【作者】 吴爱民；

【导师】 王家臣；

【作者基本信息】 中国矿业大学（北京） ， 采矿工程， 2010， 博士

【摘要】 研究深部近距离煤层群的开采对于深部煤矿资源的开采具有十分重要的意义。针对目前近距离煤层群开采偏重于岩石或者煤体的单体研究,本文着重从煤岩组合体的整体破坏出发,借助MTS研究了不同围压条件下近距离煤层群煤岩组合体的变形破坏,获得了煤岩组合体破坏时峰值强度的临界条件,并获得了峰值强度、泊松比和弹性模量等参数随围压的变化关系。矿井煤岩组合体的破坏是能量释放和能量耗散的综合作用结果,建立了不同围压作用下的基于能量释放的煤岩组合体的整体破坏准则,揭示了这种煤岩组合体整体破坏的物理力学机制。以此为基础,借用不连续变形分析,分别研究多次动压下近距离煤层开采对邻近层及煤柱的影响,并提出了近距离煤层群巷道的支护理念。现场监测数据与不连续变形分析(DDA)分析较为吻合,证实DDA方法将可为锚杆支护巷道的优化设计提供参考。更多还原

【Abstract】 It is great significance to investigate mining close coal seam in deep mining engineering of coal resources. The current emphasis of most relationship research on close coal seam is on the failure of single rock or coal. The dissertation focuses on the whole failure of the combination coal-rock sample. MTS experimental system has been employed to investigate the deformation and failure of close coal seam coal-rock samples under different confining pressures. And the relationship between critical condition of peak strength, Poisson’s ratio, and elastic modulus with confining pressure parameters has been obtained. The failure of coal-rock sample in coal mine is the coupled effects of energy release and energy dissipation. Therefore, a whole coal-rock failure criterion based on energy release theory under different confining pressures has been correspondingly obtained. And the physical mechanical mechanisms of the whole failure of coal-rock sample have been revealed. On this basis, based on Discontinuous Deformation Analysis, the effects of several dynamic pressures on the adjacent layer of coal mining and coal pillar have been simulated, and an optical supporting idea for tunnels in close coal seams has been presented. The simulation results based on Discontinuous Deformation Analysis (DDA) is more consistent with on-site monitoring data. This analysis confirmed that the DDA method can be used to optimize of bolting support design.更多还原