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Operating Ideas

By Donna Schmidt, Field Editor It’s a mission by every mine: mine coal faster, more efficiently, with less effort. Thanks to a meeting of minds between Alpha Coal West, Wyoming Machinery Co. and...
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Legally Speaking

By Erik M. Dullea and Penny Ann Lieberman The Worker Adjustment and Retraining Notification Act (WARN) was enacted in 1988. While the law and its regulations have not changed significantly since then, there...
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From the Editor

The late June decision by the U.S. Supreme Court revealed just how reckless the Environmental Protection Agency (EPA) has become. In Michigan v. EPA (See News, p.4), several states and industry...
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Market Watch

By Molly Christian and Neil Powell, SNL Energy An SNL Energy analysis shows that 75% of coal deliveries to surviving plants come from the Powder River Basin (PRB), Illinois Basin (ILB) and Northern...
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Transport Tips

By Dave Gambrel This is a brief review of shipping issues of immediate interest. For example, there is a focus on the Panama Canal Authority’s (ACP) definition of New Panamax. ACP does not use the...

Awards

Cloud Peak Energy’s Cordero Rojo mine, located near Gillette, Wyoming, received the 2015 State of Wyoming Reclamation Award from the Wyoming Department of Environmental Quality, Land Quality...
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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.