１概述滕州市曹庄煤矿与枣庄矿务局柴里煤矿开采同一煤层３下煤层。该层煤经自燃倾向性级别鉴定为Ⅱ级，是易自燃煤层，自燃发火期６～１１个月。柴里煤矿自建矿以来，先后发生自燃火灾７０余起，迄今尚存火区十余处，冻结煤量数十万吨。而曹庄煤矿自１９９１年１０月揭露... 1 Overview Caozhuang Coal Mine in Tengzhou City and Zhaizhuang Mining Bureau Chaili coal mining coal seam 3 under the same seam. The layer of coal was identified by the propensity to spontaneous level Ⅱ, is easy to spontaneous combustion of coal spontaneous combustion period of 6 to 11 months. Since the coal mine was built in Chaili, more than 70 spontaneous combustion fires have occurred since then, so far there are more than 10 firefighting areas, with hundreds of thousands of tons of coal frozen. And Caozhuang coal mine exposed in October 1991 ...