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Wirtgen Surface Miner

Surface Mining TechnologyAn economic concept

for blast-free,highly selective Mining

Ulaanbaatar, Mongolia, 9th February 2012

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The Mining Conceptand

The Operating Method

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Slewing ringConveyor counterweight

Drive unit with diesel engine Operator‘s cabin

Slewing and height-adjustable

discharge conveyor

Height-adjustable crawler track

Scraper blade with primary conveyor

Mechanically driven cutting drum

Steered and height-adjustable crawler track

Working direction

A Surface Miner - here’s how it works

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Mining sequences

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Direct / indirect loading options

Sidecasting mode

Front loader from behind Rear loader-loading from the side

Windrowing mode

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Performance ranges

Unconfined compressive strength (UCS) of material in MPa (Mega pascal)

Bank

Cub

ic M

eter

(bm

³) p

er h

our

10 20 30 40 50 60 70 80 90 100 110 120

2200 SM – windrowing

2500 SM

2200 SM – conveyor loading

2200 SM / 3800 SM – Windrowing

4200 SM

Wirtgen product range

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The Applications for Surface Miners

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The following jobs are not longer required:

Cut, crush, load in one operation with one machine

Capabilities of Surface Miners

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• Environmentally friendly:- No dust generation- No noise or air overpressure- No ground vibrations

• Improved safety:- No explosives - No fly rocks

• Better exploitation:- Mining up to the tenementboundary

Mining without blasting

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PartingCoalPartingCoalParting

- High quality ROM-products- Reduced processing cost (less washing,

less crushing)- Reduced waste material handling- Better exploitation of deposit- Better stripping ratio

Highly-selective mining

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CoalPartingCoalParting

Highly-selective mining

- High quality ROM-products- Reduced processing cost (less washing,

less crushing)- Reduced waste material handling- Better exploitation of deposit- Better stripping ratio

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PartingCoalParting

Highly-selective mining

- High quality ROM-products- Reduced processing cost (less washing,

less crushing)- Reduced waste material handling- Better exploitation of deposit- Better stripping ratio

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CoalParting

Highly-selective mining

- High quality ROM-products- Reduced processing cost (less washing,

less crushing)- Reduced waste material handling- Better exploitation of deposit- Better stripping ratio

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Selective mining

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Blending by cutting on a slope

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Gradation in gypsum

Grain size distribution - limestone, gypsum, phosphate

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Steep and stable slope cutting

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Advantages: Small particles in constant flow do not harm truck bodies.No tire and chassis damages since trucks travel on even and solid ground.

Smooth truck loading

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Selective Mining of

Ligniteat

North American CoalRed Hills Mine, Mississippi

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Trial operation in Rio Tinto’s Iron Ore Pilbara Iron Ore Operation

Bench width: 56 mBench length: 800 m

Selective Mining of thin lignite seams

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Trial operation in Rio Tinto’s Iron Ore Pilbara Iron Ore Operation

No. of seams: 6Seam thickness: 0,6 to 2 mStripping ratio: 13:1

Selective Mining of upper two lignite seams

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Trial operation in Rio Tinto’s Iron Ore Pilbara Iron Ore Operation

Selective supervision – camera on Surface Miner

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Trial operation in Rio Tinto’s Iron Ore Pilbara Iron Ore OperationLoading 135 t in approx. 2:45 min = 2945 t/h

Continuous truck loading

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Trial operation in Rio Tinto’s Iron Ore Pilbara Iron Ore Operation

The Benefits at a glance:Highly selective mining of lignite and interburden

- High calorific ROM lignite- High exploitation = low stripping ratio

Production of minus 150 mm particle sizeCutting performance: 3.000 t/h

Wirtgen Surface Miner 4200 SM on the move

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(379 machines sold as per December 31, 2011)

Surface Miner application (by rock type)

Salt - 27 Machines

Coal - 86 Machines

Limestone - 156 Machines

Bauxite - 10 Machines

Caliche, Dolomite, Mudstone, Oilshale, Pegmatite, Shale, Tuff - 11 Machines (total)

Iron Ore - 49 Machines

Gypsum - 26 Machines

Phosphate - 5 Machines

Granite - 5 MachinesKimberlite - 4 Machines

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58Australia

133Asia

42 East Europe

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North Africa

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South Africa8

South America

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North America

51West Europe

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Central America

Surface Miner sold worldwide (as per Dec. 31, 2011)

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Conclusion

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Simple Mining (cut, crush, load in one operation)= Save Money (economic Mining= one machine for the entire job)= Sized Material production (no crushing)= Smooth Material flow (loading of common trucks) Selective MiningSafe Mining (no blasting)Sealed Mining (cutting drum entirely covered, no flying rock, no dust)Surface Manipulation (+ Even floor profiles for easy loading

+ Safe traffic ability+ Surface water drainage)

Slope Manipulation (precise, steep and stable slopes )

For optimisation of mining and processing Wirtgen Surface Miners offer the following benefits

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With our customers around the world

Thank you for your kind attention!