低透气性突出煤层群首采层掏心无煤柱开采卸压消突与瓦斯治理试验研究

发布时间：2018-10-11 17:57

【摘要】：针对深井高瓦斯低透气性突出煤层群消突和首采层开采卸压瓦斯治理难题,以谢桥煤矿11426工作面开采为例,设计首采中间层无煤柱开采、实现上下突出煤层均消突的技术方案,研究了Y型通风工作面采空区瓦斯及风压分布规律,结合煤层群开采巷道布置条件,提出并实施留巷侧井下暗立眼回风阶段留巷Y型通风技术,强化留巷墙体封闭和留巷采空侧回风立眼封闭等卸压瓦斯抽采技术,实现了深井煤层群首采层工作面的安全高效回采和邻近突出煤层的全面消突。11426工作面回采期间,绝对瓦斯涌出量最大47.67 m3/min,工作面瓦斯抽采率高达65%以上,研究成果为今后类似深井煤层群开采的卸压瓦斯抽采和治理提供技术指导。
[Abstract]:In view of the difficult problems of outburst elimination in high gas and low permeability outburst coal seams in deep wells and the pressure relief gas treatment in the first mining seam, taking the mining of No. 11426 face of Xieqiao Coal Mine as an example, the technical scheme of no coal pillar mining in the first mining intermediate layer is designed to realize the outburst elimination of the upper and lower outburst coal seams. The distribution law of gas and wind pressure in goaf of Y-type ventilation working face is studied. Combined with the arrangement condition of coal seam group mining roadway, the paper puts forward and implements the Y-type ventilation technology in the stage of underground vertical hole return air in the side of the retaining roadway. In order to realize safe and high efficiency mining and comprehensive outburst elimination of adjacent outburst coal seams in deep coal seam group, the pressure relief gas extraction techniques such as wall closure of retaining roadway and seal of air return and vertical eye in goaf side of retaining roadway have been strengthened. During the mining period of 11426 working face, the coal face of deep coal seam group is safe and efficient and the outburst is completely eliminated. The absolute gas emission is the largest 47.67 m3 / min and the working face gas drainage rate is over 65%. The research results provide technical guidance for the unpressurized gas extraction and control similar to the deep coal seam group mining in the future.
【作者单位】：安徽建筑大学土木学院;西安科技大学能源学院;淮南矿业集团公司;
【基金】：国家自然科学基金资助项目(41172147) 陕西省百人计划特聘教授资助项目
【分类号】：TD713.3

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