一、矿井概况与自然发火情况我矿1号井属于低沼气矿井,曾于1972年12月7日发生过局部瓦斯爆炸引起煤尘燃烧事故。采煤方法多种多样,采用过倾斜分层竹笆假顶采煤法,倾斜分层煤皮假顶采煤法; First, mine profiles and natural fire situation I mine No. 1 wells are low-methane wells, had on December 7, 1972 partial gas explosion caused by coal-dust combustion accident. Coal mining methods varied, using over stratified bamboo fence fake roof mining method, inclined stratified coal skin roof mining method;