岩体工程力学参数取值方法研究Ⅱ:数值仿真试验

Study of determination methods of rock mass mechanical parameters Ⅱ: Numerical simulation test

针对复杂节理岩体力学参数确定的瓶颈难题,对复杂节理岩体数值仿真试验开展了深入系统的研究,提出了基于岩体结构面网络计算机模拟的岩体结构定量化表征方法,以及基于拓扑矩阵表达和虚拟节理处理的数值试样快速生成技术,通过在数值流形法中引入断裂力学理论建立了复杂节理岩体受力、变形、破坏、扩展直至贯通的全过程模拟方法,在此基础上构建了节理岩体数值仿真试验平台,为通过仿真试验确定节理岩体的工程力学参数提供了一条新的途径。

Aiming at the bottleneck problem of determining the mechanical parameters of complex jointed rock mass,the in-depth and systematic research on the numerical simulation test of complex jointed rock mass was conducted.Firstly,the quantitative characterization method of rock mass structure was proposed based on the joint network simulation,and the rapid generation technology of numerical sample was established based on the topological matrix expression and virtual joint processing.By introducing the fracture mechanics theory into the numerical manifold method,a numerical simulation method for the whole process of deformation and failure of complex jointed rock mass including propagation and penetration of cracks was established then.On this basis,a numerical simulation test platform is established for jointed rock mass,which provides a new approach to determine the mechanical parameters of jointed rock mass at the engineering scale.