低透气性煤层瓦斯综合抽采及利用模式探索

为了解决平煤股份八矿瓦斯突出问题，结合自身多年经验，探索出了适合平煤八矿的低透气性煤层瓦斯综合抽采及利用模式。通过“运输巷底抽巷+穿层钻孔”掩护运输巷顺利掘进，在工作面两巷道施工完毕后，从两巷施工本煤层钻孔抽采工作面煤层瓦斯。由于本煤层钻孔轨迹难以控制，容易导致工作面中间出现空白带，因此通过“采面中间底抽巷+穿层钻孔”进一步消除采面中间的突出危险性；开发了本煤层钻孔和穿层钻孔的封孔工艺，满足了瓦斯高浓度抽采。瓦斯抽采保障了发电机组的顺利发电，瓦斯发电量逐年上升；瓦斯抽采和发电利用相互促进，形成了良性循环。

Exploration of comprehensive gas drainage and utilization mode in low permeability coal seam

In order to solve the main problems of gas outburst in Pingdingshan No.8 Coal Mine，combined with their own years of experiences，a comprehensive gas extraction and utilization mode for low permeability coal seam suitable was explored.The outburst was terminated by the floor roadway and the layer through drillings.After the construction of the air inlet and outlet roadways，construct drillings along the coal seam from the two coal seam roadways to extract the coal seam gas from the coal seam.Because the drilling trajectory in coal seam is difficult to control which is easy to cause the empty areas in the middle of the working face，the outburst danger in the middle of the mining face can be further eliminated by "drawing the middle floor drainage roadway and layer through drillings".Then the sealing technologies for the layer through drillings and the drillings along the coal seam are developed to meet the high concentration gas drainage，and the effect is remarkable.The gas extraction has ensured the smooth generation of the generating unit，and the gas power generation increases year by year.Gas extraction and power generation use each other to promote the formation of a virtuous circle.