Evaluation of the Kloswall Longwall Mining System.
NTIS: PB/80-227622 :211 pages
This report presents the results of evaluating a longwall mining system specifically designed to extract a very deep web (60 inches or deeper) from a longwall panel. The report includes a productivity and cost analysis comparing the new mining system with a high-capacity conventional longwall operation taking a 30-inch- wide web. The analysis shows the new system will increase annual production 44 percent and decrease cost per ton off the face 21 percent. The report also includes conceptual drawings and specifications for a high-capacity four-drum shearer and a unique shield-type roof support specifically designed for very wide-web operation. The advantages and problems associated with wide-web mining are discussed in general and as they relate specifically to the equipment selected for the new mining system. The study concludes by recommending that surface coal loading tests be conducted as the follow-on work.
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