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我矿开采二叠纪龙潭煤系,煤田褶皱复杂,断层发育,为向背斜构造,倾角变化由10°～90°,并有倒转现象。井田内有两层可采,即上_1和上_2层。上_1层煤的平均厚度为0.8左右,顶板泥质页岩,底板为泥岩;上_2层煤平均厚度0.6米左右,顶板为砂页岩,底板为泥砂岩。煤层均有自燃发火性,为主焦煤,挥发分30.5%,有煤尘爆炸危险性。矿井为超级瓦斯井。采用立井,石门开拓,中央边界抽出式通风,采用前进式回釆,采煤方法多用荊条假顶
I mine the Permian Longtan coal series, the coalfield fold complex, fault development, to the anticline structure, dip angle changes from 10 ° ~ 90 °, and the inversion phenomenon. Ida there are two recoverable, that _1 and _2 layer. The average thickness of the upper layer 1 coal is about 0.8, the shale of the top plate and the bottom plate are mudstone; the average thickness of the upper layer 2 coal is about 0.6m, the roof is sand shale, and the bottom plate is mudstone. Spontaneous combustion of coal are spontaneous, mainly coking coal, volatile matter 30.5%, there is the danger of coal dust explosion. Mine is a super gas well. The use of vertical wells, open Shimen, the central border out of ventilation, the use of forward-type back preclude the use of coal mining method Jingti top