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Auger mining, method for recovering coal by boring into a coal seam at the base of strata exposed by excavation. Normally one of the lowest-cost techniques of mining ...
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Auger mining is a surface mining technique used to recover additional coal from a seam located behind a highwall produced either by stripping or open-pit mining.
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auger mining (coal mining) -- Encyclopedia Britannica auger mining, method for recovering coal by boring into a coal seam at the base of strata exposed by excavation.
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