大倾角厚煤层综采面回采对邻近煤柱和掘进面的影响研究

为了研究大倾角煤层综采面回采对区段煤柱和下区段工作面回风巷掘进面的影响，采用数值模拟和现场监测的方法研究了区段煤柱的应力分布、回采面对掘进面的扰动情况。研究结果表明，大倾角煤层工作面应力集中区域与缓倾斜煤层明显不同，煤柱受到的工作面与煤柱侧叠加应力并非均匀分布，靠近上区段侧的应力集中明显高于下区段侧；当前南山煤矿B8煤层大倾角工作面20 m宽区段煤柱能够保持稳定，通过弹性核理论计算其合理区段煤柱宽度为18.4 m；回采工作面与相邻掘进工作面相距218 m时开始相互扰动，两面之间的最大扰动影响发生在回采面越过掘进面46 m时。

Research on influence of fully-mechanized mining face on adjacent pillar and driving face in steep thick coal seam

In order to study the influence of fully-mechanized face mining in steep seam on section coal pillar and return air roadway heading face of lower section working face，the stress distribution of section coal pillar and the disturbance of mining face heading face are studied by means of numerical simulation and field monitoring.The results show that the stress concentration area in the working face of large dip coal seam is obviously different from that in the gently dip coal seam.The superimposed stress on the working face and coal pillar side is not evenly distributed，and the stress concentration near the upper section side is significantly higher than that near the lower section side.At present，the coal pillar in the 20 m wide section of the large dip working face of B8 coal seam in Nanshan Coal Mine can remain stable.According to the elastic core theory，the reasonable section coal pillar width is 18.4 m.When the mining face is 218 m away from the adjacent heading face，it starts to disturb each other.The maximum disturbance effect between the two sides occurs when the mining face crosses the heading face 46 m.