采煤工作面特大瓦斯爆炸事故原因分析

Causes analysis of gas explosion accident happened in working face

采用理论分析法并结合大型煤矿生产的实际,利用矿压、煤炭自燃、采空区瓦斯流场、瓦斯爆炸等理论,对频频发生的煤矿采煤工作面特大瓦斯事故的原因进行了分析,得出了煤矿特大瓦斯爆炸的原因:当采煤工作面上覆岩层大面积垮落时,采空区深部积聚的大量瓦斯被挤出,气流经过煤炭自燃区域时,点燃了浓度在爆炸范围内的瓦斯,因而导致了特大瓦斯爆炸.

Used theoretical analysis way to study the project. According to groud-pressure, coal combustion, gas- flow in waste and gas-explosion and link with producing practice of big coal mines, analyzed cause of big scale gas- explosion happening again and again in mining faces. The causes of big scale gas exploding in mines were that when top strata broke down, the gas in deeper waste was extruded, while the gas at explode extend passed zone of coal combustion, so that gas explosion would happen.