Seepage Simulation Method of Fractured Rock Mass Based on Coupling of Peridynamics and Finite Volume Method

Abstract:

Considering effectively reducing the amount of calculation without reducing the solution accuracy， and based on the principle of effective stress， a coupling method of finite volume method and peridynamics is proposed to simulate the hydraulic fracture propagation in saturated porous fractured media. First， the effectiveness of the method proposed is verified by a porous media seepage simulation example. Then， the ability and main characteristics of this method to simulate crack propagation in saturated fractured porous media driven by fluid are further verified by several numerical examples. The simulation of five working conditions shows that the confining pressure difference can induce the fracture propagation of hydraulic fracturing. At the same time， the numerical simulation results of the coupling method are compared with other numerical， analytical， or experimental results， which further indicates that the coupling method proposed can effectively simulate the mechanical propagation and rock fracture process.