【作者】 刘义新；

【导师】 戴华阳；

【作者基本信息】 中国矿业大学（北京） ， 矿山空间信息学与沉陷控制工程， 2010， 博士

【摘要】 采深和松散层是影响矿区地表移动规律的重要因素。厚松散层下深部采煤引起的地表移动规律与一般条件下开采地表移动规律不同。通过对已有理论和厚松散层深部开采矿井地表移动实测资料分析,得出了厚松散层下深部开采地表移动和变形动态、静态分布规律和地表移动参数,并与一般条件下开采地表移动规律进行对比分析。利用相似材料模拟试验,研究了厚松散层下覆岩破坏规律,得出了松散层内部水平和竖向移动规律,对比分析了基岩移动盆地和松散层地表移动盆地,揭示了基岩与松散层岩移机理的差异；利用离散元2D-block研究了厚松散层下深部开采上覆岩土体的破坏场、应力场及位移场,得出了采动影响下松散层的传播规律；采用非线性大变形Flac3D分别就不同的松散层厚度和基岩厚度对地表移动规律的影响进行研究,揭示了松散层在地表沉陷中起到的作用,松散层和基岩的耦合关系。最后结合实例进行了应用研究。更多还原

【Abstract】 Mining depth and unconsolidated layers play the important role in affecting mining subsidence and movement law. Surface subsidence and movement law caused by deep mining under thick unconsolidated layers is different from under normal conditions’. By analyzing existing theory and surface movement measured data of deep mining and thick unconsolidated layers mine, static and dynamic surface movement and deformation distribution law and surface movement parameters due to deep mining under thick unconsolidated layers were obtained, compared with conventional surface subsidence law. Using similar simulation experiment, overlying bedrock and unconsolidated layers failure law reduced by mining under deep and thick unconsolidated layers were studied, the internal law of unconsolidated layers was reached, and the difference of bedrock movement basin and surface movement basin was compared and analyzed. Failure field, stress field and displacement field of overlying bedrock and unconsolidated layers were studied by using 2D-block, and displacement law of unconsolidated layers reduced by mining was reached out. The relationships of surface subsidence and different thickness of unconsolidated layers and bedrock were studied, and the consolidated layers in the role of surface subsidence, and the coupling relationship of the unconsolidated layers and bedrock, were revealed by using Flac3D. The research results were applied to field example.更多还原