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Reducing the fire and explosion hazards of flame-cutting and -welding in underground coal mines

机译：减少地下煤矿的火焰切割和焊接的火灾和爆炸危险

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摘要

One of the major ignition sources of fires and explosions in underground U.S. coal mines is flame cutting and welding. On May 20,2006, aflame-cutting operation at the Darby Mine No. 1 led to an explosion that resulted in five fatalities. On Jan. 22,2003, another explosion caused by flame cutting at the McElroy Mine resulted in three fatalities and three serious injuries. On June 22,1999, a flame-cutting and welding operation at the Loveridge Mine caused afire that required sealing the mine for an extended period. On March 19,1992, an explosion initiated by welding at the Blacksville No. 1 Mine resulted in four fatalities. These examples of mine incidents demonstrate the need to conduct research to develop best practices for safely conducting flame cutting and welding in underground coal mines. The National Institute for Occupational Safety and Health (NIOSH) conducted a study on fires and explosions in underground U.S. coal mines that were caused by flame-cutting and welding operations to determine the root causes of these types of incidents. The methodology included interviewing mining personnel who perform flame-cutting or welding operations in underground U.S. coal mines and visiting mines to observe these operations. In addition, MSHA reports of investigations and accidents statistics were analyzed. The findings were used to identify and compare differences between flame-cutting and welding practices and techniques in small and large mines, eastern and western mines, low-seam and high-seam mines, room-and-pillar and longwall mines, and between experienced miners and new miners. As a result of this study, best practices were developed to reduce the number of fires and explosions caused by flame cutting and welding. This paper provides a summary of this research.
机译：美国地下煤矿着火和爆炸的主要点火源之一是火焰切割和焊接。 2006年5月20日，达尔比1号矿的火焰切割操作导致爆炸，造成5人死亡。 2003年1月22日，McElroy矿的火焰切割引发的另一场爆炸导致三人死亡和三人重伤。 1999年6月22日，洛夫里奇矿山的火焰切割和焊接操作引起大火，需要将矿山长时间封堵。 1992年3月19日，布莱克斯维尔1号矿的焊接引发爆炸，造成4人死亡。这些煤矿事故的例子表明，有必要进行研究以开发最佳实践，以安全地进行地下煤矿的火焰切割和焊接。美国国家职业安全与健康研究所（NIOSH）对美国地下煤矿因火焰切割和焊接操作引起的火灾和爆炸进行了研究，以确定这些事件的根本原因。该方法包括采访在美国地下煤矿进行火焰切割或焊接操作的采矿人员，并访问矿井观察这些操作。此外，还分析了MSHA的调查报告和事故统计数据。这些发现被用于识别和比较大型和小型煤矿，东部和西部煤矿，低煤层和高煤层煤矿，房柱和长壁矿山以及经验丰富的矿山之间的火焰切割和焊接实践与技术之间的差异。矿工和新矿工。这项研究的结果是，开发了最佳实践以减少火焰切割和焊接引起的火灾和爆炸的发生。本文提供了这项研究的摘要。

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