A 2D,fully-coupled,hydro-mechanical,FDEM formulation for modelling fracturing processes in discontinuous,porous rock masses |
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| Institution: | 1. College of Civil and Transportation Engineering, Hohai University, Nanjing, 210098, China;2. Energy Geosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA |
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| Abstract: | This paper presents a new, fully-coupled, hydro-mechanical (HM) formulation for a finite-discrete element method computer code. In the newly-developed, hydraulic solver, fluid flow is assumed to occur through the same triangular mesh used for the mechanical calculations. The flow of a viscous, compressible fluid is explicitly solved based on a cubic law approximation. The implementation is verified against closed-form solutions for several flow problems. The approach is then applied to a field-scale simulation of fluid injection in a jointed, porous rock mass. Results show that the proposed method can be used to obtain unique geomechanical insights into coupled HM phenomena. |
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| Keywords: | Hydro-mechanical (HM) coupling Numerical modelling Finite-discrete element method (FDEM) Rock fractures Hydraulic fracturing Fluid flow |
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