Proposed Method of Mining Coal in Pitching Seams, under Bad Roof

CIM Bulletin1930
FIRES and explosions are not likely to originate in clean gobs above pillar faces steadily driven through a solid panel in order to effect a complete extraction.
Keywords: Coal, Extraction, Fires, Mine, mine, Nest Pass Coal Company, outcrop, pillar system, shock absorber, Mines, mining, pillar, Pillars
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