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青龙煤矿煤层透气性低,回采工作面瓦斯经长时间预抽仍无法消除突出危险,造成工作面回采期间瓦斯涌出量增加,严重影响生产进度。青龙煤矿采取“穿层钻孔+顺层钻孔”立体抽采本煤层瓦斯、“高位钻孔+采空区埋管”抽采采空区瓦斯的综合治理模式,有效地治理了工作面瓦斯涌出,杜绝了工作面回采期间瓦斯超限现象,提高了工作面的生产效率。
The gas permeability of Qinglong Coal Mine is low. The long time pre-pumping of gas on the mining face can not eliminate the outstanding danger, resulting in the increase of gas emission during the mining face and seriously affecting the production progress. Qinglong Coal Mine adopts the comprehensive management mode of “gas drainage through layers of drilling + bedding drilling” and “three-dimensional pumping of gas in the coal seam” and “high-level drilling + gas drainage pipe” to effectively mine The gas emission from the working face eliminated the gas overrun phenomenon during the working face recovery and the production efficiency of the working face was improved.