Modify Selection
- Research methods and measures:
- Weak rock
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Results 11 - 20 of 20
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7/1/2008 - Conference papersThis paper presents the results of a NIOSH study to evaluate UCS changes occurring in a broad range of weak coal measure rocks over a one-year time span.
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8/1/2005 - Conference papersNIOSH continues to investigate the behavior of fully grouted roof bolts in the weak roof rock of Pittsburgh's Safety Research Coal Mine. This paper describes the results of three roof bolt studies.
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3/1/2005 - Peer reviewed journal articlesA major focus of ground control research presently being conducted by the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) is to incorporate weak rock masses (such as are associated with operations in the ...
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2/1/2005 - Conference papersOne focus of ground control research at NIOSH is to incorporate data on weak rock masses into existing design relationships, with an emphasis on updating the span design curve for manned entries and the overbreak curve for longhole entries. Both curves ...
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2/1/2003 - Conference papersThis paper reports on an extensive series of short-encapsulation pull tests that were conducted in the NIOSH Mine Safety Research Laboratory and operating mines in WV and PA.
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8/1/2002 - Conference papersDespite its potential importance, there is no widely accepted anchorage test for fully grouted roof bolts. Recent studies using short encapsulation pull tests are described.
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8/1/2001 - Conference papersA state-of-the-art, three-dimensional, full waveform, microseismic system was used to analyze the rock failure around a deep bump-prone longwall panel. Analysis of the recorded events is discussed.
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7/1/2001 - Conference papersTo study bump mechanisms, conditions in the vicinity of a deep longwall mining face in bump-prone strata were monitored using three discrete systems in an effort to increase understanding of mining-induced stress redistribution and bump potential.
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1/1/1999 - Conference papersThe process of drilling and bolting the roof is currently one of the most dangerous jobs in underground mining, resulting in about 1,000 accidents with injuries each year in the United States. To increase the safety of underground miners, researchers f...
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4/1/1998 - Conference papersResearchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health (NIOSH) are developing numerical modeling tools to forecast time-dependent deformation around coal mine entries.
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Content source: National Institute for Occupational Safety and Health, Mining Program