裂隙网络模拟与REV尺度研究

Analysis of joint network simulation method and REV scale

研究了利用平面四边形模拟节理岩体三维裂隙网络的方法。在生成裂隙网络时,同时考虑结构面几何参数和力学参数的随机性。利用裂隙网络研究了确定岩体REV尺度的指标。在此基础上,编制了岩体裂隙网络模拟程序、裂隙网络图形输出程序和岩体REV尺度指标分析程序。通过算例分析,验证了研究成果及程序的合理性,并得出了岩体REV尺度约为各组裂隙中最大迹长期望值3-4倍的结论。研究成果为后续计算岩体等效力学参数奠定了基础。

The simulation method of rock mass joint network is studied.The randomness of geometric parameters and mechanical parameters of joint is taken into account in the generated joint network.In order to determine the representative element volume（REV） scale of rock mass,an index is defined by use of the generated joint network.On the basis of the above analysis,the codes for joint network simulating,for network plot outputting and for REV scale analyzing are developed.The rational analysis of the research results and codes is carried out through a case study.The results of a case study show that the REV scale is about three to four times of the maximum expected value of trace length of rock mass joints sets.The research results offer a basis of computation of rock mass equivalent mechanical parameters.