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一、矿井瓦斯及试验区概况 用钻卸法开采极薄解放层的试验工作是在东林煤矿进行的。东林煤矿共突出135次(至1980年为止),最大突出强度1350吨。现生产水平(+ 110米水平)绝对瓦斯涌出量18.6米~3/分,相对瓦斯涌出量25.3米~3/吨。 本矿区煤层属二迭纪乐平煤系。共含煤6层,自上而下为:一、二、三、四、五、六号层。其中一、二、三号层为不可采层,五号层局部可采,四、六号层为可采层。四号层厚2.2～2.5米,为主采层,具有严重突出危险。
First, the mine gas and pilot area profile Drilling and dismantling method mining extremely thin layer of liberation test work carried out in Donglin Coal Mine. Donglin coal out of a total of 135 times (until 1980), the maximum outstanding intensity of 1350 tons. The current level of production (+ 110 meters) absolute gas emission 18.6 m ~ 3 / min, the relative gas emission 25.3 m ~ 3 / t. The coal seam belongs to the Permian Leping coal system. A total of 6 layers of coal, from top to bottom: one, two, three, four, five, six layers. One, two, three layer is not recoverable layer, the fifth layer can be locally recoverable, four, six layer is recoverable layer. The fourth layer of 2.2 to 2.5 meters thick, the main mining layer, with a serious outstanding risk.