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  • Methods for Controlling Explosion Risk at Coal Mine Working Faces

    At coal mine working faces, simultaneous application of three basic elements reduces the methane explosion hazard: ... Risk-reduction studies using fault-tree analysis have shown that large reductions in explosion .... If the face emits 0.01 m3 of gas per second, the average concentration in the immediate face area will be.

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  • Explosion Prevention in United States Coal Mines - Centers for ...

    Still, the recent tragic explosions at the Sago mine (12 fatalities) and at the Darby mine (5 fatalities) in 2006 have demonstrated that methane gas explosions continue to present a significant risk to the coal industry. Another explosion hazard in underground coal mines is fine coal dust which can be dispersed and ignited by...

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  • explosibility of coal dust - USGS Publications Warehouse

    of coal dust, summarizes the experiments and mine investigations that have established this belief, and gives the present status of pre- ventive measures. It has been prepared in accordance with the pro- visions of the acts of Congress authorizing investigations relating to the causes of mine explosions, and contains...

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  • Dust explosion - Wikipedia

    Secondary dust explosions are the result of dust accumulation inside a building being disturbed and ignited by the primary explosion, resulting in a much more dangerous uncontrolled explosion inside the workplace. Historically, fatalities from dust explosions have largely been the result of secondary dust explosions.

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  • Why Do Coal Mines Explode? - Live Science

    Apr 6, 2010 ... Coal mine explosions can be blamed on Methane and coal dust. ... Coal mines in the United States have taken safety measures to avoid dust explosions, including spreading lizenithne powder over the coal dust. Lizenithne powder makes it more difficult for shock waves from methane explosions to blow up...

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  • Mining accident - Wikipedia

    In Moura on 7 August 1994 a third major mining accident occurred with an explosion at Moura No. 2 Mine. A second explosion at the mine approximately a day and a half later saw rescue attempts abandoned, and the mine was sealed, with the bodies of the 11 miners unretrieved. In the 1996 Gretley coal mine disaster,...

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  • Notes on the prevention of dust and gas explosions in coal mines

    Coal-dust explosions in yarious fieldf-L__________________________________. Anthracite fields of lennsylvani"- .... great mine explosions have not occ1lrecl as frequently in this country during the past few years as .... sened by the use of safety lamps exclusively, A second source of danger has been the ignition of a...

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  • Reducing float coal dust - NCBI - NIH

    Dec 22, 2016 ... The U.S. National Institute for Occupational Safety and Health (NIOSH) had initiated a five-year research project that aims to investigate methods and technologies to reduce the potential for secondary coal dust explosions by the purposeful capture and/or suppression of float coal dust prior to its deposition...

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  • Explosion Pressure Design Criteria for New Seals in U.S. Coal Mines

    IC 9500. INFORMATION CIRCULAR/2007. Explosion Pressure Design. Criteria for New Seals in U.S. Coal Mines. Department of Health and Human Services. Centers for Disease Control and ...... typically mine a three-entry gate road system off the mains or submains to develop a longwall panel. The entire coal block is...

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  • Coal mining disasters - SourceWatch

    Coal mining accidents can occur in the process of mining coal, and have a variety of causes, including leaks of poisonous gases such as hydrogen sulphide .... There were two explosions, one on March 29, that killed 36 people at the Baobao Coal Mine in Baishan and a second explosion on April 1 killing 17 more people.

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