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- Roof quality
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Results 21 - 30 of 33
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8/1/2003 - Conference papersRoof Monitoring Safety Systems (RMSS) were installed in 13 underground limestone mines in 6 states. This paper analyzes the data obtained at three of the mines and provides an overview of the system, data, analysis and applications relevant to RMSS.
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4/1/2003 - Technology NewsThe Coal Mine Roof Rating (CMRR) is a roof classification system. It was first introduced to the mining community in 1994. It has now been written to a user friendly version that can be run on any PC with a Windows operating system.
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8/1/2002 - Conference papersThe purpose of this paper is to bring the mining community up to date with recent improvements and applications of the CMRR.
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7/1/2002 - Reports of InvestigationsThe 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. Researchers from the Spokane Research Laboratory of the Nat...
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7/1/2002 - Conference papersThe investigation reported here is an initial study of the stability of the first of the proposed chambers at the Homestake Mine in Lead, SD.
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6/1/2000 - Technology NewsThe Roof Monitoring Safety System (RMSS) introduced in late 1997 has been modified to improve durability and simplify the measurement of roof or rib movement.
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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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1/1/1996 - Reports of InvestigationsGround penetrating radar (GPR) has been investigated by NIOSH for its potential to determine roof hazards in underground mines. GPR surveys were conducted at four field sites with accompanying ground truth to evaluate GPR for roof hazard detection.
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2/1/1995 - Technology NewsThe objective of this work is to develop a comprehensive, practical method for designing longwall gate entries that considers coal pillar size, mine roof quality, and artificial support in an easy-to-use computer program.
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7/1/1994 - Conference papersThe paper, presents the results of roof coal thickness measurements in underground mines and rib coal thickness measurements in highwall mines. The microwave sensor described uses a unique spatial modulation scheme created by antenna motion, along with ...
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Content source: National Institute for Occupational Safety and Health, Mining Program