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National Institute for Occupational Safety and Health National Institute for Occupational Safety and Health
National Institute for Occupational Safety and Health

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x McDowell County (West Virginia)
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    McDowell County (West Virginia) (1)
  • Performance of a novel bump control pillar extracting technique during room-and-pillar retreat coal mining
    Filetype[PDF - 1.28 MB]
    Personal Author:
    Campoli, A. A. (Alan A.) ; Oyler, David C. ; ...
    Corporate Authors:
    United States. Bureau of Mines.
    Published Date:
    1989
    Series:
    Report of investigations (United States. Bureau of Mines) ; 9240
    Description:
    "Retreat pillar mining concentrates stresses on workings directly outby gob areas, which can result in coal mine bumps. The development of bump-contro...
    File Type:
    Filetype[PDF - 1.28 MB]
    File Type:
    Filetype[PDF - 1.28 MB]