【作者】 杨科；

【导师】 谢广祥；

【作者基本信息】 安徽理工大学 ， 安全技术及工程， 2007， 博士

【摘要】 针对地下开采采动应力和采动裂隙演化的复杂性、非线性、动态性及影响因素的多样性,本文以采场大范围三维围岩为研究对象,通过现场实测、相似模拟、数值模拟和理论分析等综合研究方法,对宏观应力壳和采动裂隙的演化及其影响因素进行了全面、系统研究。研究结果表明,应力壳分布形态近似为半空间椭球壳型,采动裂隙发育形态近似为半空间梯形锥体,采动裂隙分布及演化与一次开采煤厚和采场结构密切相关,揭示了采动裂隙演化特征和层厚效应。构建了应力壳和采动裂隙演化的分析模型及其演化的形态方程,获得了影响形态方程各参量的影响因素及相互间的关系、护巷煤柱对应力壳和采动裂隙演化的作用机理、应力壳失稳的判据,揭示了应力壳演化特征及其与采动裂隙的动态效应。研究成果对采场结构参数设计、采场围岩矿山压力控制、安全开采等工程实践具有重要的参考价值。更多还原

【Abstract】 According to the complexity, nonlinear, dynamic of evolving and the variety of effecting factor of mining induced stress and mining induced fracture (MIF) during caving, the evolving of macro stress shell (MSS) and MIF and those effecting factors are studied comprehensively and systemically by the integrated methods of on-site tests, material simulation, numerical simulation and theory analysis etc. in the extensive three-dimensional surrounding rock. The results show that the MSS configuration is an approximate half space ellipse-sphere-shell and the MIF is an approximate half space trapezium-cone and the distribution and evolvement of MIF are nearly relative with once caving thickness and mining frame parameters. The evolvement characteristics and mining height affection of MIF are opened out. The mechanic analyzing model and the reference frame of MSS and MIF evolvement are constructed and those configuration equations are educed. Based on the integrated analysis of evolving and equations of MSS and MIF, the factors and the relation among those; the mechanism of acting on MSS and MSS and MIF evolvement by coal pillar are obtained and the instability criterions are established. The MSS evolving characteristics and the dynamic affection between MSS and MIF are synthetically opened out .The results provide some important references on the mining frame designing, abutment controlling and safety mining and so on.更多还原