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one kind of borehole hydraulic coal mining system

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The Borehole Hydraulic Coal Mining System (BHCMS) causes fragmentation of coal seams and removes coal slump through a drilled hole using high-pressure water jet.

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Glossary of Mining Terms - rocksandminerals.com. Abutment — In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal ...

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