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以水帘洞煤矿沿空巷道为工程背景,采用FLAC3D软件模拟,得到一面采空到两面采空及其转换过程中小煤柱和沿空巷道围岩应力分布特征,通过理论分析建立特厚煤层沿空巷道覆岩结构模型,对小煤柱和沿空巷道进行稳定性分析。对试验巷道回采期间支护方案进行设计和加固,并采用多种手段跟踪监测。结果表明,巷道支护设计有效,围岩应力、变形和顶板离层等控制效果良好。
Based on the engineering background of the gob-side entryway in Shui-dong tunnel, FLAC3D software was used to simulate the stress distribution characteristics of surrounding rock in the small coal pillar and gob-side entry roadway from the goaf to both sides goaf and its conversion process. By theoretical analysis, Empty roadway overburden structure model, stability analysis of small coal pillar and gob-side entryway. Design and reinforcement of the support scheme during the test of roadway and follow-up and monitoring by various means. The results show that the design of roadway support is effective and the control effect of surrounding rock stress, deformation and roof separation is good.