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Operating Ideas

Mines can’t function without pumps and pipework. Period. At the front end of an operation, dewatering is key to maintaining production, be it from underground or an open pit. By the time run-of-mine coal enters...
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Legally Speaking

From the Editor

Former Massey Energy Chairman and CEO Donald L. Blankenship was indicted during November. It didn’t make the cover of the Wall Street Journal, but word spread quickly through the coalfields, especially...
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Market Watch

By Neil Powell U.S. power generating units with co-firing or dual-switching capabilities experienced a decline in total gas burn of nearly 22% in 2013 year-over-year, but despite rising gas prices,...
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Transport Tips

By Charlotte Cox and Darren Epps, SNL Energy  Powder River Basin (PRB) coal deliveries in the upper Midwest declined during the first three months of the year compared to the previous two years...

Awards

Mine rescue teams from Alpha Natural Resources mines in West Virginia and Virginia have taken all three top placements at the 2014 Nationwide Coal Mine Rescue Skills Championship, held recently in...
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M-Class Mining Completes Slope Conveyor Installation


M-Class Mining recently installed two 84-inch slope conveyors at its Sugar Camp Energy underground coal mine in southern Illinois. Both of these conveyors are rated at 10,000 tons per hour (tph). The hardware supplied by Joy Mining Machinery. The Slope A conveyor, 3,480-ft long with a 475-ft vertical lift is powered by a 8,000-hp four pulley remote drive with a 150 hp constant tension vector winch electric take-up. The take-up is installed near the Slope A tail end which is half the distance from the surface to the coal seam.

 

The Slope B conveyor, 3,750-ft long with a 300-ft vertical lift is powered by a 6,000-hp four pulley remote drive with a 150 hp constant tension vector winch electric take-up. The take-up is located near the tail end in the coal seam. The Slope B conveyor discharges onto the Slope A conveyor midway down the mine slope at a 171˚ transfer angle.

Both slope conveyors include 72-inch diameter by 93-inch face width drive and discharge pulleys weighing up to 77,000 lb each. The take-up and tail pulleys are 60-inches in diameter with a 93-inch face width.

All of the surface conveyors at Sugar Camp Energy were also included in Joy’s scope of supply. The surface conveyors include an 84-inch wide raw coal stacker, a 60-inch plant feed conveyor, a 72-inch clean coal collecting conveyor and clean coal stacker conveyor, a 60-inch refuse collecting conveyor with 42-inch sub-refuse conveyors, and a 72-inch wide train load out conveyor. All of the surface conveyors have been operating since May 2010.

Conveyor systems for all underground operations are also part of this project and will be installed as mine plans are implemented.  Mainline conveyors will be 72 inch (183 cm) systems and longwall panel conveyors will be 60 inch (152 cm) systems.

Components for all conveying systems were manufactured at Joy’s plants in Winfield, Ala., and Salyersville, Ky.

Joy Mining Machinery, a subsidiary of Joy Global Inc., is a global leader in the development, manufacture, distribution and service of underground mining equipment for the extraction of coal and other bedded materials.