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Subsidence Resulting from Multiple-Seam Longwall Mining in the Western United States: A Characterization Study
The report details the investigation of multiple seam longwall subsidence conducted by the Bureau of Mines from 1978 to 1989. A field investigation monitored ground surface movements over four upper seam longwall panels, and six lower seam panels. The characteristics of the subsidence occurring as a result of mining these panels are examined; in particular, the angle of draw, subsidence development, total magnitude and real extent, and critical width, are each evaluated and discussed. Comparisons are also made between the characteristics of multiple seam longwall subsidence to single seam longwall subsidence that occurred at the same site.
Subsidence Resulting from Multiple-Seam Longwall Mining in the Western United States: A Characterization Study
The report details the investigation of multiple seam longwall subsidence conducted by the Bureau of Mines from 1978 to 1989. A field investigation monitored ground surface movements over four upper seam longwall panels, and six lower seam panels. The characteristics of the subsidence occurring as a result of mining these panels are examined; in particular, the angle of draw, subsidence development, total magnitude and real extent, and critical width, are each evaluated and discussed. Comparisons are also made between the characteristics of multiple seam longwall subsidence to single seam longwall subsidence that occurred at the same site.
Subsidence Resulting from Multiple-Seam Longwall Mining in the Western United States: A Characterization Study
R. C. Dyni (author)
1991
28 pages
Report
No indication
English
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