综采条件下软弱覆岩破坏规律探测研究

为探求水体下采煤提高回采上限的可能性和安全性,利用地面探测钻孔进行覆岩破坏探测试验,试验表明了倾斜长壁综采条件下软弱覆岩的破坏发展高度较低,仅为常规数值的50%左右,为条件类似矿井缩小防水煤柱、提高采煤上限提供重要的参考。

Detection and Research on Weak Overlaying Rock Failure Regularity Under the Condition of Fully Mechanized Mining

In order to find the possibility and safety of coal exploitation under water with reduced waterproof pillar at upper limit,the vertical boreholes were drilled from the surface to detect overlaying rock failure.The experiments showed that the height of weak overlaying rock failure is lower and only about 50% conventional height values under the condition of inclined longwall fully mechanized mining.It provides an important reference to coal exploitation with reduced waterproof pillar at upper limit in other coal mines with similar conditions.