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JULY 2016
Informed and in-depth editorial on the world mining industry
www.im-mining.com
MININGENGINES
FUEL ANDFLUIDS
NARROW VEIN MINING
TAILINGS & WASTEMANAGEMENT
MINING TYRES
OPERATION FOCUS: Kamoa
IM COVER July 16_proof 21/06/2016 16:36 Page 1
34 International Mining | JULY 2016
PFL 10 as a size between the PFL 8 and the PFL 20.
The PFL 10 has a 2.5 t payload, 1.2 m3 bucket
capacity and a 90 kW BF6L914 Deutz engine, the
PFL 8 having a 69 kW Deutz BF4L914.
In terms of how it has adapted its machine
range to allow for operation in narrow vein
mining conditions, Managing Director Franz-Josef
Paus states: “Some of our vehicles for narrow
vein mining are equipped with a hydrostatic drive
and an articulated chassis for a safe driving at
small and rugged roads. And for a better operator
view Paus is using LED lightning systems. Of
course our standard safety features like
ROPS/FOPS cabins, fire-extinguisher systems etc
are included. Traditionally all our mining vehicles
are extremely robust for the special heavy duty
conditions found in underground mining. Another
issue in narrow veins is the critical mine
ventilation situation. Especially for this issue
Paus developed vehicles with hybrid or electric
drive trains with no or reduced exhausts. In
combination with the related heat and noise
reduction it improves the working conditions of
the miners and also operator safety and
performance.”
Sales Director Dieter Plagemann told IM that
for narrow vein applications, next to the Paus
LHDs PFL 8/PFL 8 E, PFL 10 and PFL 20 with
payloads between 1.5 and 4 t, an electric LHD PFL
15 E with a payload of 2.4 t is available. Also the
small Paus personnel carrier Minca 5.1 (<1.8 m)
for 5 persons or 1 t capacity was launched at the
Bauma show in Munich in April. The Minca 5.1 is
available with a diesel or hybrid or fully electric
drive train. Key users of Paus narrow vein
equipment include copper mines in Chile and
Peru as well as applications in Turkey.
Narrow vein in wider mine contextIt is also the case that most mines will utilise
several different mining methods at one site, of
which narrow vein is only one, with larger
equipment to carry out the development to get to
the narrow vein mining area in the first place.
The Yaramoko permit is owned by Roxgold Inc
and covers approximately 196 km2 in the Province
of Balé in southwestern Burkina Faso. The
property is located approximately 200 km
southwest from the capital city of Ouagadougou.
Yaramoko lies directly south of, and is contiguous
to, the Semafo Inc property hosting its flagship
Mana gold mine and lies within the Houndé
Greenstone Belt.
The mining work is being conducted by
contractor African Underground Mining Services
(AUMS) which is 50/50 owned by Barminco and
Ausdrill.
The underground mine is to be accessed by a
dual ramp system, via a single portal at the
bottom of a 23 m deep box cut. LHOS (including
up hole retreat in certain areas) is planned as the
main mining method, with a limited application
of cut and fill for the crown pillar mining. The
mine layout is based on 17 m sub-levels.
Standard longhole stopes two sub-levels in
height (34 m) and 25 m in strike length, will be
utilised to mine the narrow vein ore body. By
December 2018, AUMS says it will have delivered
17,100 m of jumbo development, 120,000 m of
specialised narrow-vein 64 mm longhole drilling,
and 460,000 t of ore. It is envisaged that
personnel on site will be increased to over 150 by
the end of this period.
The narrow vein work will use a Sandvik
DD311-30NV single boom jumbo for ore
development, plus a Sandvik LH307 LHD for
narrow vein haulage and a Sandvik DL311-5
longhole rig for blast hole boring up to 64 mm.
The main mining and development work aside
from narrow vein will use two Caterpillar R1700
LHDs and one Caterpillar R2900 LHD for
development and production loading, as well as
Atlas Copco MT6020 trucks for haulage; with a
Sandvik DD420-60 twin boom jumbo with 16/10
split feeds for the main development drilling.
New narrow vein solutions from GHHBy the end of 2016, GHH Fahrzeuge will release
the new LF-3 LHD with a payload of 3.5 t. The
machine is based on a well-proven design and
has now been updated to fulfil all the latest
standards. The machine is only 1.50 m wide and
is powered by a 70 kW Deutz air cooled D914L6
NARROW VEIN MINING
ISHIGAKI Company, Ltd. • Japan • www.ishigaki.co.jp • Tel. +81 (0) 3 3274 3518ISHIGAKI USA Ltd. • USA • Tel. +1 603 433 3334ISHIGAKI Europe GmbH • Germany • www.ishigaki.de • Tel. +49 (0) 911 3749 525ISHIGAKI Oceania Pty. Ltd. • Australia • www.ishigaki.com.au • Tel. +61 (0) 8 9248 4465
NARROW VEIN MINING_proof 21/06/2016 11:44 Page 3
Tier 3 compliant engine. Other engine options including water cooled
versions for high altitude applications will follow shortly. Despite its narrow
profile, the cabin GHH says features excellent ergonomics due to a large
footbox. GHH’s “bar-of-soap” design minimises impacts while the ultra-
high-cycle-fatigue steel frame design grants the longest possible service
life.
The company also now offers an innovative solution for driving (heading)
small tunnels. Doing this by conventional means in narrow vein mining
requires niches for material transfer as
well as passing of vehicles. Each
part of the drill and blast cycle
demands a different machine
with its own
carrier, which leads to a large fleet with high capital and operating cost.
Manoeuvering of equipment takes time and creates further inefficiencies.
This was the motivation to develop a highly efficient roadheading
excavator for small cross sections as little as 9 m2 in a joint project between
GHH Fahrzeuge and Hazemag Mining. Each of the sister companies
contributed with its long experience in their field of work. The machine is
designed for both mine development and tunneling (safety tunnels, hydro-
power and irrigation projects) in small drift cross sections. The HRE
combines all the machines for the entire drill and blast cycle in one and is
thus capable of drilling, charging, loading, clearing and support work,
including shotcrete. All required tools, such as the drifter and bucket, are
carried on the machine. The innovative kinematic concept with a QDS
permits an efficient operation of all attachments. During loading, the bucket
pushes the material on an active apron, that quickly feeds a robust chain
conveyor, and finally dumps the material eg onto a MK-A20 dump truck.
“Consequently, the HRE reduces machinery and personnel in the
underground environment, costly niches for passing of vehicles, total energy
consumption as well as emissions due to its electric drive. At the same time
utilisation of machinery may be drastically increased. The result is a
substantially higher heading performance at lower cost.” An animation is
available on www.ghh-fahrzeuge.com that shows the entire HRE working cycle.
The MUKI narrow vein familyPeru’s RESEMIN introduced the MUKI Front Face in October 2014 to fulfil the
demands of narrow vein mines. As tunnels no longer have to be as large,
these MUKIs with a width of 1.05 m can play a key role in the modernisation
of old mines where manual drilling methods were the only option.
Now the MUKI family has increased to three models (see image) – the
MUKI FF, a front face drilling rig for sections from 2.0 m height x 1.5 m width
up to 3.0 x 3.0 m; the MUKI LHP, a production long-hole rig in a pendulum
style with transverse displacement; and the MUKI LHBP, also a production
long-hole rig but with a boom style.
The MUKI Front Face has permitted mechanisation in narrow tunnel
development and the cut and fill mining method with up holes. RESEMIN
The new LF-3 LHD from GHHFahrzeuge which is beinglaunched this year
NARROW VEIN MINING
JULY 2016 | International Mining 35
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NARROW VEIN MINING_proof 21/06/2016 11:44 Page 4
36 International Mining | JULY 2016
CEO James Valenzuela told IM: “It’s worth
mentioning that the MUKI not only increases
productivity by drilling a 2.4 m hole in 40 seconds
as opposed to 7 minutes with traditional methods
but also improves safety as operators are well
protected under a ROPS and FOPS compliant
canopy; no longer being exposed to the common
hazards of falling or rocks, debris, etc.”
Both the MUKI LHP and MUKI LHBP are
intended for long hole production in narrow vein
mining with excavations as small as 2.5 x 2.5 m
by drilling parallel holes up to 12 m length, and
51 or 64 mm diameter. This is a common drilling
pattern for narrow vein mining between 0.3 and
1.5 m width.
“The key advantage of MUKI is that it can work
where others can’t do it due to its width of 1.05
m; this characteristic allows engineering
departments to develop many options to mechanise
narrow vein mining by looking always for a lower
production cost by increasing productivity. It is a
fact that MUKI is modifying the status quo in
narrow vein mining. Now there are MUKIs
working in Peru, Mexico, Bolivia, Colombia,
Guatemala, Brazil and Australia. Companies like
Endeavour Mining, Pan American Silver, Kappes
Associates, Kollpa, Cia de Minas Buenaventura,
Cahecomi and Pybar Mining, between
others, have MUKIs in their
operations.”
Narrow vein depositmodellingThe Maptek Vulcan toolbox has been
customised using Lava scripting to
create a short term modelling process
for narrow vein mining, freeing up
time for other work. A recent case
study by Maptek with input from
Anthony Bottrill, Senior Resource
Geologist with Klondex Mines
outlined this application in detail.
Klondex Mines specialises in
narrow vein gold and silver deposits. It operates
the Midas mine and an ongoing bulk sampling
program at the high grade Fire Creek project in
Nevada. Klondex recently purchased the Rice
Lake mine in Manitoba.
Maptek states: “In the highly dynamic
environment of narrow vein mining, vein
characteristics and grade can change rapidly.
Local resource models rapidly become outdated
as information is collected from drifting along
veins. Short term modelling requires vein models
to be rebuilt regularly. Monthly rebuilds fit the
reconciliation and short term planning cycles,
and lead to better quality resource models and
long term planning.”
NARROW VEIN MINING
Graphic showing MUKI variants and overalldimensions
Visit us at MINExpo 2016 Central Hall, Booth 6085
The Umbrella of Mine Safety
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Delivering the Support You Need
NARROW VEIN MINING_proof 21/06/2016 11:44 Page 5
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