复杂岩质边坡开挖爆破下的动力响应分析

Dynamic response analysis of blasting in excavation of complex rock mass slope

本文建立了能够反映空间层状岩石的正交各向异性及主要地质构造的三维动力有限元分析模型，该模型能较好地反映复杂岩体的主要性状．按照工程中常用的ＣｏｕｌｍｏｂＭｏｈｒ准则及最大拉应变准则分析了岩坡的破坏性态，给出了破坏单元的时空分布及瞬时安全系数场．利用所研编的计算程序对含有结构软弱层的岩体进行了模拟计算，得出了一些有益的结论．

A 3 D dynamic analysis model of finite element method is established which can be use to represent orthotropic of space layered rock and main geological structure.The model can reflect main behaviors of the complex rock,According to the Coulomb Mohr shear failure criterion and maximum tensile strain failure criterion of engineering,failure behavior of the rock slope is studied.The space time distribution of failed elements and transient field of safety factor are given.The analysis of simulating rock slope including a weak layer has been done by use of the computer program given in this paper.and some beneficial conclusions are obtained.