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为保障5103工作面运输巷的安全掘进,结合5103工作面岩层结构特征分析,运用FLAC3D进行了开挖数值模拟,得出了以下结论:C5煤层无上邻近层,布置底抽巷对C3煤层瓦斯治理效果较好,但底板破坏深度较深且布置在泥岩中增加维护难度;依据布置空间位置对比分析,高抽巷的钻场施工工程量较小;模拟了应力扰动区域范围,相应选择高抽巷的布置方式;5103运输巷左侧紧邻采空区煤柱,优化左侧钻场终孔间距以达到卸压与抽采的作用,最终保证了巷道的正常掘进。
In order to ensure the safe driving of the transport lane of 5103 working face, the excavation numerical simulation with FLAC3D is carried out based on the analysis of the rock strata structure characteristics of 5103 working face. The following conclusions are drawn: No adjacent upper story of C5 coal seam, The treatment effect is better, but the floor depth is deeper and arranged in the mudstone to increase the maintenance difficulty. According to the contrast analysis of the layout space position, the drilling engineering quantity of the high pumping roadway is small. The range of the stress disturbance area is simulated, Lane layout; 5103 transport lane on the left next to the coal pillars to optimize the left end of the drilling field spacing to achieve the role of pressure relief and extraction, and ultimately ensure the normal roadway heading.