岩体是由许多结构面组成的复杂结构体，受到剪切破坏时常有裂隙产生。为了研究裂隙岩体在滑落时的规律，深入讨论工程岩体内摩擦系数等效参数，基于摩尔库伦强度准则，假定最小主应力与最大主应力σ1～σ3为线性关系，以内摩擦系数为核心推导摩尔库伦强度准则情况下的等效模型。在此基础上，利用ABAQUS有限元分析平台，嵌入所提的等效模型，模拟试验中不同倾向、倾角的楔形块体滑落时的状态，深入讨论和分析了相关参数，并与实验室模型试验结果进行比较，得出所提等效模型可用于表征裂隙力学特性分析，验证了该模型适用裂隙岩体稳定性分析的结论。%Rock mass is made up of many complex structural planes .Fractures usually appear due to the shear failure .In order to study the regularity of fractured rock mass during the sliding process of rock blocks ,the equivalent parameters of internal friction coefficient of rock mass was deeply discussed .Based on the Mohr-coulomb strength criterion , it is as-sumed that maximum principal stress and minimum principal stress (σ1~ σ3 ) were in a linear relationship ,so as to de-duce an equivalent model concentrating on the internal friction coefficient f .On this basis ,the proposed equivalent mod-el was embedded in the finite element analysis platform ABAQUS ,to simulate the sliding state of wedge block with differ-ent dip angles and directions .With a thorough discussion and analysis of related parameters ,the results were compared with the ones obtained in laboratory experiments and the conclusion was drawn that the proposed equivalent model can be used for the characterization of mechanical properties of joints .It is verified that the equivalent model is suitable for ana-lyzing the stability of fractured rock mass .This study will provide valuable reference for the stability analysis of rock mass in engineering .
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