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Operating Ideas

Mining is an industry that deals in, and appreciates, large numbers. Big mines, for example, routinely rack up hefty equipment purchase, operating and maintenance costs, and hopefully, sizable...
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From the Editor

The coal market may be starting to finally turn the corner. Prices for some seaborne coking coals shipping from Australia to Japan have eclipsed the $200/ton level again (See World News)....
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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

Sentinels of Safety Awards Honors 19 • Arch Coal Earn NIOSH Awards
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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.