深井煤矿TBM组装硐室变形破坏机理及控制对策
Deformation and failure mechanism and controlling technology of tunnel boring machine installation chamber in deep-buried coal mines
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摘要: 为研究深井煤矿TBM组装硐室围岩破坏机理和优化其支护方案，以张集煤矿TBM组装硐室施工为工程背景，建立块体离散单元法数值模型，开展数值模拟，分析TBM组装硐室围岩变形破坏机理；基于现场监测数据与数值模拟结果，揭示TBM组装硐室变形破坏机理，采用了以全锚索支护和硬化底板为主的组装硐室修护与支护优化方案。结果表明：选用的组装硐室支护优化方案有效控制了围岩破坏和变形，且施工工艺简单，对TBM组装、始发工作影响较小。Abstract: In order to study the failure mechanism of surrounding rock of TBM assembly chamber in deep coal mine and optimize its support scheme, taking the construction of TBM assembly chamber in Zhangji Coal Mine as the engineering background, the numerical model of block discrete element method was established, and the numerical simulation was carried out to analyze the deformation and failure mechanism of surrounding rock of TBM assembly chamber. Based on the field monitoring data and numerical simulation results, the deformation and failure mechanism of TBM assembly chamber is revealed, and the optimization scheme of assembly chamber repair and support is adopted, which is mainly composed of full anchor support and hardened floor. The results show that the optimized support scheme of assembly chamber effectively controls the damage and deformation of surrounding rock, and the construction technology is simple, which has little impact on TBM assembly and launching.
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