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- Mine locations, excavations, and structures:
- Pillars
- Document types:
- Conference papers
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Results 11 - 20 of 20
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8/1/2004 - Conference papersUnderground limestone mine roofs in Northern Appalachia can be subject to high horizontal stresses. A case study is presented showing that induced stress changes in the immediate roof are less likely if the pillars contain weak bedding planes.
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12/1/2003 - Conference papersPillar recovery has been associated with nearly one third of roof fall fatalities in underground coal mines during the past decade. This paper discusses design methods and technologies that have been transferred and implemented in mining.
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8/1/2002 - Conference papersStudies have identified a number of factors for evaluating a pillar extraction plan. This paper discusses each of the factors, presents relevant accident statistics, and shows how the risk factors can be combined to estimate the overall hazard.
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8/1/2001 - Conference papersThe risk of major pillar falls can often be reduced by leaving final stumps, large enough to protect the intersection but small enough to not inhibit gob caving. Analyses were conducted to assess factors on the size variation of remnant stumps.
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8/1/2000 - Conference papersThis paper addresses a deficit in pillar loading research by exploring the accuracy of empirical abutment load calculations using insight provided by an elastic overburden model, a laminated overburden model and field observations.
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3/1/1999 - Conference papersAn investigation of an underground pillar at a mine in Lead, SD. Using the results, researchers hypothesize that pillar rocks have the ability to withstand stress an order of magnitude greater than they currently sustain.
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1/1/1999 - Conference papersThis paper examines current design practices for stone mines and discusses issues for safe mine layouts so that a rational first approach towards balancing the demands for increased production can be weighed against increased risk to worker safety.
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1/1/1997 - Conference papersRock masses in deep-level mines are subject to high stresses, which can result in unexpected failure of rock into mined-out openings. Personnel from two research centers of the former U.S. Bureau of Mines, Spokane and Twin Cities, investigated a rock b...
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8/1/1990 - Conference papersThis paper describes research designed to quantify the behavior of a particular size abutment pillar prone to burst or bump (local terminology). This research has attempted to construct the stress and convergence profiles of the pillar.
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1/1/1990 - Conference papersThis U.S. Bureau of Mines paper discusses the importance of an interface slip mechanism between the coalbed and the surrounding strata in controlling the extent and pattern of stresses and deformations in a coal pillar.
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Content source: National Institute for Occupational Safety and Health, Mining Program