Abstract
An idealized double porosity model is developed for the purpose of studying the coupled effects of flow in porous blocks and fractures as well as solid displacement in saturated-unsaturated medium.Subsequently, Galerkin formulation is used for the finite element method to develop a new technique to investigate coupled hydraulic-mechanical behavior in the double porosity model reservoir.The verifications are performed in comparison with an analytical solution of one-dimensional consolidation problem and experimental results of unsteady flow in the sand box. Finally, a secondary compression is examined with this model, the environment of rock mass in Lugeon test is simulated, and two-dimensional consolidation problems in a saturated and saturated-unsaturated media are investigated with comparison with the single porosity model.
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