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《Journal of Engineering Geology》 2010-02
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ANALYSIS TO ANGLE BY SHEAR FAILURE OF ROCK AND SOIL SAMPLES BASED ON FAILURE PROBABILITY

QIAN Haitao①② TAN Zhaoshuang③ SUN Qiang②④(①Institute of Crustal Dynamics,Chinese Earthquake Administration,Beijing 100085)(②Key Laboratory of Engineering Geomechanics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029)(③Limited company of Changjiang Sanxia survey Institute,Yichang 443003)(④School of Resources and Earth Science,CUMT,Xuzhou 221008)  
The research of angle by shear failure is a hot topic and key point in engineering geology,and the conventional analytic solutions are Mohr-Coulomb solution and Roscoe solution.Consider the fact that the macro-failure is controlled by the distribution probability of those micro-failures in samples,A failure probability model is introduced to analyze the rock and soil shearing failure angle,and then a Mohr circle of failure probability is given out on the base of a found that the principal axis of failure probability is the equal of the principal stress axis.Moreover,an analyses about the relation between micro-failure probability and Mohr-Coulomb failure criterion is carried out,and It's found that Mohr-Coulomb criterion is a statistical result of large number micro-failures in the failure progress and the Weibull model is only a special case of the distribution probability of failures,and so the failure model based on probability can accord with the failure criterions admirably.
【Fund】: 地震局地壳应力研究所基本科研业务专项基金(编号ZDJ2009-07)资助;; 中国科学院工程地质力学重点实验室2008开放基金资助;; 中国矿业大学启航计划
【CateGory Index】: P642
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