【摘要】 针对深部采空区承受高静载同时受到周边采场爆破地震波扰动的具体情况,为研究采场围岩的稳定性,应用应力波方法分析了采空区围岩受到侧崩时的动力响应及充填的支护效果,采用有限差分软件FLAC3D模拟了安徽省铜陵的冬瓜山铜矿典型采场受到周边开采爆破侧崩时的动力特征及全尾胶充填的支护效果。分析结果表明:爆炸地震波传播过程中,围岩应力场受到扰动,采空区自由面振动速度幅值约为围岩内部的2倍,围岩产生新的塑性变形,质点位移增加;对采场进行充填能够降低接触面振动速度,减少围岩塑性变形及质点位移,从而保护了采场间柱,提高采场围岩稳定性。更多还原

【Abstract】 The deep stoped-out areas in a mine are subjected to high pressure and the blasting vibration around stopes will disturb it.In order to analyze the stability of the stoped-out areas,the stress wave method is used to analyze the dynamic response of the stoped-out areas under lateral impact and the filling support effect and the finite difference program FLAC3D is used to simulate the dynamic characteristics under mining and blasting and the filling support effect of a typical stope of the Dongguashan copper mine in Tongling of Anhui Province.The results show that the rock stress field is disturbed through the spreading of the blasting seismic wave,the free surface’s vibration velocity is about twice that of the wall rock,the new plastic deformation appears and the particle displacement of the free surface increases.The application of fillings will inhibit these phenomena,besides,the insulating pillars are protected and the stability of stopes is improved.更多还原