顶板走向高位钻孔瓦斯抽采技术在孟津煤矿三软突出煤层中的研究与应用

Research and Application of Roof Strike High Drilling Gas Extraction Technology in Three-Soft Outburst Coal Seam in Mengjin Coal Mine

为有效解决孟津煤矿11010工作面回采过程中,采空区以及上隅角的瓦斯积聚问题,根据工作面的实际情况,在采煤工作面回风顺槽布置顶板走向高位钻孔对采空区瓦斯进行治理。通过具体试验并对比抽采浓度情况,确定孟津煤矿11010工作面裂隙带高度应在27~35 m,最终认定将钻孔终孔点布置在距煤层顶板25和35 m处时的瓦斯抽采效果最好。

In order to effectively solve the gas accumulation in the goaf and the upper corner during the mining process of the 11010 working face of Mengjin Coal Mine.According to the actual situation of the working face,the gas in the goaf is controlled by arranging the top plate along the trough with the return air in the coal mining face.Through specific tests and comparison of the extraction concentration,it is deter⁃mined that the height of the fissure zone in the 11010 working face of Mengjin Coal Mine should be 27~35 m.Finally,it is determined that the gas drainage has best effect when the end point of the borehole is ar⁃ranged at 25 m and 35 m from the coal seam roof.