中文摘要：

动态分析步和在 3 种尺寸(FLAC3D ) 的快 lagrangian 分析 ofcontinua 的一般流动被讨论。为稳定性上的挖掘和爆炸颤动的影响的数字模拟我的外面，区域与 FLAC3D 被执行。整个分析过程被划分成二步，包括静态的分析和被用来分别地模仿挖掘过程和爆炸颤动的影响的动态分析。恰好上面的边界的形状在挖掘以后是极其不规则的结果表演，和压力集中在许多地方发生，更高张力的应力出现。Themaximum 张力的应力比岩石质量的张力的力量高，并且包围岩石正确房顶将与紧张骨折被损坏。在挖掘以后包围岩石 is4.75 公里的最大的排水量。然而，最大的排水量在爆炸以后增加到 5.47 公里动态负担被使用。并且塑料地区的盖住的区域显然膨胀，特别在恰好上面的斜坡的脚。分析结果在有总体上的观察结果的基本一致。损坏，在某种程度上包围岩石上的骚乱被挖掘引起，当爆炸动态负担进一步增加动态不稳定性 anddest 吵闹的出现的可能性时。有效支持和减少措施的颤动应该因此在采矿期间被拿。

英文摘要：

Dynamic analysis steps and general flow of fast lagrangian analysis of continua in 3 dimensions （FLAC3D） were discussed. Numerical simulation for influence of excavation and blasting vibration on stability of mined-out area was carried out with FLAC3D. The whole analytical process was divided into two steps, including the static analysis and the dynamic analysis which were used to simulate the influence of excavation process and blasting vibration respectively. The results show that the shape of right upper boundary is extremely irregular after excavation, and stress concentration occurs at many places and higher tensile stress appears. The maximum tensile stress is higher than the tensile strength of rock mass, and surrounding rock of right roof will be damaged with tension fracture. The maximum displacement of surrounding rock is 4.75 mm after excavation. However, the maxi- mum displacement increases to 5.47 mm after the blasting dynamic load is applied. And the covering area of plastic zones expands obviously, especially at the foot of right upper slope. The analytical results are in basic accordance with the observed results on the whole. Damage and disturbance on surrounding rock to some degree are caused by excavation, while blasting dynamic load increases the possibility of occurrence of dynamic instability and destruction further. So the effective supporting and vibration reducing measures should be taken during mining.