【摘要】 为了研究煤矿采空区的地震动力响应及其对地表的影响规律,基于工程结构波动理论,从地震的加速度和位移变化角度,对煤矿采空区的地震动力响应及其对地表的影响进行系统的定量分析;得出了煤矿采空区地震波的变化。根据结构动力学理论,建立煤矿采空区岩层的动力学方程,利用有限元软件定量地研究了在不同工况下煤矿采空区场地在地震作用下的响应规律,得出如下结论:煤矿采空区的存在降低了地表的位移和加速度峰值,明显改变了场地地表的动力反应特性。岩土介质的松散度和破碎度得到增加,降低了地表的地震动力响应。更多还原

【Abstract】 In order to study seismic dynamic response of coal mine gob area and its influence regulation on ground surface,basing on the engineering structure fluctuation theory,we quantitatively analyze the seismic dynamic response of coal mine gob area and its influence regulation on ground surface from the changes of earthquake acceleration and displacement,and obtain the changes of seismic wave in coal mine gob area. According to the theory of structural dynamics,we establish a dynamic equation of the coal mine gob area,and quantitatively study the seismic response regulation of coal mine gob area under the action of earthquake in different work conditions by using the finite element software. The obtained results as follow: the existence of coal mine gob area reduces the surface displacement and acceleration peak value and changes the dynamic response characteristic of the ground surface obviously. Increasing the loose and broken degrees of geotechnical medium could reduce the seismic dynamic response of the ground surface.更多还原