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补连塔煤矿22307工作面上覆12煤采空区存在沿工作面走向长度约553 m的房采区域,浅埋藏煤层地质结构导致房采区内有大量的积水,利用油浴程序升温实验,通过对氧化升温过程中不同水分含量条件下的氧气消耗率进行对比分析,得出遗煤经水浸泡疏干后氧化反应速度更快,自燃危险性更大,疏放水期间及时利用原探放水孔对上覆12煤房采区进行注氮惰化,施工地面钻孔对上覆房空区进行预防性注浆,确保了22307工作面安全回采。
There are existing mining areas along the working face with a length of about 553 m in the coalface of 12307 face in BuLinta Coal Mine. The geological structure of shallow buried coal seam leads to a large amount of stagnant water in the mining area. The oil bath temperature program Through comparative analysis of the oxygen consumption rates under different moisture contents in the process of oxidation and temperature increase, it can be concluded that the oxidized reaction rate of spontaneous coal after the water is soaked and dredged is faster and the risk of spontaneous combustion is greater. Hole on the overlying 12 coal mining area for nitrogen inerting, construction of the ground borehole overlying the premises of a preventive injection, to ensure the safe mining 22307 face.