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You searched for: Topical Subjects Coal mines and mining. Remove constraint Topical Subjects: Coal mines and mining. Topical Subjects Mine roof control. Remove constraint Topical Subjects: Mine roof control.
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'Modified longwall mining with a German coal planer. Progress report 2: Completion of mining in three adjacent panels in the Pocahontas no. 4 coal bed, Helen, W. Va.' Please give credit to the Bureau of Mines, United States, Department of Interior.

1. Interior of a Coal Mine with Roof Supports Along Longwall Face

IDNO:
002721
Title:
Interior of a Coal Mine with Roof Supports Along Longwall Face
Description:
'Modified longwall mining with a German coal planer. Progress report 2: Completion of mining in three adjacent panels in the Pocahontas no. 4 coal bed, Helen, W. Va.' Please give credit to the Bureau of Mines, United States, Department of Interior.