Abstract
In this paper, a thermo-hydro-chemo-mechanical coupling peridynamic model of fractured rock mass is proposed to simulate the fluid-driven crack and the characteristics of water pressure and temperature under thermo-hydro-chemo-mechanical coupling condition. Firstly, the coupling model is employed to simulate the thermo-hydraulic coupling consolidation problem of rock samples, and its accuracy is verified by comparing with the analytical solution and the previous numerical results. Secondly, the coupling model is employed to simulate the problems of fluid-driven crack and chemical corrosion, and the present numerical results are in good agreement with those obtained by the phase field method. Finally, thermo-hydro-chemo-mechanical coupling peridynamic model is used to simulate the process of geothermal extraction, and to investigate water pressure and thermal field distribution.