HIGH WALL MINING HIGH WALL MINING TECHNOLOGYTECHNOLOGY

HIGH WALL MINING HIGH WALL MINING TECHNOLOGYTECHNOLOGY

VenkatVenkat

History

• Based on 1980 USA/Netherlands design for low Based on 1980 USA/Netherlands design for low seam contour mining.seam contour mining.

• Superior Highwall Miners commenced Superior Highwall Miners commenced production of current models in 1994.production of current models in 1994.

• 15 Acre production facility in Beckley – West 15 Acre production facility in Beckley – West Virginia USAVirginia USA

• 34 Miners operating in the USA, 4 in Siberia 34 Miners operating in the USA, 4 in Siberia early 2005early 2005

• Committed to entering Indian market. Committed to entering Indian market.

Dimensions

• Length base approx. 22 metersLength base approx. 22 meters

• Width base approx. 8.3 meters Width base approx. 8.3 meters

• Weight base approx. 160 tonnesWeight base approx. 160 tonnes

• Length of push beams – 6 meters Length of push beams – 6 meters – 6 tonnes each– 6 tonnes each

• 50 push beams per miner 50 push beams per miner

• Max. force in: approx. 170 tonnes, Max. force in: approx. 170 tonnes, out: approx. 350 tonnes.out: approx. 350 tonnes.

Cutterhead

• Interchangeable, for seams Interchangeable, for seams 0.8 to 5.0 meters0.8 to 5.0 meters

• Width 2.9 to 3.5 metresWidth 2.9 to 3.5 metres

• Automatically following seam Automatically following seam contour contour

Push beams

• Front loader loads into magazineFront loader loads into magazine

• Every 6 meter new push beam is Every 6 meter new push beam is inserted by PTMinserted by PTM

• Operator checks latching and Operator checks latching and inserts lock pins inserts lock pins

• Augers connect by striker plates Augers connect by striker plates

Reel and Chain

• Power chain forPower chain for

• Electrical cables for cutter Electrical cables for cutter

• Hydraulic lines for shearHydraulic lines for shear

• Cooling water lines for cutter motorsCooling water lines for cutter motors

• Methane sensor cableMethane sensor cable

• Control cableControl cable

• Hoses protected by steel plates and linksHoses protected by steel plates and links

• Hose chain approximately 330 metersHose chain approximately 330 meters

• Automatically unwinds/winds into/from Automatically unwinds/winds into/from channel on channel on push beam

Tracks

• 4 Hydraulically powered tracks 4 Hydraulically powered tracks articulate 90 degrees for straight and articulate 90 degrees for straight and cross travelcross travel

• Circle mode for accurate headingCircle mode for accurate heading

• Each track 1 meter vertical movement Each track 1 meter vertical movement for adjusting seam dip and floor contourfor adjusting seam dip and floor contour

• Turning of each track is achieved Turning of each track is achieved automaticallyautomatically

Anchoring

Controls

• Operated from the cabin by touch screen technology

• Automatic shearing, various options

• Automatic sumping, various options

• Straight holes due to rigid string in horizontal direction

• Follows layers due to flexibility in vertical direction

• Accurate heading is important to ensure parallel cuts

Controls

Mobility

• Public road transport: Operational within three days excluding travelling time.

• Optional: Machine movers for longer hauls, fully assembled

Example:During 9 months SHM-20 was moved to 7 different mining pits - some moves over 6 kilometers in distance

WHERE THE TECHNOLOGY CAN BE APPLIED

1. Thin Seams2. Beyond Strip Limit3. Coal Blocked in Boundaries

• Previously Augered Area’s• Spoils, Roads, Power Lines• Villages

Methods of Mining

• Contour Mining Contour Mining • Finished Open Cut MiningFinished Open Cut Mining

• Trench Mining Trench Mining

Trench Mining

• Trench mining application at Trench mining application at Arch Coal’s Samples MineArch Coal’s Samples Mine

• Underneath sandstone channel Underneath sandstone channel and spoilsand spoils

• Trench measures 700 meters in Trench measures 700 meters in length and averages 45 meters length and averages 45 meters in widthin width

• Multiple seam operation Multiple seam operation

Production

• Penetration 300 metersPenetration 300 meters

• Dip of up to 15 degreesDip of up to 15 degrees

• Monthly production typically Monthly production typically around 100,000 tonnesaround 100,000 tonnes

• Operates with a 3 / 4 man crew Operates with a 3 / 4 man crew

• Up to 70% recovery, subject to Up to 70% recovery, subject to

- Coal compression resistance- Coal compression resistance

- Overburden load- Overburden load

- Seam height / Pillar stability- Seam height / Pillar stability

Recovery Rate SHM vs Auger

300 m = 100% 150 m= 50%

60% 30%

SHM 60%

Auger 15% 4x

SHM Auger

THE STRENGTH OF TECHNOLOGY

• No ash dilution No ash dilution • Wet coalWet coal• Very high up-timeVery high up-time• Only crew of fourOnly crew of four• Stacking Pushbeams saves spaceStacking Pushbeams saves space• Narrow bench or trenchNarrow bench or trench• Free travellingFree travelling• Quickly to relocate mine to mineQuickly to relocate mine to mine• Less capital than undergroundLess capital than underground• All spares on stockAll spares on stock• Internationally Trained Operator & service crewInternationally Trained Operator & service crew• Short delivery timesShort delivery times

• APPROVAL OF TECHNOLOGY AND MINING METHODS FROM APPROVAL OF TECHNOLOGY AND MINING METHODS FROM DGMSDGMS

• SUPPLY OF EQUIPMENTSUPPLY OF EQUIPMENT

• APPROVAL OF EQUIPMENT FROM DGMSAPPROVAL OF EQUIPMENT FROM DGMS

• OPERATIONSOPERATIONS

• MAINTENANCE OF EQUIPMENTSMAINTENANCE OF EQUIPMENTS

• ENSURE PRODUCTION GUARANTEE ENSURE PRODUCTION GUARANTEE

• UNDERTAKE SCIENTIFIC STUDY TO ENHANCE % OF UNDERTAKE SCIENTIFIC STUDY TO ENHANCE % OF RECOVERYRECOVERY

SCOPE OF WORK OF SHM

• TO PROVIDE GEO-TECHNICAL & GEO-MECHANICAL DATA OF TO PROVIDE GEO-TECHNICAL & GEO-MECHANICAL DATA OF THE MINETHE MINE

• TO PROVIDE POWER SOURCE TO PROVIDE POWER SOURCE

• TO PROVIDE THE BENCHES REQUIRED FOR HIGHWALL TO PROVIDE THE BENCHES REQUIRED FOR HIGHWALL MININGMINING

• TO TRANSPORT COAL FROM COAL-FACE TO SIDINGTO TRANSPORT COAL FROM COAL-FACE TO SIDING

• TO ARRANGE FILLING MATERIALS TO ARRANGE FILLING MATERIALS

• TO PROVIDE LAND AND SITE ACCESSABILITYTO PROVIDE LAND AND SITE ACCESSABILITY

SCOPE OF WORK OF OWNER

• TO OBTAIN PERMISSION FROM DGMSTO OBTAIN PERMISSION FROM DGMS

• TO MAXIMISE % OF RECOVERYTO MAXIMISE % OF RECOVERY

• TO DEVELOP ALTERNATIVE COST EFFECTIVE TECHNOLOGY TO DEVELOP ALTERNATIVE COST EFFECTIVE TECHNOLOGY FOR LONG TERM STABILITY SO FAR SUBSIDANCE IS FOR LONG TERM STABILITY SO FAR SUBSIDANCE IS CONCERNEDCONCERNED

• TO FORMULATE A MATHEMETICAL MODEL TAKING INTO TO FORMULATE A MATHEMETICAL MODEL TAKING INTO CONSIDERATION OF PANEL WIDTH, PANEL BARRIER , SEAM CONSIDERATION OF PANEL WIDTH, PANEL BARRIER , SEAM THICKNESS, OB HEIGHT, & COAL STRENGTH.THICKNESS, OB HEIGHT, & COAL STRENGTH.

SCIENTIFIC STUDIES

• COAL WHICH IS BLOCKED / LOST EITHER IN HIGHWALL OR COAL WHICH IS BLOCKED / LOST EITHER IN HIGHWALL OR BARRIERS CAN BE RECOVERED AT REASONABLE COSTBARRIERS CAN BE RECOVERED AT REASONABLE COST

• MAXIMUM CONSERVATION OF COALMAXIMUM CONSERVATION OF COAL

• EXTRACTION OF COAL @ 0.7 TO 0.8 MILLION TON PER YEAR EXTRACTION OF COAL @ 0.7 TO 0.8 MILLION TON PER YEAR CAN BE ACHIEVED IN ADDITION TO EXISTING PRODUCTION FOR CAN BE ACHIEVED IN ADDITION TO EXISTING PRODUCTION FOR ANOTHER 8 TO 10 YEARSANOTHER 8 TO 10 YEARS

• OPERATION OF MACHINE CAN BE PHASED WITHOUT OPERATION OF MACHINE CAN BE PHASED WITHOUT OVERLAPPING EXISTING OPEN CUT OPERATIONOVERLAPPING EXISTING OPEN CUT OPERATION

• EXTRA PROFIT PER YEAR WITHOUT ANY ADDITIONAL EXTRA PROFIT PER YEAR WITHOUT ANY ADDITIONAL FINANCIAL INVESTMENT .FINANCIAL INVESTMENT .

WHAT BENEFIT THE TECHNOLOGY CAN BRING