三软低透煤层回采工作面快速消突技术

Rapid Outburst Elimination Technology in Mining Face with Three-soft and Low-permeability Coal Seam

大众煤矿开采的二1煤层为三软低透突出煤层,由于煤层煤质软易塌孔,需要较长的抽采时间才能满足消突效果要求。瓦斯抽采效果不理想造成采掘衔接紧张,已经对矿井的经济效益产生较大的影响。针对这些技术难题,大众煤矿优化抽采钻孔布置方案,并采取顺层全钻孔防塌孔技术措施,较好地提高了抽采效果和效率。

The No. 21 coal seam mined by Dazhong Coal Mine is a three-soft and low-permeability coal seam. Because the coal seam is soft and easy to collapse, it takes a long extraction time to eliminate the outburst. In addition, the unsatisfactory effect of gas drainage results in a bad mining continuity, which has a great impact on the economic benefits of the mine. In view of these technical problems, the layout scheme of extraction boreholes is optimized in Dazhong Coal Mine, and the technical measures against borehole collapse are adopted to improve the extraction effect and efficiency.