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Operating Ideas

By Dr. Fathi Habashi If organic chemistry is the chemistry of carbon, then ferrous metallurgy is the technology of carbon. Carbon in the form of coal is used in metallurgy as a fuel, but the major...
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From the Editor

The term “rock bottom” is often used to describe a great loss, such as financial ruin. Its derivation can be traced back to coal mining in the late 1800s as a description of the harder bedrock...
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Market Watch

By Andrew Moore This year will likely be remembered as the year the U.S. coal market hit bottom. Low demand led to low prices, which yielded production cutbacks, mine closures and some bankruptcies....
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Transport Tips

By Dave Gambrel The U.S. coal exporting community could not imagine a more perfect place than Cherry Point from which to export America’s cleanest coal, coal produced in the Powder River Basin (PRB)...

Awards

The Interstate Mining Compact Commission (IMCC) has handed down its 2016 National Reclamation Award to Alpha Natural Resources’ Paramont Coal for its work at the Hawks Nest surface reclamation...
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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.