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Results 191 - 200 of 282
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10/1/1999 - Reports of InvestigationsAn analysis of the consequences of increasing longwall panel dimensions, particularly face width, in gassy coalbeds. Continuous longwall face emission monitoring studies were conducted at two adjacent mines operating in the Pocahontas No. 3 Coalbed, whe...
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3/1/1999 - Conference papersRecently, powerful design methods have emerged from analysis of large data bases of real-world pillar successes and failures. In the process, our understanding of pillar mechanics has been greatly enriched.
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1/1/1999 - Information CircularsThis work identified the most important variables contributing to coal bumps. These are (1) mechanical properties of strata, including local yield characteristics of a mine roof and floor, (2) gate pillar factors of safety, (3) roof beam thickness, join...
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10/1/1998 - Conference papersGrowing concern from labor unions, regulatory agencies, and industry about the safety of a prevalent underground coal mining method which utilizes remote control has prompted human factors field evaluation of mining activities. To determine work methods...
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10/1/1998 - Reports of InvestigationsOne of the applications of enabling technology for remote-controlled mining to protect miners is the use of a guidance system on the continuous haulage equipment so that it follows the continuous mining machine that extracts the coal.
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8/1/1998 - Conference papersGround conditions at 10 Australian longwall mines and two room-and-pillar mines are compared with an extensive database from U.S. mines. Comparisons include the Coal Mine Roof Rating, roof support, pillar design, and ground control conditions.
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8/1/1998 - Conference papersBased on field investigations and a U.S. coal mines database containing 12 mines and 639 roof falls, NIOSH determines the factors that influence intersection instability and provides guidelines for the safe excavation and support of intersections.
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6/1/1998 - Conference papersThis paper contains the results of an examination of accident, injury, employment, and production information reported to the U.S. Department of Labor's Mines Safety and Health Administration (MSHA) and provides information on some of the measures longw...
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7/1/1997 - Technology NewsThe analysis of Retreat Mining Pillar Stability (ARMPS) computer program was developed in 1995 and has been widely accepted by the mining community. A Windows version of ARMPS is now available. It features simplified data input, graphics, and an expande...
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7/1/1997 - Technology NewsTo provide a safe, practical, cost-effective method for measuring coal rib thickness during highwall mining.
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Content source: National Institute for Occupational Safety and Health, Mining Program