Effectiveness of Bleeder Entries in Ventilating Pillared Areas of Bituminous-Coal Mines
Description:
Report issued by the Bureau of Mines over studies conducted on bleeder application in bituminous coal mines. The methods and results of the studies are presented. This report includes illustrations.
Date:
September 1957
Creator:
Kingery, Donald S. & Dornenburg, D. D.
Item Type:
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Report