5 15.8-21.7 21.3-33.7 SII-UG- - - -

Ex-band 0.4-1.3 23.5-30.2 17.6-21.4 21.5-26.9 5570 - F 2 B-DIITOP BCS 0.4-1.0 23.4-38.8 . 15.8-20.6 - - - - - D-E

lnband 0.4-1.2 23.4-39.8 15.8-20.6 - - - - - D-EEx-band 0.5-1.3 22.3-33.4 17.6-21.5 21.0-26.3 4090 - - - B-D

II BOT BCS 0.6-1.0 31.2-45.0 14.9-16.1 D-F- - - - -lnband 0.4-1.2 31.2-46.6 14.9-18.9 - - - - - D-G

Ex-band 0.9-1.0 24.2-28.5 17.8 22.0 - 19 F/G 1 ~-6 C-DII BCS 29.2-46.6 ~-GCOMB - - - - - - -

lnband 0.8-1.0 29.2-43.3 17.1 - - - - - D-FEx-band 0.4-0.9 20.2-32.7 16.7-19.2 19.5-22.8 - 14 E/F 1~ 8-D

I BCS 0.5-0.8 41.2-48.8 13.1-15.8 - - - - - F-Glnband 0.5-1.1 41.2-52.8 13.1-15.8 - - - - - F-UG

LOCAL Ex-band 0.6-1.4 18.6-26.5 16.0-26.5 18.1-32.3 - 14 F 1 WI-WIiiBELO

w In band 0.6-1.4 19.3-37.6 16.0-26.5 18.1-32.3 - - - - WI-UGSEAM I

Ex-band 0.4-0.9 18.8-28.8 15.7-19.0 17.9-22.8 - - F - WI-WIiiSEAM BCS_ . 0.4--1.0 25.6::_30~0 . 15.6-18.9 Wlll::UG .- - - - -'O'

lnband 0.4-0.9 25.6-30.0 15.6-18.9 - - - - - WIII-UGNote: Figures in parenthesis are on unit coal basis

4.4.2.5.2 Ultimate Analysis

Table 4.16: Ultimate Analysis of Seams

Coal C% H% N% S% 0%by CO2 as P%Seam diff carbonate

57.63-66.96 3.26-3.81 'XIII (88.32-89.77) (5.08-5.23) - 0.52 - 0.74 -

IXII 65.09-65.52 3.75-3.84 0.64-0.93(88.55-89.23) (5.11-5.21) - - - -

I XIA r 64.22-67.31 r 3.80-3.86 0.55-1.31 0.58 r0.85-1.22 f

I - ... -(88.58-89.18) (5.11-5.23)

XI 60.49-69.10 3.58-4.04 1.43-1.48 0.56-0.60 (0.61) 0.41-1.24 \(86.1-90.33) (4.97-5.30) (2.10) (0:60) -

XA NA NA NA NA NA NA NA

I X 61.30-69.0 I 3.47-4.88 1.50-1.60 0.50-0.67 (4.90- 0.12-1.32 0.369(86.60-89.16) I (4.84-5.30) (2.10) (0.60) 5.50) - ....!XA 65.51-67.21 3.72-3.96 - 0.62 - 0.57-0.95 • 1i'xq~ .... :-rr l,)tl~'Pl'<l

Job No. 3417145 35 . ,..~f2r_tr.~~FICE\~q't'l\.l:!.' m

c.(/ I

•

•

I.·

. '

R~/'7 lffif~ . I

~~\"-\ Kotre Basantpur Pachm~ Coal Mi e~o'dto~o. ~

c.C.L., Ranchi

.·.·.'~~


Coal C% H% N% S% 0%by CO2 as P%Seam diff carbonate

(88.42-90.07) (5.11-5.28)

IX 62.53-68:18 3.63-4.04 1.31-1.70 0.68-0.70 (3.30) 0.11-0.95 0.055(87.70-90.56) (5.10-5.23) (2.30) (0.70)

VIIIC 62,37-67.79 3.49-3.98 1.62 0.77 0.43-0.96(87.70-90.70) (5.06-5.20)

- -

VIIIB 59.40-66.44 3.40-3.83 1.40-1.60 0.60-0.64 (3.50- 0.11-0.36 0.316(87.90-88.70) (5.00-5.10) (2.00-2.30) (0.60) 3.90)

VIIIA 63.30 (89.10) 3.60 (5.10) 1.50 (2.10) 0.60 (0.60) (3.10) 0.09 0.032

VIII 61.52-66.34 3.53~3.90 1.37-1.50 0.60-0.80 (3.50) 0.05-1.08 0.433(88.12-91.10) (5.00-5.80) (2.00) (0 .60-0.80)

VIIC 52.10-66.30 3.00-4.03 1.30 (2.10) 0.60 (0.70) (3.70) 0.12-1.12(88.06-89.30) (5.20-5.35)

-

VIIB 60.65-60.69 0.75-1.47(90.24-91.35) - - - - -

VIIA NA NA NA NA NA NA NAVINII 69.20-71.02 3.74-4.00 1.1-1.3 0.47-0.62 (3.50) 0.61-1.70COMB (89.11-91.30) (4.83-5.20) ('1.60) (0.50)

-

VANINII 61.63-68.80 3.29-4.01 1.32-1.54 0.58-0.64 (2.90- 0.47-1.20 0.144COMB (88.55-91.63) (4.92-5.20) (1.90-2.00) (0.60) 3.50)

VA 64.20-68.31 3.56-3.81 1.20-1.40 0.60-0.68 (2.90) 0.71-1.39(89.12-90.12) (4.89-5.20) (1.90) (0.60) -

V 60.20-66.18 3.30-3.77 1.08-1.55 0.40-0.85 (2.80- 0.40-1.44 0.200(86.80-90.28) (4.80-5.80) (1.60-2.10) (0.50-0. 70) 5.50)

IV 59.96-65.66 3.21-3.70 1.08-1.52 0.41-0.84 ( 1.70- 0:40-1.49 0.117-(88.17-91.00) (4.70-5.20) (1.60-2.00) (0.5-0.7) 3.50) 0.167

Ill 57.01-67.05 3.20-3.74 1.01-1.41 0.49-0.96 (2.00- 0.45-1.27(88.20-91.97J (4.79-5.10) (1.70-2.2()) (0.60-0. 70) 3.10) -

IIA 56.13-66.40 3.11-3.55 1.11-1.33 0.42-0.76 (2.70- 0.43-1.15 0.402(88.56-90.50) (4.94-5.20) (1.70-2.00) (0.50-0.60) 3.00)

II 60.42-76.50 3.36-3.97 0.56 0.39-1.29(90.41-91.69) (4.76-5.03) - - -

IITOP - - - - - - -

11 BOT 64.48 (88.91) 3.61 (4.98) 1.10 0.56 - 0.50 · -

IICOMB 60.63-74.64 3.30-4.20 1.08-1.41 0.50-0.62 (2.30) 0.46-0.72(89.32-90.10) (4.78-5.02) (2.10) (0.60)

-

I 47.53-60.60 2.58-3.23 1.00-1.05 0.46-0.54 (2.10) 0.91(89-80-90.30) (4.79-4.90) (2.00) (0.70)

-

LOCALBELOW 65.01 (90.19) 3.47 (4.81) 1.28 0.49 - 1.80 -SEAM I

SEAM 'O' 65.56 (90.18) 3.48 (4.79) 1.05 0.41 - 0.45 -

Note: Figures in parenthesis are on unit coal basis

Job No. 3417145 36 · ~~~ 0Mffil:rnf";"fP ._..,.,, .· .. qe.. Kotre Basantpur ac,"· ~'. , ....

-#,o°ffio~o. ~T

C.C.L.. Ra:--w

Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL )

)

( )4.4.2.6 Petrographic Analysis .

Table 4.17: Petrographic Analysis of Seams in Kotre-Basantpur & Pachmo Combined

Seam No. Vitrinite% Exinite% lnertinite% Vmm% Reflectance

XIII 48.5-60.5 2.5-5.9 18.0-27.2 18.4-19.0 1.05-1.10(59.4-74.7) (3.1-7.2) (22.2-33.4)XII 60.5 (74.7) 2.5 (3.1) 18.0 (22.2) 19.0 1.10

XIA 52.2-62.4 5.4-7.2 17.0-19.7 12.5-23.6 1.03-1.09(68.4-71.3) (6.2-9.4) (22.2-22.5)

XI 44.4-49.0 4.2-7.3 23.2-26.9 19.0-23.6 1.05-1.12(57 .1-64.1) (5.6-9.0) · (30.3-34.6)XA NA NA NA NA NAX 40.9 (50.7) 6.5(8.1) 33.3 (~ 1.2) 19.3 1.13

IXA NA NA NA NA NAIX 51.2 (59.7) 5.4 (6.3) 29.2 (34.0) 14.2 1.24

VIIIC NA NA NA NA NAVIIIB NA NA NA NA NAVIIIA NA NA NA NA NA

VIII 44.6-50.7 2.5-8.0 26.4-33.2 12.3-22.0 1.03-1.10(57.2-60.1) (2.9-9.1) (32.6-39.0) (0.82-1.29)

VIIC 35.3 (54.0) 0.8 (1.2) 29.3 (44.8) 34.6 1.15

VINII COMB. 38.8-47.1 1.2-3.8 35.1-39.4 12.3-20.8 1.09-1.21(49.0-53.7) (1.4-4.8) (42.5-46.2) (0.85-1.38)

VANINII COMB 34.0-45.40 0.7-4.7 37.8-45.3 11.4-24.5 1.00-1.20(43.8-51.6) (0.9-5.3) (43.1-54.1)

VA 41.6-46.8 1.9-5.6 28.2-38.7 14.1-23.3 1.05-1.16(48.4-60.8) (2.5-6.5) (36.7-45.1) (0.80-1.36)

V 35.7-44.6 Trace-5.5 37.1-45.6 17.5-21.8 1.08-1.34(43.7-54.0) (0.4-6.7) (45.0-55.5) (0.96-1.48)

V (On washed coal 39.7-55.55 1.0-2.7 (1.2- 30.2-42.9 13.3-14.7 1.05-1.18@ 1.50 Sp.gr.cut) (46.5-64.0) 3.2) (34.8-50.8)

IV 26.0-46.9 Trace-12.7 34.9-52.0 14.0-23.0 0.99-1.33I (30.3-54.5) (0.6-14.8) (40.6-63.0) (0.85-1.49)

IV (on washed coal !::J2.o (60.1) 2.7(3.1) 31.4 (36.2) 13.3 1.08@ 1.50 sp.gr.cut)

111 24.5-48.9 I o.3-10.5 (o.4- 27.4-50.6 13.8-25.7 1.08-1.39(32.5-65.8) 10.5) (31.8-67.0) (32.0) (0.80-1.48)

I 39.9-52,8 0.4-10.4 (0.5- 22.1-44,5 1.13-1.16fiA i 14.7-17.6(46.9-61.9) 12.2) (26.9-52.3) (0.9-1.38)

II 28.6-33.4 Trace-0.5 ~ 1.6-45.1 24.5-26.3 1.31-1.50(38.8-44.2) (trace-0.7) . (55.1-61.2)-

II TOP 39.5 (46.0) 8.8 (10.2) 37.6 (43.8) 14.1 1.16

II BOT I 37.0-45.0 0.2-8.9 31.8-46.4 14.3-1.64 0.25-1.16(44 .3-52.6) (0.2-10.4) (37:0-55.5) (0 .92-1.48)

I 36.6-47.2 Trace-8.1 30.4-43.8 13.0-20.7 1.1.5-1..51(46.2-55.0) (9.5) (35.5-53.4) - -Uhl.lJl'J1"'11 ~ 111""1'4'1''

•)

JobNo. 3417145 37 RRO~ID10FFICER 1~/~ tH1d4~ q~l ~ 1fli~,"\Votre Basantpur Pachm~ Coal iii

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Project Report for Kotre Basantpur Pachmo OCP {5.0MTY), CCL

Seam No. Vitrinite% E.xinite% lnertinite% Vmm% ReflectanceLOCAL 23.0 (33.2) 0.2 (0.3) 46.0 (66.5) 30.8 1.28

'O' 25.3 (29.6) 1.1 (1.3) 59.1 (69.1) 14.5 1.12Note: Data in parenthesis is on visible Mineral Matter Free Basis.

4.4.2.7 Washability TestsDetails of Washability tests on borehole coal cores of CMB-75, 76, 79 & 80

A) Table 4.18: Details of Raw Coal & Screen Analysis (Raw Coal Crushed to 13mm Top size)

Depth Thickness Overall 13-6mm 6-0.Smm -0.5mmSeam Bh No. (m) Ash%From To Wt% Ash% Wt% Ash% Wt% Ash%

Combining CMB75 40.92 55.81 14.89 64.8 34.6 30.1 33.1 5.1 24.2Coals Of 33.6Seam CMB80 104.90 118.95 14.05VANINIISeamV CMB75 63.83 72.65 8.82 35.2 67.7 37.1 27.6 32.1 4.7 25.9

CMB76 10.00 13.80 3.80(IV)Combining CMB79Coals Of (V) 200.88 207.29 6.41 36.6 67.5 38.7 27.7 33.5 4.8 25.8Seam IV & V

'CM880 144.70 148.80 4.10(IV)

8) Table 4.19: Cleaning Possibility (Size of Washed Coals=13-0.5mm)

SeamCleans Middlings Sinks

Sp.Gr.Cut Wt% Ash% Sp.Gr.Cut Wt% Ash% Sp.Gr.Cut . Wt% Ash%Combining 1.61 60.0 17.0 1.61-1.80 11.7 44.4 1.80 28.3 66.2VI/VII & VA (56.9) (11.1) (26.9)

VA 1.61-1]0 ~.3(4.1) 38.5 1.70 t35.7(33.9) 62.5

V 1.48 38.2 17.0 1.48-1.80 43.2 37.5 1.80 18.6 69.7(36.4) (41.2) (17. 7)Combining IV 1.52 25.0 17.0 1.52-1.80 54.3 35.9 1.80 20.7 64.7

&V (23.8) (51.7) (19.7)

C) Table 4.20 Quality of Products (As Analysed Basis)

Combining VINII & VA V Combining IV & VTests Particulars MiddlingsCleans Cleans Middlings Cleans Middlings

M% 0.9 0.8 0.7 0.7 0.8 0.7

As Anelysed Ash% 18.4 42.8 17.2 36.7 17.1 34.1Basis V.M.% 23.9 19.9 26.4 20.3 24.2 19.4

C.V.(Gross) 4335 5015 5355

Ultimate C.I. 22 27 26Analysis C.T. F G3 G1/G2Ultimate S.I. 1% 4% / ./

4 Y.,-

Job No. 3417145 38 ~,~~ "11'<~~-~I l,'M_F'l][I IPROJECT OFFICE. - .:,.

R~ <ii ·tH1 '.!, '{ q"cf'r~ cf, I~ -i;nf'if

Kotre Basantpur Pachmo Coal Minemomo~o. ~r'r.ft

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Combining VI/VII & VA V- Combining IV & VTests Particulars

Cleans Middlings Cleans Middlings Cleans MiddlingsAnalysis

·--·--· ~--·-- --· -~ ·--- ·---

C% 69.2 45.1 70.2 51.6 70.9 55.5(88.0)Ultimate H% 4.1(5.2) 2.6 4.3 3.1 4.2 3.0Analysis

N% 1.2(1.6) 0.9 1.3 0.9 1.2 1.0S% 0.5 0.4 0.6 0.5 0.6 0.5

Ultimate CO2% 0.46 1.55 0.28 0.69 0.18 0.80Analysis P% 0.081 0.082 0.031 0.040 0.033 0.034

I.D. >1400 >1400 1395Ash Fusion H.T. >1400 >1400 >1400Range

F.T. >1400 >1400 >1400

Table 4.21: Ash Fusion Range for Coal Seams of Kotre-Basantpur Block, WBCF

BHNO SeamDepth Ash Fusion Range

From To Thickness I.D.T. H.T. F.T.XII 13.75 15.80 2.05 1260 1380 > 1400XIA 52.28 55.43 3.15 1240 1360 > 1400

CMB-12*XI 82.86 86.70 3.85 1280 >1400 > 1400 ,X 125.71 127.55 1.84 1280 >1400 > 1400

VINII 25.69 34.16 8.47 1300 > 1400 > 1400CMB-22 VA 36.00 39.89 3.89 1300 > 1400 > 1400

V - 49.64 53.05 3.41 1280- > 14f:l(') > 1400

•*Falls Outside the block near Western Block Boundary.

Table 4.22: Washability Tests of Boreholes in Pachmo Block. •Borehole No. CMPM-20 CMPM-21 CMPM-21 CMPM-21Seam v. IV Ill IIAThickness 5.40 4.50 4-.30 2.70A). Screen AnalyisRAW COAL WT% ASH% WT% ASH% WT% ASH% WT% ASH%13-6mm 62.8 32.9 60.8 35.0 62.0 38.4 61.9 47.16-0.50 30.0 28.7 32.6 30.9 31.6 32.7 31.6 40.6-0.50 7.2 21.8 6.6 23.3 6.4 27.5 6.5 31.9Tota! 100.0 30.8 100.0 32.9 I 100.0 35.9 100.0 r 44.1B). Fl,.OAT & SINK TEST

i) Cleaning PossibilitiesSIZE(13-6)mm CUT AT<1.50 31.2 I 19.6 21.4 20.5 17.0 I 18.7 . 8.7 19.01.50-1.80 59.1 35.2 67.0 35.6 62.6 35.5 44.3 36.8>1.80 9.7 61.2 11.6 58.5 20 4 63.9 47.0 .. 62.1... - ,.,,~·· ,iu \JJ'1 I '1 I C1 <11 I xr

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Job No. 3417145 39 ~~ flP-8,00Mil OFFl('FQ~,J\_\~1/ cf;Tffi 4-ttd~'{ lfifl'{IrvS\' Kotre Basantpur Pn··

~olf'tn~-,··.. [_


Borehole No. CMPM-20 CMPM-21 CMPM-21 CMPM-21Total 100.0 32.9 100.0 35.0 100.0 38.4 100.0 47.1

ii) Size(6-0.5)mm CUT AT

<1.50 43.1 15.3 35.4 16.0 29.9 14.9 22.0 13.71.50-1.80 48.1 34.8 53.4 35.2 54.5 34.1 41.7 37.2>1.80 8.8 60.6 11.2 57.6 15.6 61.9 36.3 60.8Total 100.0 28.7 100.0 30.9 100.0 32.7 100.0 40.6iii) Cumulative Washability Tests for 13-0.5mm (cleaning possibilities) sp.gr.cut1.50 35.0 17.9 26.3 18.4 21.4 16.9 13.2 16.01.80 90.5 28.4 88.5 30.4 81.2 30.3 56.6 32.1Total 100.0 31.5 100.0 33.6 100.0 36.5 100.0 44.9iv) Washability Products 100% RAW COAL BASISCLEAN COAL AT 32.5 17.9 24.6 18.4 20.0 16.9 12.3 16:01.50 s.g.MIDDLINGS 1.50- 51.5 35.1 58.1 35.5 56.0 35.1 40.6 36.91.80 s.g.SINKS AT 1.80 s.g. 8.8 61.0 10.7 58.2 17.6 63.3 40.6 61.7FINES (-0.5mm) 7.2 21.8 6.6 23.3 6.4 27.5 6.5 31.9COAL

Table 4.23: Detailed Chemical Analysis On Different Fractions Of Washed Coals From BH NO

CMPM-20 and 21, Pachmo Block, West Bokaro Coalfield.

Particulars Of Seam V (CMPM20) Seam IV (CMPM21) Seam Ill (CMPM21) Seam IIA (CMPM21)Analysis Cleans Middlings Sinks Cleans Middlings Sinks Cleans fMiddlings Sinks Cleans Middlings I Sinks

1) Proximate Analysisa) M% 0.8 0.7 - 0.7 0.7 - 0.8 0.8 - 0.8 0.7 -b)A% 17.9 35.1 61.4 18.4 35.5 58.4 16.9 35.0 63.4 16.1 38.3 61.9c)VM% 21.6 17.5 - 20.6 17.2 - 20.7 16.8 - 21.4 12.8 -d) FC% 59.7 46.7 - 60.3 46.6 - 61.6 47.4 - 61.7 48.2. -

'f

2) Coking Propertiesa)LT C.T. G-1 - - F/G - - G - - G-3 - -b) S.I. 5.0 - - 3 Yi - - 4 Yi - - 5 Yi - -

3) UNITVM% 24.6 - - 23.5 - - 23.3 - - 23.9 - -

4) GROSS CV (K - 5295 2785 - 5300 2960 - 5295 2570 - 4940 2690Cal/Kg)5) Ultimate Analysis (Dmmf Basis)

C% 71.5 71.2 72.7 73.6(90.2) - - (90.4) - - (90.5) - - (90.7) - -

3.5 4.0 . 4.0 4.1 .H% (4.9) - - (5.1) - - (4.9) - - (5.1) - -

N% 1.4 1.4 1.4 1.4(1.7) - - (1.8) - - (1.8) - - (1.8) - -

S% 0.6 0.6 0.5 0.6(0.5) - - (0.5) - - (0.5) - - (0.5) - -

.~/~/ \ffi:~1\Jl.-il '111c.t(J)l'<I

Job No. 3417145 40 ~~~~~~~(!~ICER_- .'ti Q~'( tf'i.fm ~ Jtrl'if

l<otre Basantpur Pachmo Coal Mine~o~o~a. tfrffC.C.L. Ranchi


· Particulars Of Seam V (CMPM20) Seam IV (CMPM21) Seam Ill (CMPM21) Seam IIA (CMPM21)Analysis Cleans Middlings Sinks Cleans Middlings Sinks Cleans Middlings Sinks Cleans Middlings Sinks

0%(By diff) (2.7) - - (2.2) - - (2.3) - - (1.9) - -

6) Phosphorous% 0.024 - - 0.020 - - 0.047 - - 0.069 - -7) CO2% (As 0.45 - - 0.39 - - 0.36 - - 0.52 - -Carbonate)8) Ash Fusion Rangea)IDT - 1305 - - 1345 - - 1385 - - 1265 -

b)HT - >1400 - - >1400 - - >1400 - - >1400 -

c)FT - >1400 - - >1400 - - >1400 - - >1400 -9) SAPOZHNIKOVTEST(M.T.P.L.}

M.T.P.L. 15 - - 14 - - 17 - - - - -

10) Gieseler's Test -··-·-- .. ----· --a}MAX. FLUID11Y 130 - - 34 - - 140 - - - - -

·----·~·b)PLASTIC 44 - - 41 - - 59 - - - - -

RANGE

4.4.2.7 GKLTC Assay of Seam IIA & IV available from CML-40, Pachmo Block, West Bokaro

Coalfield.Seam IIA:The details of yield per tonne are yiven below.

Coke (Kg) 836.5Tar (lit) 72.0Liquor (.lit). \ 28.6Ammonia (kg) 0.92Gas (at STP) 88.4Behaviour on distillation is as under.

365405G

Oil Point (°C)Gas Point (°C)Coke typeSeam IV:

The yield per tonne of dry coal is as under.

Coke (Kg) 835.9Tar (lit) 81.2Liquor (lit) 32.1Ammonia (kg) 1.11Gas (at STP) 83.3

Behaviour on distillation is as under.

Oil Point (°C)Gas Point (°C)Coke type

378410F/G

Job No. 3417145 41 Rl-3, CMPDI

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4.6 GEOLOGICAL RESERVES:

4.6.1 Brief methodology adopted for Reserve Estimation:The in-situ geological reserves of the individual coal seams and the coal horizon have been

calculated with the help of isochores drawn for the individual seams. The isochores have been

drawn based on the thickness of the individual seams encountered in the boreholes (after

necessary correction of roof - floor based on Band-by-Band analysis. Area between the two

consecutive isochores thus drawn has been multiplied by the average thickness to obtain the

volume of coal. The volume of the coal arrived have been multiplied by the specific gravity of

the coal to obtain the gross reserve of the coal. A deduction of 10% from the gross reserve

were made on account of unforeseen geological descriptions to arrive at the net in-situ

Geological Reserve.

4.6.2 Net geological reserves within the block area:Net geological reserves of combined block is 250.391 MT including 222.079 MT of proved

reserves and 28.312 MT of indicated reserves. The combined block has highest proved net-

geological reserves in WG-IV of 102.90 MT. It has meagre 0.078 MT of reserves in SG-11 of

seam VINII combined which falls as the most important seam of the block. The combined

blocks have 30.626 MT of reserves falling in SG-11 to WG-IV. So it has strong potentiality in

medium coking coal.

Grade wise, Depth wise, thickness wise net geological reserves have been tabulated below.

Table 4.23: Reserves of Kotre Basantpur & Pachmo Blocks showing sequence of coal seams,range of grade, seam wise total proved and indicated 'net' geological reserve

Grade Kotre-Basantpur Block Pachmo Block CombinedSeam Range Proved Indicated Total Proved Indicated Total Proved Indicated Total

XIII WG IV-UG 1.201 1.201 0.000 1.201 0.000 1.201XII WG 111-UG 1.752 1.752 0.000 1.752 0.000 1.752XI WG IV-UG 3.807 3.807 0.862 0.862 4.669 0.000 4.669X WG 11-UG 6.366 6.366 2.927 2.927 9.293 0.000 9.293

IX WG 11-UG 3.100 3.100 1.132 1.132 4.232 0.000 4.232

VIII C WG 1-UG 0.000 0.365 0.365 0.365 0.000 0.365

VIII B WG 1-UG 0.000 1.161 1.161 1.161 0.000 1.161

VIII A WG 111-uG 0.000 0.644 0.644 0.644 0.000 0.644VIII Wd 111-UG 5.869 5.869 3.509 3.509 9.378 0.000 9.378

VIN/ISG II- 23.612 23.612 7.014 7.014 30.626 0.000 30.626WGIV

VAN/NI/ WGIV 0.000 7.062 7.062 7.062 0.000 7.062/ '1 f '( "H\lf-fT ~ if>

Job No. 3417145 42 ~ \'Is "~ ·~y~f'V'\.. iJmR ..~D1FFICER~ - ~ lJlfllT <l>tci 1lTi

. Kotre Basantpur Pachmo Coat M_-fwtowto~o. Uifi me

C.C.L.. Ranchi

~vqR4)uHT 31-~~ct,=1~'" ,-t ·

PROJECT OFFICER~ -.tid~~ <ITTl.'I ~~.

v t e Basa~ Pach mo Coal Mmel"\01 ~~~~

\.~ C.L. R.~:· ·:,


Grade Kotre-Basantpur Block Pachmo Block CombinedSeam Range Proved Indicated Total Proved Indicated Total Proved Indicated Total

VA WG I- 17 .365 17.365 5.746 5.746 23.111 0.000 23.111WGIV

V WG 111-UG 22.575 22.575 14.205 14.205 36.780 0.000 36.780-IV

WG II- 19.287 19.287 14.748 14.748 34.035 0.000 34.035WGIV

Ill WG 111-UG 7.692 5.820 13.512 9.948 2.388 12.336 17.640 8.208 25.848

/IA D-G 0.000 5.806 0.809 6.615 5.806 0.809 6.615

II Top WG IV-UG 0.000 4.136 1.824 5.960 4.136 1.824 5.960

II Bot WG IV-UG 0.000 4.657 2.524 7.181 4.657 2.524 7.181

II WG 111-UG 14.621 6.334 20.955 0.925 0.143 1.068 15.546 6.477 22.023

I B-G 0.000 5.294 4.163 9.457 5.294 4.163 9.457

LocalWG I- 4.691 4.307 8.998 0.000 4.691 4.307 8.998WGIV

Total 131.938 16.461 148.399 90.141 11.851 1~.992 222.079 28.312 250.391,, r

Table 4.24: Breakup of Net Geological Reserve considered in Kotre Basantpur & Pachmo OCP

SN Particulars Coal (MT)Kotre Basantpur Block

1 Net Geological reserve 148.40

2 Net Geological reserve lost due to Chutua Nala 17.433 . Net geological reserves in Seam Local, below OC mine floor (not opencastable) 9.00

4 Net Geological reserve available (1-2-3) 121.97 i--

Pachmo Block5 Net Geological reserve 101.99 ·

6 Net Geological reserve lost due to barrier from eastern block boundary 0.507 Net geological reserves in Seam I, below OC mine floor (not opencastable) 9.46

8Net geological reserves near BH CMB-72, below OC mine floor (seams IV, Ill & 0.73II not opcncastablc due to fault)

9 Net Geological reserve available (5-6-7-8) 91.3110 Net Geological reserves including batter (4+9) 213.2811 Net Geological reserve lost in batter 51.5612 Net Geological resen;e available fn quarry (9-10) r 161.71 ~

I I'

Job No. 3417145 43

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Project Report for Kotre Basantpur Pachmo OCP (5.0MTY). CCL

CHAPTER-VMINE BOUNDARY, RESERVES AND MINE LIFE

5.1 INTRODUCTION

The proposed Project Report of Kotre Basantpur Pach mo OCP is based on "Geological Report

on Kotre-Basantpur Block, West Bokaro Coalfield" prepared by CMPDI in Feb 1997 and

"Geological Report on Pachmo Block, West Bokaro Coalfield" prepared by CMPDI in Sep 1998.

It falls in the command area of Hazaribagh Area of Central Coalfields Limited and is located in

Ramgarh and Bokaro Districts of Jharkhand.

Kotre-Basantpur and Pachmo blocks are adjacent to each other and the boundary between the

blocks is along the southerly flowing Pachmo nala, which is a tributary of Chutua nala. The coal

seams occurring in the Kotre-Basantpur and Pachmo blocks are contiguous to each other and

same set of coal seams occur in both the blocks as seam-I to XI in ascending order.

Additionally, seam XII & XIII occur only in Kotre-Basantpur block. The entire block is found

suitable for exploitation by opencast mining method upto seam II as the base of quarry. Hence

both the blocks are proposed to be exploited by a single quarry. The seams below seam II are

not suitable for exploitation by opencast mining.

A geological/mine model using MINEX has been developed for the purpose of reserve

estimation. The Kotre Basantpur Pachmo (KBP) OCP can produce 5.0 Mty of washery grade

coal ih a sustainable basis.

5.2 PIT FORMULATION STRATEGY

The adopted pit formulation strategy is based on the following factors:

a) optimum extraction of available coal reserves,

b) maximise internal OB dumping, considering the steep gradient of the strata (8° to 18°),

c) giving due consideration to the safety of the mine workings and

d) maximise the profitability from the mining venture (Project economics).

The starting of the quarry has been proposed from the incrop of seam-II near fault F4 (Borehole

CMB-19 & CMB-20) in the western side ofBasantpur- Kotre side and it will gradually advance

. to dip side in the initial 11-12 years. Thereafter, it will move laterally along strike in1the eastward

direction i.e., towards Pachmo side. Coal from the seams will be transported through the flank

roads to surface for the first 10-11 years. Once the quarry reaches its southernmost extent and

attains maximum depth of about 285m, the coal will be brought to two distinct levels within the. -~.......,~....,,,,.<b~,.fl

~EtT<'.1'FFICERf\A.,"'b ~ -=~l:-'4.·a1~1Q,~ ~ ~-t

~ Kotre Bas:nt~:1r P~ch~9. -~oa! ;}ine,-.. ,'!f1,,<.!t'10. 'fl··.•

.. L r.~

will allow complete dumping in the quarry void as the need for keeping the southern flank roads

will be eliminated. Henceforth, further need for external OB dumping space will not be required.


5.3 MINE BOUNDARIES

The total coal bearing area of the proposed quarry is around 6.52 sq km. A total of 11 major

faults (throw varying from 0-300m). Among these F1 (throw: 100-300m), F2 (throw: 30-120m),

eastern side of F3 (throw: 20-120m), and F14 (throw: 80-150m} forms the boundary fault for the

quarry. The gradient of the strata is quite steep. It varies from 8deg to 25deg. However in major

part it is 8deg to 15deg.

Seam II has been considered the base seam, except in a small area around BH CMB-72,

where seams up to Seam-IV are proposed to be worked. The quarry will attain a maximum

depth of around 285m in the southern periphery.

• Reasons for selecting/omitting seams/sections

There are three coal horizons occurring below seam II viz. Seam I, Local Seam and Seam 'O'.

Seam I is impersistent & erratic in nature and therefore not considered for opencast mining. It

ranges in thickness from 0.15 to 6.57m (generally 0.5 to 0.9m) after a parting of 3.89-51.31 m

(generally 10 to 20 m} with the overlying Seam II in Kotre-Basantpur block and ranging in

thickness from 0..42 m to 3.98 m (generally 1. to 3 m) after a.parnm of 11.. 80_ m - 43.68 m

(generally 25 - 35m) with the overlying Seam II in Pachmo block.

A Local seam ranging in thickness from 0.10 m to 3.78 m (generally 1.5 - 2.5m} occurs below

. Seam I after a parting of 20.70 rn- 104.01 m (generally 30 - 50m} with the overlying Seam I in

Kotre-Basantpur· block is not mineable by opencast method. This local Seam has not

developed in Pachmo block.

Seam 'O' ranging in thickness from 0.40 to 2.45 m (generally 1 - 2m) occurs below the Local

Seam after a parting of 40.27 rn- 56.34 m (generally 40 - 50m) with the overlying Local Seam

in Kotre-Basantpur block, and ranging in thickness from 0.80 to 3.65m (generally 2.0 to 3.0 m)

after a parting of 53.30 - 69A5 m (qenerally 55 - 60m) with the overlying Seam I in Pachmo

block is not mineable by opencast method.

This Seams I, Local and 'O' may have mining potential by underground method. The

proposed opencast mining will in no way jeopardize (mining of these coal seam by

~~\'l>q~q) ,,Hl 3'~i61.ft~cJ\,;;~~~ECT_ OFF~R ( ,

-J-ob_N_o__ -34_1_7-14_5 4_5 K--=o...!.tr=e .,_B:a~e~a"-'~-"'"- chmo Coa~

lfiolfto~o. W'ilt nC C.L.. Ran~h· c

underground method in future, if feasible.

..•

.'.)

.)


Beside' this, coal reserve have been left out against barrier of Chutua nala and proposed

Railway line between f<edla Washery and Dania Railway Station.

• Mine Boundary

The mine boundary of the OCP has been fixed as follows:

East: The extent of eastern surface of the quarry has been fixed by keeping a minimum of -.

7.5m barrier from the eastern block boundary of Pachmo block as a barrier against adjoining

Lalgarh Block.

West: The western floor boundary has been has been fixed along the incrop of Seam-II.

North: The northern floor boundary has been fixed along the fault F1

South: In the south-western side, the surface boundary has been kept at the surface trace of

fault F2 (near the Kotre-Basantpur block southern boundary). In the south-eastern side, the

southern boundary has been kept along the surface trace of Fault F3, which also forms the

southern block boundary of the Pachmo block. In the south-central part, the surface boundary

has been fixed after keeping a barrier of minimum 40m against Chutua nala and a minimum of

80m from the tentative alignment of the railway siding proposed by CCL to transport coal from

Kedia WashefY, to Dania railway station. The said alignment is being suggested here for early

finalization of the Project Report which is subject to change after actual survey by Railway

Authorities.

However, necessary straightening of boundary has been made for convenience of mining.

An embankment along the Chutua nala is proposed to safeguard against inrush of water into

the mine. The embankment should be at least 3.0m above the HFL of Chutua nala. The

embankment should be designed, constructed and maintained as per the Indian Standard.

5.4 MINEABLE RESERVES:

The cumulative mineable reserve is estimated to be as 153.63 MT with corresponding volume

of O.B estimated as 734.53 Mm3 with an average stripping ratio of 4.78 cum/t.

10% of Geological loss and 5% of Mining loss has been considered to arrive at the mineable

reserve of the project. The seams having less than 1 m thickness has been excluded for the

calculation of the mineable reserve .

Job No. 3417145 46~ q~~h•~, 31f<lo,14l

PR~F-f~WICERqjITR iHi d ~~ 1l <me1 lflt1f

Kotre Basantpur Pachmo Coal Mine~o~o~o.~

C.C.L., Ranchi


Seam wise details of Geological vis-a-vis Mineable Reserves

SN Seam Avg Thickness Thickness Geological MineableName considered (m) range (m) Reserve (MT) Reserve (MT)

1 XIII 2.00 (1.29 - 4.54) 1.201 0.592 XII 2.00 (1.10 - 2.86) 1.752 0.803 XI 3.50 (2.48 - 5.20) 4.669 2.914 X 4.00 (1.00 - 6.63) 9.293 5.925 IX 2.00 ( 1.00 - 2.88) 4.232 3.136 VIIIC 1.10 (1.00 - 1.40) 0.365 0.367 VIII B 1.20 (1.00 - 1.50) 1.161 0.808 VIIIA 1.20 (1.00 - 1.60) 0.644 0.639 VIII 2.00 (1.30 - 3.45) 9.378 6.44

10 VINII 7.00 (4.80 - 9.66) 34.722 27.1711 VA 4.50 (1.72 - 7.40) 26.077 17.4612 V -5.00 (1.19-9.65) 36.780 22.9213 IV 5.00 (1.00 - 7.40) 34.035 20.6414 Ill 3.50 (1.00 - 8.17) 25.848 16.2215 IIA 2.50 (1.00 - 4.80) 6.615 3.7516 II Top 3.00 (1.00 - 7.63) 5.960 3.5417 II Bot 3.00 (1.00-6.41) 7.181 4.5518 II 6.00 (1.00 -12.45) 22.023 15.8019 I . (0.15-6.57) 9.457 .

20 Local - (0.10-3.78) 8.998 .

TOTAL 250.398 153.63

Reserve Balance:

The account of mineable reserve vis-a-vis geological reserve is given in the table below:

SN Particulars Coal (MT)Kotre Basantpur Block

1 Net Geological reserve 148.40t Net Geological reserve lost due to Chutua Nala 17.433 Net geological reserves in Seam Local, below OC mine floor (not opencastable) 9.004 Net Geological reserve available (1-2-3) 121.97

I Pachmo Block5 1 Net Geological reserve 101.99

6 ' Net Geological reserve lost due to barrier from eastern block boundary 0.507 Net geological reserves in Seam I, below OC mine floor (not opencastable) 9.46

8 Net geological reserves near BH CMB-72, below OC mine floor (seams IV, Ill & 0.73II not opencastable due to fault)9 Net Geological reserve available (5-6-7-8) 91.31, -10 Net Geological reserves including batter (4+9) ~/~ - ~,- ,'(I/ ' \ '11 .<4, -· .• .... ... .i

Job No. 3417145 47 /?_Va)\,' - P~s_~foR1'. FICE~ fl~Hl 'J,'( 'ti -q '1 I <ITTc{

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SN Particulars Coal (MT)

11 Net Geological reserve lost in batter 51.56

12 Net Geological reserve available in quarry (9-10) 161.71

13 Net Mineable· reserve available in quarry 153.63

Sector wise mineable reserves:

The calendar program has been drawn by dividing the whole mining .block into a number of

sectors. The sector wise mineable reserves have been given in the following table.

Sector wise and Seam wise details of Mineable Reserves (MT)

SectorsCoal (MT) Total

1 2 3 4 5 6 7 8 9 10 11 12

Seam XIII 0.23 0.28 0.06 0.01 0.59

Seam XII 0.54 0.19 0.05 0.02 0.80

Seam XI 0.00 0.01 1.27 0.56 0.88 0.16 0.02 2.91

SeamX 0.00 0.00 1.86 1.43 1.75 0.69 0.13 0.05 0.00 5.92

Seam IX 0.00 0.00 1.49 0.46 0.71 0.38 0.03 0.03 0.01 0.01 0.02 3.13

Seam VIII C 0.18 0.15 0.01 0.01 0.00 0.00 0.01 0.36

Seam VIII B 0.24 0.46 0.07 0.01 0.00 0.00 0.01 0.80

Seam VIII A 0.24 0.35 0.03 0.01 0.00 0.00 0.01 0.63

Seam VIII 0.00 0.11 2.47 0.75 0.82 1.60 0.56 0.08 0.01 0.03 6.44

Seam VINII 0.33 2.11 10.74 2.76 1.98 5.09 2.86 0.56 0.22 0.12 0.40 27.17 <L-

Seam VA 0.28 1.33 5.61 1.68 1.7J 3.56 2.21 0.46 0.17 0.08 0.35 17.46

SeamV 0.51 1.20 7.42 2.38 2.46 3.33 3.68 1.43 Q.27 0.08. 0.14 22.92

Seam IV 0.70 1.01 5.78 2.04 1.78 2.05 3.62 2.74 0.41 0.08 0.42 20.64

Seam Ill 0.04 0.83 0.68 3.94 1.88 1.01 1.01 2.19 3.53 0.47 0.09 0.56 16.22

Seam II A 0.14 0.23 0.44 1.84 0.78 0.16 0.15 3.75

Seam II TOP 0.81 0.45 0.78 0.82 0.37 0.30 3.54

Seam II BOT 1.09 0.53 0.94 1.15 0.52 0.32 4.55

Seam II o.42 2.45 1.72 5.06 4.53 1.62 15.80

Total 0.46 5.11 8.18 46.41 18.93 15.63 21.02 16.85 12.47 4.33 1.52 2.71 153.63

5.5 TARGET OUTPUT & MINE LIFE:

Job No. 3417145 48

The proposed mine is planned for nominal/ peak production of 5.0 MTY 'V\\t'.\.qAJiluMr ~Rlcit~'- FFICER~Riffl~~m~~

Kotre Basantpur Pachmo Coai Mme~o~o~o. ~

C CJ•.. Ra.r,ci,j

Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL( ',

()Zero Date:

The zero date may be defined as the date of land acquisition

'EMP approval and other necessary clearance whichever is later.

). a'·,•:_• , PR and

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\ )Mine Life:The mine life for nominal production is 36 years. It includes 3 years of construction period. The

break-up of life of mine are as under:

Particulars YearsMine Life (Production period) 33 (Production period)Construction period 3

Production build-up period 3Production period 29

Tapering period 1Total period (inc. Construction Period) 36

Design CriteriaFollowing design criteria has been adopted for the mining operation.

Nos. of annual working days

Nos. of Daily shift

330

3

8 hrs. -

Duration of each shift

The opencast mine is to be worked on the above three shifts per day and seven days per week,

schedule and the number of working days per year are adopted as 330.

5.6 ANY FURTHER EXPLORATION REQUIRED WITH TOTAL METERAGE AND NUMBER OF

BOREHOLES TO BE DRILLED AND AREA OF FURTHER DRILLING. ••A provision of 10-12 borP.holp.s shm 1lrl he kept for rlrilling of r1hrn 1t 1 ?OOm to mP.P.t thP. P.mP.rgP.nt

requirement of additional information at the time of mining coal from the property in the incrop

zone.

Job No. 3417145 49

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CHAPTER-VIMETHOD OF MINING

6.1 GENERAL

The method of mining proposed to be adopted to extract coal and OB in Kotre Basantpur

Pach mo OCP will be shovel-dumper combination of mining systems. Box cut will be made in the

western side of Kotre Basantpur Block near CMB-19 and CMB-20 (Fault F4). It will touch the

Seam-II at a floor RL of 360 and 340m.Once the proper benches have been formed and moderate length of strike is open, the mine will

gradually advance in rise to dip from north to south direction. The quarry is proposed to reach its

dip most extent (in the southern side) in the initial 11-12 years. By the end of 12 years (i.e., 15th

year of mine life), the quarry will attain its maximum depth of about 285m. Thereafter, it will move

laterally along strike and will go towards Pachmo side.

6.2 GEO-MINING CHARACTERISTICS

6.2.1 Seam Gradient - Variation, Av. gradient of quarry floor

The strike of the strata in major part of the quarry is roughly East-West with southerly dip. There

is a prominent swing in the strike in the boreholes NCWBK-34, CMB-22, 23, 78, 83, etc. depicting

major roll of the strata. Near the east central part of the quarry, strike gradually becomes NW-SE.

Beside this, some local swings are also observed in the strike. The gradient of the strata

generally ranges from so - 1 so in the western part and so - 250 in the eastern part However, in ·

major part of the quarry the gradient is mostly so - 1 so. The dip of the strata is southerly in major

part of the quarry.

Geological Disturbances - Nos. of faults and details thereof {throw and extent)

Fault Extent of the Strike Dip Amount of throw Evidences'No fault direction

F1c Northern block Curvilinear fault. Southerly in 100-190m in Kotre- lncrop of Seam O in justaposition of Seamboundary Trends ENE-WSW both the Basantpur and 100- VA, Based on floor contour plans.

(Kotre-Basantpur). blocks 300m as tentatively In Pachmo due to Occurrence ofWNW-ESE trend assessed in Pachmo metamorphics in juxtaposition with Lower(Pachmo Block) Block. Barakar-Karharbaries.

F2kb Marks the Almost NW-SE . Westerly 30-120m Occurrence of Barren Measures inwestern block juxtaposition with lower Barakars in theboundary.

. north, Complete omission of Seam XIII toXIA in CMB-57, etc

F2p Runs near the Curvilinear fault Northerly 100m Based on stratum contours. Occurrence ofnorth western having roughly E- younger seams in CMB-72 compared withblock boundary Wtrend CMB-73and abuts with

~~U~i:fault F1 ...... -/~ / - ..rv' -· ,....., ..,,,,

Job No. 3417145 50 /p t::i) \;' f"'r(UJRF-3 ER. ..<t>hrt ~ 'tf Cl~'(~ct lfft'rfKotre Basantpur Pachmo Coal Mine

~o-W)o~o. ~C.C.L., Ranchi


Fault Extent of the Strike Dip Amount of throw EvidencesNo fault directionF3c It runs in both ENE-WSW in Southerly in In Kotre-Basantpur 1. Seam VIIB to IV omitted in CMB-37.

Basantpur-Kotre Kotre-Basantpur Pachmo and block it's 40m-50m 2.Seam IV to II faulted in CMB-30and Pachmo Block. Westerly to In Pachrno Block it is 3. Encountered at roof of Seam V in CMB-Blocks, marks In Pachmo Block Southerly in 20-120m 50the southern Slightly curvilinear Kotre

4. owing to stratum contours and omissionblock boundary fault having almost Basantpurof Seam IV and Vin CMPM-10of Pachmo Block. NW-SE trend

F4kb Runs almost Slightly curvilinear North- 0-60m 1.0mission of lower part of Seam in CMB-parallel to fault fault with almost Easterly 89F3. It abuts with NW-SE in the · 2.0mission of Seam V,VA,VINII and VIIAfault F1 in North North west in CMB-91

F5.b Runs more or Slightly curvilinear Westerly 30-50m Throw of Based on stratum contours.less parallel to with almost NW- 30m in the northfault F4. SE trend gradually increases

to 50m near CMB-66F5p Runs in south Slightly curvilinear Southerly 0-20m Omission of Seam Vin CML-40, Omission

eastern part fault with roughly of IIIA and floor of Seam IV in CMPM-39,almost parallel to E-Wtrend. Omission of seam II Top and II Bottom infault F3. CMPM 41, etc.

F6c Runs in both the E-W to NiN-SE Southerly to 60-90rn (Kotre- Omission of Seam Ill in CMB-61, Omissionblocks in the South Basantpur) of Seam VIIIB in CMB-62, Omission ofregion of CMPM- Westerly 0-60m (Pachmo) Seam IX to VIIIB in WBKB-15.22,2, 24, 18 & 20

F7c Runs in northern . Almost E-W to Westerly to 40-?0m (Kotre- 1. Encountered in CMB-77 at 177m.part, parallel to NW-SE South Basantpur) 2.Strata between Barren Measure andF6, abuts with westerly 20-40 m (Pachmo) Seam VIII missing in CMB-79fault F1 (CMPM 3. Based on stratum contours25)

F8.b Runs in South Almost NW-SE South- 35-40m 1. Seam VII Top to VII Bottom missing inEastern part and Westerly CMB-24.abuts on either 2.Seam II and Ill missing in CMB-59sides with faults Based on stratum contours.F3 and F14.

F10.b Runs in the Almost-NW-SE South- 0-4m Seam VII Top, VII Bottom & VI missing innorthern part Westerly CMB-63 & Omission of Seam II in CMB-13.

Kedia E-W Northerly I '100m 1. Presence of Seam X and BarrenFault Measure in CMK-119 & CMK-135 against

kb Lower strata of Kedia Block.2. Absence of rock exposure in ChutuaNala.

•

Note: Fe: Common fault lying in Kotre-Basantpur and Pachmo block.FKs: Fault lying in KotroBasantpur,Fp: Fault lying in Pachmo

6.2.2 Presence of in-seam band seam-wise (numbers and thickness of each band, total bandthickness)

All the seams of the prorectised area are inter-banded in nature. The bands 1m and less in

thickness occur in very small isolated pockets and will not be possible to remove them separately

Job No. 3417145

while quarrying and such has not been excluded from the reserve estim~bon. The dirt ba ds are

mostly carbonaceous shale in nature. . ~\,,v\,~

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The details of combustible and non-combustible dirt bands having thickness up to 1 m (ash above

50%) present within the coal seam are given below:In - Seam Band (Seam wise)

Coal Seam No. of dirt Cum. Th. of dirt % of dirt bands toband bands (m) seam thickness

XIII 0-1 0-0.16 0-6.5

XII 0 0 0XI 1-4 0-0.60 0-10

X 1-2 0-0.94 2-14

IX 0-3 0-0.83 0-29.1

VIIIC 0-1 0.20-0.25 17.8-27.5VIII B 0-1 0.05-0.36 4.6-19.4VIII A 0-1 0-0.37 13.7-25.6VIII 2-3 0-1.37 0-24.3VINII 1-3 0.14-1.05 2.7-14.6

VA 1-6 0-0.57 0-5

V 1-3 0.04-0.66 1.4-12IV 1-2 0.30-0.50 2.1-12.2111 0-3 0-0.69 0-18.8IIA 1-5 0.11-0.66 2.4-22.0II Top 2-3 0.18-0.29 5.4-13.2II Bot 1-8 0.05-1.54 5.1-29.6

II 2-5 0.60-1.50 18-30

6.2.3 Sequence of coal seam and parting

The details of sequence of coal seam with partings are given in the following table.

Seam Sequence

Seam Name/Thickness Range Average(m)

Parting From ToThickness (m)

Soil 3.00 24.40 11.25Top OB 1.65 45.62 16.11Seam XIII 0.45 4.71 2.45Parting XIII - XII 2.31 31.20 10.23Seam XII 0.25 3.94 1.97Parting XII - XI 28.79 67.05 43.67Seam XI 2.48 6.38 3.96Parting XI - X 24.09 49.79 36.02SeamX 0.45 6.63 4.31Parting X - IX 10.34 51.36 20.97Seam IX 0.13 2.88 1.62

\ / / - - . -Ur...- ... 11 -Job No. 3417145 52 ~'\)""JU PRc:F.Pet~ ,,1-.;1~ 1lfhrt . ' . ICE


Ji

Seam Name/ Thickness RangeAverage(m)

PartingFrom To Thickness (m)

Partina IX - VIII C 4.80 25.66 19.12Seam VIII C 0.26 2.14 0.93Partinq VIII C - VIII B 7.00 32.82 22.26-··----··-·· - -··Seam VIII B 0.12 1.85 0.97Parting VIII B - VIII A 3.27 17.21 10.62Seam VIII A 0.15 1.60 0.86Parting VIII A - VIII 4.32. 28.89 16.65Seam VIII 0.59 4.65 2.26Partin.a VIII - VIN/I 32.11 63.68 50.05Seam VIN/I 3.28 9.66 6.59Partina VIN/I - VA 1.04 5.53 2.13Seam VA 0.98 9.03 4.37Partina VA - V 5.49 39.94 20.22Seam V 0.66 9.65 5.20Partinq V - IV 4.97 25.95 14.16Seam IV 0.25 8.39 4.62Partinq IV - Ill 2.40 39.44 22.48Seam Ill 0.09 8.17 3.20Parting Ill - /IA 11.~0 30.9_0 17.74Seam /IA 0.10 4.80 2.30Parting /IA - II Top 4.71 13.90 9.81

-··Seam II Top 0,71 3.33 2.01Partina II Top - II Bot 0.62 7.66 2.75Seam II Bot 0.97 5.20 2.64Partinq Ill - II 9.35 37.93 22.10Seam. II 0.10 12.45 4.85

,·)

•6.3 MINE PARAMETERS

Some of the important final stage mine parameters are given below:

Final Stage Mine Parameters •Parameters Unit Minimum Maximum

Dimensions of the quarry m 800 5500along strike (on floor)Depth of quarry m 10 285

~~

1 Ofp rise fength (on floor) m 500 1200Final Quarry Floor area km2 3.993 (7Final Quarry Surface area km2 6.485 ~Mineable reserves (Mte) 153.63Total 08 (Mcum) 734.53 ~ ur'" i orf'Average Stripping Ratio (cumit) 4.78 ""'t).'l~c ~'f''Y"- ' .

- . l

Job No. 3417145 53

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(\.'\!0'


6.4 e/-;.. l~n 1-·r 8° -:;_. 1 ·, Tl 3

Considering the geo-mining conditions of the Kotre Basantpur Pach mo OCP viz.

(i) Gradient of seam floor, viz., 8° - 18" in Kotre-Basantpur & 8° - 25° i1 Pachmo bbck

CHOICE OF TECHNOLOGY:

(ii) Multiple seams with variable thickness and

(iii) Smooth, flexible and easy operationShovel-dumper combination has been proposed for mining the quarry. Other technologies like

Dragline, Bucket Wheel Excavator, Surface miners are ruled out under the given geo-mining

condition. The reason for not selecting these technologies is given below. ..,

Application of DraglineThe application of drag line is ruled out due to the following technical reasons:

(i) The mine has steep gradient unsuitable of dragline application.

(ii) Annual workload of OB and the thickness of parting between the bottommost two coal

seams do not justify the application of dragline.

Application of Bucket Wheel ExcavatorThe application of Bucket Wheel Excavator is ruled out due to the following technical reasons:

(i) The Bucket Wheel Excavator is suitable for excavating loose soil and lignite deposits.

(ii) The mine has very steep gradient unsuitable of BWE application.

Application of Surface MinersThe application of surface miner is ruled out due to the following technical reason:

(i) The mine has large number of faults unsuitable for surface miner application.

(ii) The mine has multi-seam working with low annual workload of coal making it unsuitable for

surface miner application.

Deployment of smaller dump truckSmaller size dump trucks (such as 35T) have not been considered for deployment for the

following reasons:(i) Smaller size trucks will need smaller loading shovels. But this will increase total fleet.

(ii) Large fleet will create problem in operation, maintenance and traffic management.

(iii) Number of operators will increase which will adversely affect OMS.

)

6.5 EQUIPMENT SELECTION

The following selection criteria have been considered for selecting the size and type of the

equipment: ~-v\'t\1. The strike length of the mine, ~'

.., qA4hHI 3'~<t>l.flPROJECT OFFICER2. Annual rate of advance,

Job No. 3417145 54 ¥ffi7 tf~.~~r.M591 ~Ki··;, E, faasantp:!r '"'!tct1sr:o Coal Mine

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3. Total volume of overburden and coal to be handled annually,

4. The individual thickness of coal seam and partings,

5. The gee-mining condition of the mine,

6. The type of mining system.

7. The economics of the mine

Based on the above selection criteria, 10-12 cum diesel hydraulic shovel with 100T rear

dumper (RD) and 5.5-6.5 cum diesel hydraulic shovel with 60T RD are proposed for removal of

top OB and partings. Coal production will be carried out by deploying 5.5-6.5 cum diesel

hydraulic shovel / 4.3-5.0 cum diesel hydraulic backhoe with 60T RD combination. In case coal

- and OB occur in any particular bench excavators deployed in that bench will take both. This will

also help in reducing unnecessary movement of shovel. Dozer with ripper attachments is

provided to handle dirt bands and very thin coal seams. Details of the dirt band in each seam

have been addressed in para 6.2.2.

The proposed place of deployment (in which partings, seams, etc.) of the selected equipment is

given below.

Mining Method for Overburden RemovalThe OB benches along with major partings are proposed to be taken using two different shovel

dumper configurations. The top OB and thick partings are proposed to be excavated by 10-12

cum diesel hydraulic shovel with 1 OOT RD. Thinner partings are proposed to be excavated by

5.5-6.5cum diesel hydraulic shovels with 60T RD. For the estimation of the dumper population,

the lead for OB transportation has been considered for each year and for each bench.

Mining Method for Coal Winning

For coal production, 5.5-6.5 cum diesel hydraulic shovel and 4.3-5.0 cum diesel hydraulic

backhoe with 60T RD have been proposed. However, in thick coal seams, 10-12cum hydraulic

shovels in conjunction with 100T RD will have to be utilised. This type of shovel will be shared

from the HEMM provided for OB removal. Separate provision of this type of shovel and

dumper has not been shown in coal production HEMM schedule. The balance capacity of 5.5-

6.5 cum Hydraulic shovel shown in coal HEMM schedule will be utilised in OB removal.

Provision of Dozer with ripper attachment has been made in the report to minimize mixing of

•••

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,· '

coal with OB where the parting gets reduced. It will also be useful in faulted area as well as_U ·~temporary sump formation in horizontal slicing method. For the estimation of the dumper'S 1.ft:.f' tpopulation, the lead for coal transportation has been considered for each year--~a~ f

seam. Two (2) FE Loader has also been provided in common category for diffi .~t:Ri};Q£F~!t.::n _·-.rec)llx '\f,:ti . .

operations. Diesel hydraulic backhoe shovels of smaller capacities are proPR · i IDt§~oRct~rn~~a~ (~- e~0~o~o. . ..

,... C.l .. Ranch~Job No. 3417145 55 Rl-3~tMPDI

-•Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL

handle thin partings and dirt bands. Productivity of the dozers, FE loader and backhoe provided

in common category has not been considered while calculating the capacity requirement of

HEMM for the mine.As both outsourcing and departmental mode of operation is running in this area two variants

each for complete departmental and complete outsourcing mode have been envisaged in this

report.

Variant-I · In Variant-I, coal production and OB removal is envisaged to be done by

departmental means. In this Variant ROM coal will be crushed to (-) 100 mm by primary and

secondary sizers to be deployed at south western part of the mine initially (first 10-12 years).

Afterwards, in-pit crushing to(-) 100 mm will be done from two distinct levels within the quarry

and coal will be conveyed from the quarry by application of High angle conveyor systems to the

nearby existing/upcoming washery.

Variant-II • The Variant-II proposes complete outsourcing of coal production and OB removal. It

also proposes outsourcing pumping and CHP (including in-pit crushing, application of HACs).

6.6 MINING SYSTEM & SYSTEM PARAMETERS

As the seams are steeply dipping, the mine will follow horizontal slicing method. The mining

system has been depicted in the cross section of the mine.

The following mining parameters have been considered in the project.

SI. No. Particular Unit Value_. .__. -

1 OB Bench Height for 10-12 cum shovels m 10-12

2 OB Bench Height for 5.5-6.5 cum shovels m 8-10

3 Coal Bench Height for 10-12 cum shovels m· 10-12

4 Coal Bench Height for 5.5-6.5/4.3-5.0 cum shovels m 8-10

5 Working bench width m 40

6 Non - Working bench width m 25

7 Bench Slope for OB and coal Deg 70

8 Blast Hole dia for OB and coal mm 250/160

9 Powder Factor in OB and coal Kg/cum 0.3-0.4 & 0.2

Job No. 3417145 56

•

1)

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...Project Report for Kotre Basantpur Pachrno OCP (5.0MTY), CCL

CHAPTER-VIIMINING & DUMPING STRATEGY

7.1 CONSTRAINTS ON MINE DEVELOPMENT

Kotre Basantpur Pachmo OCP is a virgin mine. The block is covered by forest and non-forest

land. The area north of the block is marked by metamorphic, whereas, that in - the west by

Barren Measures. The topography of the area is more or less gently undulating and a number

of seasonal nalas (Kotre, Jhumra, Pachmo and Baghraiya) emerge from the high range

(Hazaribagh plateau) which flow towards south through the mining area and meets west to east

flowing Chutua nala and Baghlata nala. Flow of water from these nalas, into the mining area

needs to be arrested by constructing and maintaining garland drains along the quarry periphery

and diverting these water courses.

The projcetised area is structurally complicated having a total of 11 major faults (throw varying

from 0-300m). The gradient of the strata is quite steep which varies from 8deg to 25deg.

However in major part the dip is Sdeg to 18deg.

A huge quantity of OB will be generated during mining. With steep gradient of the strata,

concurrent internal dumping will be hugely restricted. A large area for external OB dump will be

required. The only available place for OB dump is in the metamorphic, to the north of Kotre

Basantpur block. However the area is mostly covered by forest land. The topography of the

area available for OB dump is hilly (RL gradually increases from 360m in the south to 41 Om in

the north) thereby restricting OB accommodation.

West to east flowing Chutua nala, a major tributary of Bokaro River, passes along the southern

quarry boundary. The quarry needs to be properly safeguarded from inrush of water by

constructing suitable embankment along the Chutua nala. A provision for a stretch of about 2

km embankment against the nala is being proposed.

7.2 MINING STRATEGY/ MINING SEQUENCE

'-::_·

First three years mine operation will be dedicated to the land acquisition and construction

purposes. All the activities related to mine development would be carried out in this period.

Total sixteen numbers of seams from Seam XIII to II are occurring in the proposed area with

gradient varying from 8° to 2so. Seam II has split into II Top and II Bottom in the eastern part of

the quarry (in Pachmo Block). The gradient of the coal seams in the considered proposal is

8deg to 18deg with little scope of concurrent backfilling. This would result in requirement of

~~rv'\~4)GFH 3l~cbl.fi~PROJECT OFFICER

Job No. 3417145 57 -.)m~Mfl!W ~ lfTt~l<.Wi Sasantpur Pachm2 Coal Mine

-q:ft'~~flo~o. ~C.C.l .. Ranchi

. 50m), huge internal dumping space will be created as this fault may act as the toe of~"})

internal OB dump in the quarry floor. ~~~ ff'CER

The quarry wi!! be able to achieve its rated production of 5.00 MTY by the end\fi)~to~jr;{l'O ~(7th year ~f mine life). The mine will be able to sustain the rated production 1~m.r~~~cnm~ C:031

~otre 5as


huge external dump area if coal and OB benches are formed along strike. The area

surrounding the proposed opencast are as follows:

i) coal bearing in the south with presence of a major nala (Chutua nala),

ii) non-CIL coal blocks in the east (Lalgarh North and South blocks),

iii) Kedia Washery and upcoming Tapin Washery in the west,

iv) Although the area to the north of the quarry is marked by metamorphic but it has hilly

terrain due to Jhumra pahar in the east.

So the only non-coal bearing area available is in the northern part of the quarry which is mostly ·

covered by forest land. Even this area will be insufficient to accommodate the external OB

dump requirement of the quarry, if coal and OB benches are formed along strike.

To overcome this difficulty it is proposed that the benches are formed along dip and concurrent

backfilling may be started as soon as a portion of the mine reaches its dip side boundary limit.

This may facilitate minimum external dumping. The overburden of the initial period is bound to

be dumped externally. Initial dumping of OB is being proposed to be done in north-west of the

quarry in the metamorphic (mostly forest land) which is adjacent to the top edge of the .

proposed quarry. Subsequently OB will be dumped in the further north of the OCP.

Mining operation will start from 41h year from the incrop of Seam-II on the western side of the

quarry near CMB-19 and CMB-20. It will touch the floor of Seam-II at two different RL of 360 inand 340 m due to presence of Fault F4 (southerly throw of 30m). During initial years of mine

operation, benches will be formed along dip and also along strike. Benches along strike is

proposed to be used to extend the portion of the mine along dip to reach ultimate dip side

boundary to facilitate internal dumping at the earliest. The benches along dip would be used for

future production of the mine with concurrent backfilling.

The quarry will gradually advance in rise to dip from north to south. direction. The quarry is

proposed to reach its dip most side (southern side) in the initial 12 years of mining operation.

By the end of 12 years (excluding construction period), the quarry will attain its maximum depth

of about 285m. Thereafter, it will move latera!!y along strike and will go towards Pachmo side

(in the east).Once the quarry floor crosses the fault F5 (trending NW-SE, having south-westerly throw of 30-

years.Job No. 3417145 58 Rl-3, CMPDI

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Calendar Plan for production of coal vis-a-vis OB is given in Chapter VIII.

In the initial years, the coal will be transported by Rear Dumpers to the surface using the south

batter roads and the OB will be sent to the External Dump using the north batter roads. The

quarry floor will reach the southernmost side by 11-12 years. By this period, the entire external

OB Dump area will be filled with three decks of 30m each (at an overall slope of 24° - 28°).

Henceforth, the entire western part of the quarry (leaving about 60-1 OOm barrier from the

eastern advancing coal faces) will be available for internal dumping. To make way for safe and

stable internal dump, the area over the southern side batter _will also needs to be packed. Now

coal transportation to surface from the southern batter of coal will be stalled. This will entail

introduction of High Angle Conveyors and in-pit crushing from this point.

Thus from 13th year onwards, coal will be transported by High Angle Conveyors after in-pit

crushing. For this, two sets of in-pit crusher.and HAC is being proposed at two distinct horizons

(at 120m and 240m). The existing batter roads will be utilised for the purpose. The complete

system will be advanced every 4-5 years. The set at 120m level will be able to handle 3-4 MT

of ROM coal, while the set at 240m will need to handle 1-2 MT of ROM coal. Coal from the

quarry is coking coal with average grade falling in Washery Grade-IV category.

The entire OB will now be dumped in the internal dump and no further external dump will be

required. The various levels of internal dump wlll be accessed from the respective noor

contours and batter roads. The haul road layout of the mine has been shown in different stage

plans prepared for the purpose. The width of the working and non-working benches has been

kept at 40m and 25m throughout the life of the mine except first few years.

7.3 DUMPING STRATEGY

As explained in preceding paragraphs, it can be seen that OB dumping is a critical factor in

development of this mine. The dumping strategy has been formulated with due consideration of

the following aspect:

1. Minimal use of the land for external dumping

2. Rationalization of the lead distance for hauling

3. Stability of the dump both internal and external, which ultimately leads to the safety of the

person working in the mine.

Based on the above criteria the following dumping strategy has been adopted:

Initial dumping of OB is being proposed to be done in north-west of the quarry in the

metamorphic (mostly forest land) which is adjacent to the top edge of the proposed quarry.

Subsequently OB will be dumped in the further north of the OCP.

Job No. 3417145 59

Project Report for Kotre Basantpur Pachmo OCP (5.0MTY), CCL)

A part of the strata in the incrop side is little flatter as compared to the rest of the property. This

will allow concurrent internal dumping during the initial years. Part internal OB dumping will

start in the third year where the strata (floor of Seam-II) is flatter (about 8-1 Odeg) which will

continue till fifth year. The external dump will be flushed with the internal dump.

Afterwards, internal dumping needs to be stopped due to steep floor gradient. The entire OB

from the quarry will be placed in the External OB Dump till about 12 years of quarry operation.

By this period, the entire external OB Dump area will be filled with three decks of 30m each (at

an overall slope of 24° - 28°).

Henceforth, the entire western part of the quarry (leaving about 60-100m barrier from the

eastern advancing coal faces) will be available for internal dumping. To make way for safe and

stable internal dump, the area over the southern side batter will also needs to be packed.

Maximum height of top most level of dump (external as well as internal) has been kept 60m

above immediate ground level.

About 30% of OB needs to be dumped externally. About 380.39 Ha (including 362.38 Ha of

forest land) additional land will be required for the same.

The details of external OB dumps is given below:

r•I,•

Dump Volume Top RL Average height from(MCum) (m) surface (m)

External 218.42 +480 90Internal 516.11 +450 90Total 734.53 +480 90 •

To preserve top soil, top most level of the external dump has been proposed.

Year-wise external and internal dumping:The year wise loose volume of external and internal dumping in with reclamation is given in the

following table:

Year wise Internal & External Dump

Job No. 3417145 60 Rl-3, CMPDI

project report for kotre basantpur pachmo ocp (5.0mty

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