针对工作面、邻近层或采空区瓦斯抽采增加采空区漏风的问题,以天池煤矿401工作面尾巷排放采空区瓦斯结合顶板走向高抽巷抽采上邻近层瓦斯、顺层钻孔抽采本煤层瓦斯,即以瓦斯立体抽采系统为实例,运用实测与模拟相结合的方法,研究瓦斯立体抽采系统中采空区漏风规律。研究表明:瓦斯立体抽采作用下的漏风流进入采空区的深度大幅增加;高抽巷的作用使得采空区漏风量增加,导致采空区中深部浮煤自然发火危险性增加。

According to the air leakage problem of the goaf increased by the gas drainages in coal mining face, neighboring seam or goaf, taking the tail gateway of No.401 coal mining face in Tianchi Mine to drain the gas in goaf in combination with the high level gateway along the roof strike to drain the gas in top neighbor seam a nd the borehole in along seam to drain the gas in the mining seam as a case of 3D gas drainage system, a site measurement and simulation method was applied to stu dy the air leakage law of goaf under the 3D gas drainage system.The study showed that under the role of the 3D gas drainage, the depth of the air leakage flow into the goaf would be highly increased and the role of the high level gateway could make the air leakage value of the goaf increased and could cause the spontaneous combus tion danger of the coal left in the middle section of the goaf increased.

国家自然科学基金资助项目(51174198)；国家重点实验室自主课题资助项目(SKLCRSM11X01)；