Representation method of fractured rock mass based on stress-seepage coupling characteristics

It is defective to ignore the fracture characteristics while studying the hydraulical behavior for the natural geological rock. However, a fine description of the 3D model is often difficult for establishing the true 3D fracture rock mass system, especially for the characterization of pore and fracture system structure in general engineering problems. The mechanical properties of the fracture are described with elastic layer concept in the COMSOL Mutiphysics. Based on the generalized cubic law, the coupling characteristics of the fracture seepage are described through the weak form of PDE(partial differential equation) and the ECV (extrusion coupling variables). In addition, the characterization methods and numerical model for macro-fractured rock mass are also set up, which of reliability has been verified based on the previous single-fracture seepage test. Meanwhile, a more elaborate description of the numerical characterization methods in real rock mass has been obtained. ©, 2015, Northeastern University. All right reserved.