Formulation for the Coupled Mechanical-Hydraulic-Thermal Behavior Analysis in a Discontinuous Rock Mass(Stress Analysis).

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In rock masses, discontinuities of faults, joints, etc. exist and exert large influences on the mechanical property of rock masses. In the coupled problems of heat transfer, seepage flow and stress in discontinuous rock masses, analysis was made on the stress balance using the modified virtual displacement method and on the mass conservation and energy conservation laws using the integrated finite difference method. The analytic method makes possible the analysis using arbitrary polygonal elements via the Voronoi division and also the coupled analysis considering the openings and slides of rock mass joints. In this paper we describes the formulation with the stress balance, shear failure, tensile fracture, and the change of stiffness, and reports the simulation results of the elastic failure analysis and 3D analysis with a triaxial stress test.
日本地熱学会の論文