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Longwall retreat of gate road pillars
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  1. Effects of various longwall chain pillar configurations on gate road stability
    Personal Author:
    Listak, Jeffrey M.; Zelanko, Joseph C.; Barton, T. M. (Timothy M.);
    Corporate Author:
    United States. Bureau of Mines.
    Published:
    1988
    Series:
    Report of investigations (United States. Bureau of Mines) ; 9184
    Description:
    "The Bureau of Mines conducted a field study to assess the performance of various chain pillar configurations in terms of gate road entry stability. Vibrating wire stressmeters (vws's) were installed in four consecutive gate road chain pillars. Field...
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    Filetype[PDF - 1.03 MB]
  2. Proceedings of the Second International Workshop on Coal Pillar Mechanics and Design
    Personal Author:
    Heasley, Keith A.; Iannacchione, Anthony T.; Mark, Christopher; Tuchman, Robert J.;
    Corporate Author:
    Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)
    Conference Author:
    International Workshop on Coal Pillar Mechanics and Design 1999 : Vail, CO)
    Published:
    June 1999
    Series:
    Information circular (National Institute for Occuptional Safety and Health) ; 9448
    DHHS publication ; no. (NIOSH) 99-114
    Description:
    "Pillar design is the first line of defense against rock falls--the greatest single safety hazard faced by underground coal miners in the United States and abroad. To help advance the state of the art in this fundamental mining science, the National ...
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  3. Coal Pillar Design For Longwall Gate Entries; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Personal Author:
    Cassie, John W.; Altounyan, Peter F. R., PH.D.; Cartwright, Paul B.;
    Published:
    5/1/1999
    Description:
    This paper describes measured data on strata behavior obtained in recent years from sites in the United Kingdom and the implications for pillar design. The data include results from overcoring stress measurements adjacent to coal mine roadways and de...
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  4. Longwall gate road stability in a steeply pitching thick coal seam with a weak roof
    Personal Author:
    Barron, Lance R.; DeMarco, Matthew J.;
    Corporate Author:
    United States. Bureau of Mines.; Eastern Associated Coal Corp.;
    Published:
    1995
    Series:
    Report of investigations (United States. Bureau of Mines) ; 9580
    Description:
    "The U.S. Bureau of Mines conducted a ground pressure analysis of a wide abutment-type chain pillar in a two-entry gate road of a Western U.S. coal mine with an extremely weak immediate roof. This report discusses gate road layout and performance and...
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  5. Analysis Of Longwall Tailgate Serviceability (Alts): A Chain Pillar Design Methodology For Australian Conditions; Proceedings Of The Second International Workshop On Coal Pillar Mechanics And Design
    Personal Author:
    Colwell, Mark; Frith, Russell, PH.D.;
    Published:
    5/1/1999
    Description:
    This paper summarizes the results of a research project whose goal was to provide the Australian coal industry with a chain pillar design methodology readily usable by colliery staff. The project was primarily funded by the Australian Coal Associatio...
    File Type:
    Filetype[PDF - 286.06 KB]