【作者】 王志国；

【导师】 谢和平； 周宏伟；

【作者基本信息】 中国矿业大学（北京） ， 工程力学， 2011， 博士

【摘要】 本文借用物理模拟和数值模拟方法,采用分形几何、逾渗与重正化理论,系统研究了深部开采条件下上覆岩层采动裂隙演化规律及其移动破坏规律。综合采用相似模拟、离散元法模拟了多方案的上覆岩层移动破坏及采动裂隙分布,并实施了现场位移监测；采用分形几何理论进行了采动裂隙分形特性及演化规律研究；运用逾渗理论建立了以单元裂隙块体为基本格点的逾渗模型,分析了采动裂隙演化的逾渗特征；建立了采动裂隙演化的重正化群格子模型。研究成果表明：深部开采上覆岩层采动裂隙分布及演化具有分形特征,并受断层构造、煤层厚度等因素影响；采动裂隙演化过程具有逾渗特性,可通过重正化技术预测采动裂隙演化的相变临界性；通过室内外试验相结合方法研究得到了典型深部开采上覆岩层移动破坏的一般规律。从而建立了一套深部开采采动裂隙演化的综合研究方法。更多还原

【Abstract】 In this thesis, it was analyzed systematically that evolutionary law of mining induced crack in overburden strata and its movement and failure law in condition of deep mining, by mean of fractal geometry, percolation theory and renormalization group, in combination with physical analogue and numerical simulation. Analog simulation and discrete element method were integratedly used to simulate mining induced crack distribution in overburden strata and its movement and failure, and spot displacement survey was put to use. Based on the anslysis of distribution of mining induced crack, fractal geometry was employed to research fractal characters of mining induced crack and its evolutionary law, and by using of percolation model constructed with percolation theory taking unit crack block as basic lattice point, percolation behaviors of mining induced crack were analyzed, and renormalization lattice model of mining induced crack was established. Research results indicates that, mining induced crack distribution in overburden strata and its evolution have fractal behaivors and are influenced by fault occurrence, coalseam thickness and so on in condition of deep mining, evolution process of mining induced crack shows percolation characters to some extent, and phase transition criticality of evolution process of mining induced crack can be forecasted by renormalization technique, and general regularity of movement and failure of overburden strata in typical deep mining is obtained through similar model test and spot test. Thus a series of the comprehensive research methods are put forward to study the problem of evolution of mining induced crack in the condition of deep mining.更多还原