The Numerical Value Experiment Study Of The Microcosmic Mechanism Of Effective Stress Law

Based on the Biot's effective stress theory, and with the method of numerical value experiment, the thesis has studied the microcosmic mechanism of affecting the effective stress coefficient, i.e the microcosmic mechanism of effective stress law by using the elasticity distortion's simulating software which is compiled with the method of finite elements. It has been done from the two aspects of affecting the elasticity distortion of rock comprising the insides causation which is the existing configuration of hole and cranny in rock and the outsides causation include the outside pressure and the liquid pressure inside the rock.The mostly content in this paper include the law of the influence upon the effective stress coefficient worked by the holes configuration which comprise the holes rate and the hole distributing , and the law of the influence upon the effective stress coefficient worked by the cracks configuration in rock which comprise the amount of cracks and the cracks distributing. By numerical value experiment, the variety laws of the effective stress coefficient worked by the cracks distributing, by the fractal dimension and the initial value have been work out. By referring to the formerly physical experiment datum and conclusion, the thesis has studied the influence upon the effective stress coefficient worked by the outside pressure and the liquid press inside rock and sum-upthe variety law of the effective stress coefficient with theoutside pressure and the liquid press. Finally, the thesis has discussed the using prospective and the exiting deficiency of study on the microcosmic mechanism of affecting the effective stress coefficient.The result of paper plays an important role in analyzing the stress characteristics and the stability of practice engineering rock masses and studying the penetrability law of rock.