Study On Infiltrate Character And Coupling Analysis Of Seepage And Stress In Rock Failure Process

The interaction between seepage field of groundwater and stress field is called coupling of seepage and stress. Deformation, failure and its stability of engineering rock mass under this equivalent system of these factors are the common problems confronted by many engineering subjects. It is coupling action between seepage and stress makes the failure mechanism of rock very complex. The investigations on this problem have pervasive theoretical meaning and practical value.In order to study the influence of evolvement of Permeation Character induced by mesoscopic structural characteristics on macroscopic mechanical behavior and fracture mechanism, a nonlinear constitutive equations describing the relationship between damage of rock and seepage is proposed based on mesoscopic damage mechanics and Biot seepage mechanics theory and Coupling System of Flow & Solid in Rock Failure Process Analysis, F-RFPA2D, is developed to simulate the variation of permeability as well as coupling mechanism between seepage and stress during the initiation, propagation and coalescence of cracks in rock. This study also extends the research field of original RFPA2D.Centered on the investigation on the evolvement of permeability as well as the coupling action between seepage and stress, the following work is carried out:1. A further examination is given to classical Biot seepage theory to discover the basic assumption to form the coupling seepage equation, and discuss the variety of coupling equations between seepage and stress and their adaptabilities. The physical meanings, adaptability, testing method of seepage parameters used in equation of continuum are analyzed based on the experimental investigations on complete relationship between stress, strain and permeability of rock and engineering test on permeability of rock at different depth. Based on the percolation and conception of mutation...