一、概述在成煤过程中生成的大量瓦斯(沼气)随着煤层的形成,不仅包含在煤层本身而且也包含在煤系地层中,由于地层的复盖抑制了瓦斯的排放,使煤层和煤系地层中的瓦斯具有一定的压力以吸附状态和游离状态,赋存在煤层和岩层的细微孔隙,节理和裂隙中,在矿井的井田范围内,瓦斯的储量可达几亿立方米甚至几十亿立方米,这样巨量的瓦斯,当矿井进行开拓和开采以后,随着采矿空间的扩大,不断涌出到矿井的巷道中,造成生产的危害,然而分析流入矿井巷道中瓦斯的来源不外如下几个方面: I. Overview The large amount of methane (biogas) generated during the coal formation is not only included in the coal seam itself but also contained in the coal-bearing formation due to the formation of the coal seam. Since the cover of the formation suppresses the emission of methane, the coal seam and coal The gas in the strata has some pressure to adsorb the state and the free state, which exist in the fine pores, joints and fissures in the coal seam and rock strata. Within the minefield, gas reserves can reach hundreds of millions of cubic meters or even billions Cubic meters, so huge amount of gas, when the mine after exploration and exploitation, with the expansion of mining space, continue to pour into the mine roadway, causing harm to production, but analysis of the mine into the tunnel gas sources are as follows several aspects: