沈北矿区深部煤巷破坏机理及支护对策研究
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摘要
通过对沈北矿区深部煤巷工程地质力学特性的现场调查和测试,确定了该矿区地应力分布规律,分析了典型深部煤巷的变形破坏特·点,得出了变形破坏的主要原因。利用数值模拟的方法再现了传统支护条件下巷道破坏过程,确定了影响其变形破坏的主控因素,认为传统支护材料无法适应深部煤巷的大变形支护,提出了以恒阻大变形锚杆为主体耦合支护对策。将该研究成果应用到清水煤矿深部煤巷支护实践中,采用恒阻大变形锚杆+钢带+底角注浆锚管耦合支护设计方案,在南二05运输顺槽进行了现场科学实验,取得了良好的应用效果,验证了新型恒阻大变形锚杆支护材料对深部煤巷大变形控制的有效性。
Through field survey and laboratory test the engineering geological conditions and rock mechanics characteristic of deep coal roadway in Shenbei Mining Area, the distribution law of in-situ stress are studied and the damage characteristics of deep coal roadway are analyzed. The main destruction reasons are concluded in the paper. Also the failure processes of traditional supporting methods are reappeared by numerical analysis and the main relative factors are proposed. The author holds that traditional supporting material is inadaptation of large deformation in deep coal roadway and the coupling support technology of constant-resistance large deformation bolt is put forward. The research results are applied to deep coal roadway supporting practice in Qingshui coal mine. The coupling support technology of constant-resistance large deformation bolt+steel mesh+corner bolt pipe is proved to be reasonable in the Naner05Transporting Crossheading. In addition, the new constant resistance large deformation bolt is effective to control the large deformation of deep coal roadway.
引文
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