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1985年8月24日淮南某煤矿,煤巷掘进头发生一起重大瓦斯爆炸事故。波及范围达700多米,冲垮巷道3处约10多米长,损坏风筒800多米,造成多人伤亡和重大经济损失。这次瓦斯爆炸是在掘进头安全装备、监测手段和风量都符合煤矿安全规程的有关规定下发生的。为什么在这种情况下还发生了瓦斯爆炸呢?下面我们来分析一下发生爆炸的引火源和瓦斯源,以便从中吸取教训。一、事故地点概况事故掘进头是高沼气煤层,沿煤掘进,设计长320m,事故前已施工280m。采用毫秒雷管全断面一次爆破。U 型和梯型两种支
August 24, 1985 a coal mine in Huainan, coal tunneling head with a major gas explosion accident. Spread to more than 700 meters, crushing the roadway 3 about 10 meters long, damaged duct more than 800 meters, resulting in many casualties and major economic losses. This gas explosion is in the heading safety equipment, monitoring methods and air volume are in line with the relevant provisions of coal mine safety regulations occurred. Why in this case also occurred gas explosion? Here we analyze the source of explosion and gas sources, in order to learn from. First, the accident site Overview Incident excavation head is a high biogas seam, along the coal tunneling, design length 320m, before the accident has been construction 280m. Adopt millisecond detonator full blasting in one section. U-type and ladder-type two branches