香源煤业近距离煤层联合开采巷道布置及支护研究

针对香源煤业的近距离煤层群开采的地质条件，为了优化香源煤业2#、3#、4#煤层联合开采的巷道布置方式及支护方案，综合采用理论分析、数值模拟与现场监测等手段和方法，通过探讨下部煤层巷道回采方式以及上煤层开采对下煤层的破坏程度的分析和计算，提出3#和4#煤层采用同向内错式布置且内错距至少3m，适当可增加错距。并结合矿井现场观测巷道围岩变形量，对于局部层间距变小、无法施工锚索时，提出采用“锚网梁+11#工字钢棚”支护。结果表明：提出的3#和4#煤层巷道布置方式更合理，优化后的巷道支护方案对维护巷道围岩顶底板区域效果明显，同时此研究结果也为其他相似地质条件的矿井合理进行回采巷道布置及支护提供了参考依据。

Study on Roadway Layout and Support of Close Coal Seam Combined Mining in Xiangyuan Coal Industry

According to the geological conditions of close distance coal seams of Xiangyuan Coal Industry, theoretical analysis, numerical simulation, field monitoring are combined to optimize the roadway layout and support scheme for the combined mining of coal seams 2#, 3# and 4# of Xiangyuan Coal Industry. By discussing the mining methods of lower coal seam roadway and the analysis and calculation of the damage of the lower coal seam caused by the mining of the upper coal seam, the paper puts forward that the coal seams 3# and 4# adopt the same directed and the inner dislocated layout and the inner dislocation distance is at least 3m, which can be appropriately increased. Combined with the mine site observation of the deformation of the surrounding rock of the roadway, it is proposed that when the local layer spacing becomes smaller and the anchor cable cannot be constructed, “the anchor net beam + 11# I-steel shed” should be adopted. The results show that the proposed roadway layout of coal seams 3# and 4# is more reasonable, and the optimized roadway support scheme has obvious effect on maintaining the roof and floor area of the surrounding rock. At the same time, the research results also provide a reference for other mines with similar geological conditions to reasonably arrange and support roadway.