【摘要】 基于孔隙-裂隙岩体的双重孔隙介质流-固耦合计算的微分方程,利用伽辽金有限元法提出了相应的有限元 公式,并基于岩体分类指标(RQD,RMR)提出了与岩体应力状态相关的渗透系数计算公式。编制了相应的有限元程序并给出了应用算例,将计算结果与相关文献作了比较。更多还原

【Abstract】 Based on the double porosity concept,an approach is presented to derive a set of coupled differential equations governing behavior of porous fissured media. The finite element technique and code are employed for the solution of these equations by using Galerkin FEM. The relations,relating rock classification rating RQD and RMR,are developed to define the changes of effective porosity and hydraulic conductivity that result from the redistribution of strains in disturbed rock mass. At last,a hypothetical example is presented,and the obtained results are compared to these of the previous work.更多还原