Longwall mining
Longwall mining
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Energy glossary
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Longwall mining
Meaning of term longwall mining
An automated form of underground coal mining characterized by high recovery and extraction rates, feasible only in relatively flat-lying, thick, and uniform coalbeds. A high-powered cutting machine is passed across the exposed face of coal, shearing away
Source: http://www.desc.dla.mil/dcm/files/all%20inclusive%20energy%20glossary.xls
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