【作者】 刘向峰；

【导师】 王来贵；

【作者基本信息】 辽宁工程技术大学 ， 工程力学， 2005， 博士

【摘要】 资源开采活动使矿区地层结构遭受损伤、抵抗破坏能力降低。调查表明,天然地震、采矿诱发地震对采动损伤地层内的地下结构破坏严重。开展矿区采矿损伤地层结构地震响应的研究,对分析采动损伤地层结构动力破坏的机理、提高矿区地下结构的抗震能力具有重要理论意义与现实意义。本文通过理论分析与数值模拟的方法对采动损伤地层及其地下结构的地震响应进行研究,主要内容包括:1、 综述了地震波在地层中传播规律的研究现状,并对岩石波速及地震波在岩石介质中衰减研究成果进行了总结。2、 利用ADPL语言对ANSYS程序进行了二次开发,在ANSYS中实现了粘弹性人工边界的设置及其相应的波动输入,对粘弹性人工边界的精度与稳定性进行了验证。3、 根据地震波在层状地层中的传播规律,编制了相应程序,对地层中软弱夹层对地面波动的影响进行了分析。4、 对断层出露场地和浅埋断层场地的地震响应进行了数值模拟,分析了断层产状变化对场地震动的影响情况。5、 进行了井下巷道地震反应的弹塑性分析,探讨了地震力作用下巷道围岩应力状态的变化规律。对不同围岩材料的巷道在不同频率地震波激励下的响应进行了研究,分析了围岩应力与波数之间的关系。在考虑了变围岩材料性质变化的情况下,探讨了巷道围岩的应力响应及位移响应与埋深间的关系。6、 将采矿煤柱及其顶底板结构简化为“哑铃”几何模型,讨论了地震波在模型内的传播规律,指出煤柱内地震波的强度与顶底板岩石介质波速、煤体介质波速、煤柱宽度、煤柱两侧采空区的宽度有关。7、 根据采空区顶板岩层的结构形式的变化,建立了多种采场模型。分别探讨了各模型在拉伸波与剪切波作用下顶板岩层的响应。更多还原

【Abstract】 Mining activities made mine stratum structure weaker. The investigation indicates that mining underground structures are damaged seriously by nature earthquake and mining induce earthquake. The works of studying on earthquake response of mining damaged stratum, will have great help to making the dynamic damage mechanism of underground structures clear, and then to find the methods to improve the dynamic stability of underground structures. The paper studied earthquake response of mining stratum and mining underground structures. The main study contents are as follows:1、The current advance of seismic wave travelled law in the rock medium are reviewed, and the research results of seismic wave attenuation and propagation velocity in rock are summarized.2、The ANSYS program is developed by ADPL, and made ANSYS program could be use to simulate the seismic wave propagation which based on the visco-elasticisy artificial boundary and corresponding wave-motion input method. The precision and stability of visco-elasticisy artificial boundary is proved by ANSYS program.3、According to the theory of seismic wave propagation law in layered stratum, a computer program is developed to analysis the effects of soften interlayer to site earthquake response.4、In the paper, the earthquake response of outcopping faults and shallow faults are simulated by numerical methods, and earthquake response of faults with different attitude are compared and analyzed.5、The elastic-plasticity numerical analysis of a tunnel model which subjected to earthquake waves loads is done to study the tunnel surrounding rock’s dynamic stress state. And, the paper discussed the relationships between the frequency of earthquake wave and the dynamic response of the tunnel surrounding rock with different mechanics characteristics, as well as the relationships between the tunnel surrounding rock’s dynamic response and the depth of tunnel.6、The floor rock stratum—coal pillar—roof rock stratum structure is simplified to a "dumbbell" model, the propagation law of seismic wave in the model is analyzed.7、According to the rock stratum structure styles of roof, several stope models is established to numerical simulated the earthquake response of roof rock stratum, and the dynamic stability of roof is discussed.更多还原