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Results 91 - 100 of 270
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1/1/1995 - Reports of InvestigationsExperiments were conducted to determine if training using a latent-image, 3-D slide simulation exercise improved miners' ability to recognize roof and rib hazards. The training did significantly improve each miner's ability to recognize the hazards.
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1/1/1995 - Reports of InvestigationsDust control modifications were implemented on small, truck-mounted rock drills at surface coal mines. The control techniques showed noticeable improvement in measured dust concentrations around the drills.
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1/1/1995 - Reports of InvestigationsSubsidence data gathered by the U.S. Bureau of Mines over a series of longwall panels in the Pittsburgh Coalbed were studied to obtain insight as to the role of time in the subsidence process. These results were then compared to data from three other si...
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1/1/1994 - Reports of InvestigationsProduction trends were analyzed for 82 gob gas ventholes on 7 longwall panels in the Lower Kittanning Coalbed, Pennsylvania.
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1/1/1994 - Reports of InvestigationsA joint effort by the U.S. Bureau of Mines (USBM) and the U.S. Mine Safety and Health Administration (MSHA) was undertaken to determine how well self-contained self-rescuers (SCRS's), deployed in accordance with Federal regulations (30 CFR 75.1714), hel...
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1/1/1993 - Reports of InvestigationsDuring the normal course of underground coal mining, it sometimes becomes necessary to seal off abandoned areas to eliminate the need to ventilate them. Seals also are used to isolate fire zones or areas susceptible to spontaneous combustion. The object...
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1/1/1993 - Reports of InvestigationsThe U.S. Bureau of Mines investigated the performance of portable power cables under transient conditions. This research had a twofold purpose: (1) to define the thermal characteristics of electrically overloaded trailing cables, and (2) to conceptuali...
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1/1/1993 - Reports of InvestigationsThis article describes the development of adaptive learning networks (polynomial networks) to detect and quantify winding insulation leakage on electrical motor windings. This is part of a project to detect impending component failure in mine electrical...
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1/1/1993 - Reports of InvestigationsComponent failure in the electrical control circuits of mining machines account for a large percentage of the total downtime of the machine. This report details U.S. Bureau of Mines development of a generic procedure for synthesizing diagnostic systems...
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1/1/1993 - Reports of InvestigationsResearchers at the U.S. Bureau of Mines investigated the use of close-range photogrammetry and subsequent stereo digitizing to obtain data from rock fracture roughness profiles.
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Content source: National Institute for Occupational Safety and Health, Mining Program