LINKING DIRECTIONAL STRAIN-DEPENDENT PERMEABILITY FIELDS TO A FULLY COUPLED THM MODEL
Relations that define changes in permeability due to the redistribution of stresses and strains in disturbed rock masses are incorporated into a fully coupled thermo-hydro-mechanical (THM) model. In each instance, changes in the directional permeability are determined from the pre-disturbance permeability, knowledge of the indices of Rock Mass Rating (RMR), and magnitudes of the strain distribution as calculated through the fully coupled THM model. These parameters allow permeability changes to be straightforwardly evaluated for a broad spectrum of rock mass qualities, including the representation of granular media. The model is applied to the analysis of permeability changes, which develop around an unlined circular excavation in a biaxial stress field, under different combinations of hydrological, thermal, and mechanical processes. Large increases in the tangential permeability and reductions in the radial permeability are shown to result. Some of these results are corroborated against the experimental observations reported in the literature.
Q L Liao J Liu X Li J C Sheng B H Brady W C Zhu J X Liu
School of Oil and Gas Engineering, The University of Western Australia Institute of Geology and Geop School of Oil and Gas Engineering, The University of Western Australia Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing 100029,P.R.China
国际会议
南京
英文
97-102
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）