Study On Fractal Of Weak-Face And Mechanics Behavior Of Rock Masses Failure With Weak Face

There are many different scale weak-faces in rock masses. The existing of weak-face not only breaks the integrity but also affects the mechanics property and failure model of rock masses. Therefore it is insufficient only see rock as research object in study of failure and stability of rock masses. Appearance and direction of joint and weak-face, especially their mechanics property in rock masses is decisive in mechanics character of rock masses.Fractal character of fault surface is studied and analyzed with fractal theory N catastrophe theory and Similar material modeling FEM numerical simulation. At the same time the effect of fault surface on the failure regularity of rock masses is discussed. Stress-strain distribution regularity of rock masses with different fractal fault in mining condition is analyzed. Main works:Fractal and mechanism of forming fractal of fault surface in rock masses is analyzed and examined with it's affect on failure process of mining rock masses;Fractal curves are constructed with MATLAB to simulate the fault surface. Similar material modeling is carried out and the fractal weak-face effect of mining rock masses is studied.Mechanics character of rock masses with fractal fault in mining condition is simulated with large finite element software AN SYS;Catastrophe model of fault activated by mining is constructed with catastrophe theory.From the study we can see that: weak-face in rock masses is decisive in the mechanics character of rock masses; further more Fractal of weak-face has important effect on it. The result will promote the development of the theory of mining subsidence and rock slope.