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Results 121 - 128 of 128
6/1/1998 - Information CircularsA collection of 15 papers from leading international ground control specialists. The papers address the entire range of issues associated with coal pillars and have a decidedly practical flavor.
1/1/1998 - Peer reviewed journal articlesRoof and rib conditions were observed and assessed in 33 underground stone mines. It was found that selection of the mining horizon and mine layout decisions tremendously influence ground stability.
1/1/1998 - Conference papersUnusual circumstances sometimes require a longwall retreat into/through a previously driven room, with the potential for failures and roof fall hazards. To determine the failure factors, NIOSH compiled an international database of 130 case histories.
A videotaped interview with a miner about a fall that occurred while he and another miner were attempting to bar down top just inby the last row of supports. An instructor's guide lets you use the video as part of an effective training session.
1/1/1992 - Information CircularsReviews the mechanics of rib failure and the relationship of coal mine geology and pillar constraint to rib instability. Strategies for choosing an effective method of rib support are considered and various rib support methods are discussed.
A videotaped interview with Dave about the experience of recovering the body of a friend who was killed by a roof fall while under unsupported top.
A videotaped interview with a miner helper who witnessed a roof fall that convered the continuous mining machine. An instructor's guide is included to help you use this video as part of an effective training session.
Geologic Factors Causing Roof Instability and Methane Emission Problems: The Lower Kittanning Coalbed, Cambria County, Pa1/1/1973 - Reports of InvestigationsA geologic study of Mines 32 and 33 in Cambria County, Pennsylvania, was conducted as part of a methane control research program.