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详细介绍了高瓦斯煤矿采空区瓦斯抽放常用的2种方法(高位钻场与高抽巷),并对其进行了评述。通过张集煤矿的工程实例说明了采空区瓦斯抽放的必要性及可行性,1115(3)综采工作面采空区瓦斯抽放率高达62%,说明综合抽放采空区瓦斯的效果明显,同时可以看出高抽巷的抽放效果明显高于高位钻场,并且在回采结束后的一段时间里高抽巷还可以继续抽放采空区内瓦斯,降低后续回采瓦斯管理的压力。
Two methods (high drilling field and high pumping lane) commonly used in gas drainage in goafs of high gas coal mines are introduced in detail and reviewed. Through the case of Zhangji Coal Mine, the necessity and feasibility of gas drainage in goaf are illustrated. The gas drainage rate in goaf of fully mechanized coal face is as high as 62% in 1115 (3) The effect is obvious. At the same time, it can be seen that the drainage effect of the high-pumping roadway is obviously higher than that of the high-level drilling site. In the period after the end of the mining, the high-pumping roadway can continue to drain the gas inside the mined area and reduce the follow-up recovery of gas management pressure.