锦屏一级水电站左岸岩体裂隙网络模拟

Fracture Network Simulation of Left Side of Jinping First Stage Hydropower Station

该文以锦屏一级水电站坝区左岸三维主干裂隙渗透性研究为出发点,在平硐裂隙测量统计的基础上,运用Monte-Carlo方法随机生成裂隙网络,并以Comsol script软件为平台,编写了裂隙网络圆盘模型的3D可视化程序,为等效-离散介质耦合渗流模型提供了物理建模的基础。通过两个不同高程中的5个代表性平硐实测裂隙对随机生成的裂隙进行拟合验证,证明随机生成的裂隙网络的合理性,模拟结果能够代表研究区主干裂隙空间关系,为岩体未知区域内裂隙的预测、岩体渗透张量的计算、岩体稳定性计算等工程地质研究提供了基础数据。

In this paper, taking the three dimensional main fracture permeability research on the left side of dam area of Jinping first stage hydropower station as the starting point, on the basis of adit fracture sur- vey statistics, using Monte-Carlo method to generate the fracture network randomly, and using Comsol script software as the platform, the three dimensional visualization program of fracture network disk model is compiled. It provides a physical modeling basis for equivalent-discrete medium coupling seepage mod- el. Through five typical adit measured fracture in two different elevations to fit and verify the random gen- erated fracture, the rationality of the random generated fracture network is proved. The simulation results can represent the space relationship of main fractures in the study area. It provides basic data for the pre- diction of rock fracture in the unknown area, the calculation of rock mass permeability tensor, rock mass stability and other engineering geological researches.