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- Hazards and exposures:
- Ground falls
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Results 21 - 26 of 26
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8/1/2005 - Conference papersResults show that the remnant upper seam structure's size can influence multiple seam interaction. Specifically, smaller critically loaded upper seam pillars appear more likely to cause lower seam ground control problems than wider pillars.
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8/1/2004 - Conference papersField studies were conducted to record electromagnetic (EM) emissions at the Galena Mine, Wallace, Idaho. The goal of the research was to determine if EM emissions were valid precursors to imminent ground failure.
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6/1/2004 - Conference papersAs part of a research program to reduce injuries and fatalities in the U.S. mining workforce, NIOSH is investigating the potential use of noncontact vibration measurements to identify hazardous ground fall conditions.
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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 papersNIOSH has been evaluating developments in sealant support systems for ground control. This paper reviews current technology in shotcrete and membrane development, evaluates a long-term study of sealant materials, and examines installation practices.
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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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Content source: National Institute for Occupational Safety and Health, Mining Program