在瓦斯矿井中打煤和岩石钻孔时,沼气泄出会引起巷道中沼气的积聚,因而有引起爆炸和燃烧的危险。为防止沼气进入巷道,必须将钻孔泄出的瓦斯引入瓦斯抽放系统。为此,必须使用《煤矿瓦斯抽放细则》中规定的打钻时抽放瓦斯的装置。然而,这种瓦斯抽放装置还存在着一系列缺点。 When coal and rock are drilled in gas mines, the release of biogas can cause the build-up of biogas in the roadway and therefore the risk of explosion and combustion. In order to prevent methane from entering the roadway, the methane leaked from the borehole must be introduced into the gas drainage system. For this reason, it is necessary to use the equipment for gas drainage during drilling as stipulated in the “Rules for Gas Drainage in Coal Mine”. However, this kind of gas drainage device still has a series of disadvantages.