Mining tire managementMining tire management

Víctor Barrientos

CAP MINERIA – Cerro Negro Norte

Index

1.- Introduction

2.- Methodology

3.- Results

1.- Introduction

3.- Results

4.- Conclusions

Tires

The off-the-road (OTR) tire market is dominated by Michelin and

Bridgestone which support the mining operations at the best use

of tires

As general rules, Michelin/Bridgestone suggest for mining truckAs general rules, Michelin/Bridgestone suggest for mining truck

to use 1/3 of the life of tire in front positions and 2/3 in rear

positions

1/32/3� Maximizes tire performance (Manufacturer)

� Inventory for rear position tires

Index

1.- Introduction

2.- Methodology

3.- Results

2.- Methodology

3.- Results

4.- Conclusions

Job to be done

Clayton Christensen (Disruptive Innovation) creates this concept

Job to be done (JTBD) in not a product / service specific, but

rather: the greater purpose by which people buy products,

service and solutions

All job to be done (JTBD) must respond as follows:

1.- ¿What is the need?

2.- ¿Why does the need exist?

3.- ¿What is the context of this need?

Job to be done

1.- ¿What is the need?

Spend less tires with the minimum investment

2.- ¿Why does the need exist?

Due to the decrease in the sale price of its products, companyDue to the decrease in the sale price of its products, company

presents a financial contingengy situation

3.- ¿What is the context of this need?

In general, efforts are focused on tire performance loses the

focus it should be minimize tire spending

Change in objetive function

Maximize performance Minimize consumption

new tires new tires

Simulation is created that relates the frequency of rotation and

the consumption of new tires. Obtained as resultsthe consumption of new tires. Obtained as results

Rotation at 2.000 hrs Rotation at 2.600 hrs

1/3 2/5

Index

1.- Introduction

2.- Methodology

3.- Results3.- Results3.- Results

4.- Conclusions

3.- Results

15

20

25

30

Un

its

Inventory of used tires for rear positions

2000

0

5

10

15

0 12 24 36

Un

its

Months

2000

15

20

25

30

Un

its

Inventory of used tires for rear positions

2000

0

5

10

15

0 12 24 36

Un

its

Months

2000

2600

Initial

situation

New

scenario

Frequency of rotation 2.000 hrs 2.600 hrs

% of tires worn 70% >= 70%

Logistics time sent 10 – 15 days 2 – 3 days

Critical factors of success

Logistics time sent 10 – 15 days 2 – 3 days

Purchase order time 30 - 35 days 3 - 4 days

Total time 40 – 50 days 5 – 7 days

Used tires inventory (1-36 months) 23,6 un 8,8 un

Used tires inventory (12-36 months) 24,3 un 4,8 un

3224

28

32

36

40

44

48

52

56

Co

nsu

mp

tio

no

f n

ew

tir

es

Initiative impact

in n

ew

tir

es

(u

sd/h

rs)

32

24

0

4

8

12

16

20

24

2015 2016

Co

nsu

mp

tio

n

Años

Do

lla

rsp

er

ho

ur

in n

ew

tir

es

(

- 25%

32

58

39

30

40

50

60

70

24

28

32

36

40

44

48

52

56

Co

nsu

mp

tio

no

f n

ew

tir

es

Initiative impact

in n

ew

tir

es

(u

sd/h

rs)

- 33%

32

24

0

10

20

30

0

4

8

12

16

20

24

2015 2016

Co

nsu

mp

tio

n

Años

Do

lla

rsp

er

ho

ur

in n

ew

tir

es

(

- 25%

40

50

60

70

80

rub

be

r(m

illi

me

ters

)

Tire wear rate 46/90R57

Faena Y

Faena X

20

30

40

0 2.000 4.000 6.000 8.000 10.000

Re

ma

inin

gru

bb

er

Hours (hrs)

Faena X

40

50

60

70

80

rub

be

r(m

illi

me

ters

)

Tire wear rate 46/90R57

Faena Y

Faena X

20

30

40

0 2.000 4.000 6.000 8.000 10.000

Re

ma

inin

gru

bb

er

Hours (hrs)

Faena X

Index

1.- Introduction

2.- Methodology

3.- Results3.- Results

4.- Conclusions4.- Conclusions

Conclusions

� For the mining work under study the increase in rotation

frequency 2.000 to 2.600 hours allowed a 33% decrease in the

tire costs per hours (Simulations)

� To support this strategy requires a logistics dispatch and repair� To support this strategy requires a logistics dispatch and repair

of reduced time tires

� The times of quotation, approval purchase orders should be

equally reduced

Conclusions

� A fast tire repair system and a high percentage of scrap tires

due to wear are fundamental requirements for the

implementation of this strategy

� In the same way the efforts to improve the uses of the tires

must be given bymust be given by

� Operator awareness

� Pit conditions

� Tire maintenance

� Tire monitoring & management

� Top management support

¿Questions?¿Questions?