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概述采用壁式采煤力法,回采前掘进大量准备巷道。经验表明,在瓦斯较大的煤层中掘进煤巷,在通风上带来许多困难,并且常常是瓦斯事故的祸源地。目前,我国还缺乏一种能够反映在不同煤层中掘进巷道时瓦斯泄出规律和瓦斯涌出量的计算方法。显然,为了正确地选择通风
Overview The wall coal mining method is adopted to excavate a large number of roadways before excavation. Experience has shown that tunneling coal seams in large coal seams has many difficulties in ventilation and is often the source of gas accidents. At present, there is still a lack of a calculation method that can reflect the law of gas leakage and the amount of gas emission when driving roadways in different coal seams. Obviously, in order to choose the right ventilation