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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 Bureau of Mines, United States, Department of Interior.

1. Longwall Face Showing Armored Conveyor, Planer, and Roof Supports

IDNO:
002747
Title:
Longwall Face Showing Armored Conveyor, Planer, and Roof Supports
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 Bureau of Mines, United States, Department of Interior.