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中文摘要：
为了深入研究节理裂隙岩体的破坏机理,基于Mohr-Coulomb准则,利用（PFC）离散元程序,引入颗粒接触连接本构关系,建立了含孔洞岩样Burgers蠕变模型,以数值模拟的应力-应变曲线与试验曲线吻合作为PFC细观力学参数选取的准则,并利用获得的力学参数对含孔洞节理岩体破坏过程进行数值再现,模拟了不同颗粒单元参数试样的宏观变形、损伤、破坏过程,同时验证了所建立的岩样Burgers模型在岩体损伤破坏领域应用的可行性。算例部分利用所建立模型对含孔洞节理岩体在加载条件下的破坏机制进行了讨论,该破坏机制可以用于实际工程的破坏模式预测和岩体工程的稳定性评价。
英文摘要：
To analyze the failure mechanism of the jointed and fractured rock mass,the Burgers creep model of rock with holes has been built by discrete element program（Particle Flow Code）.In which Mohr-Coulomb Failure Criterion and Particle contact constitutive relationship are employed.The unification of stress-strain curves obtained by numerical simulations and test results has been used to select micro-level mechanical parameters of PFC,and these selected mechanical parameters are used to model numerically the failure process of the jointed rock mass with holes.Macro-level deformation,damage and failure process of rock samples with different particle unit parameters are achieved.At the same time,the feasibility of the Burgers Model for rock samples in the damage field of rock mass is verified.Finally,using the developed model,the failure mechanism of the jointed rock mass with holes under loading conditions is discussed.The failure mechanism can be reasonably applied to the prediction of failure modes in actual engineering practices and the stability evaluation of the rock mass engineering.
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