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将由室内试验资料提取的无胶结厚度含抗转动能力的岩石微观力学模型植入离散元软件,模拟非共面非贯通节理岩体的直剪试验,分析预制节理倾角、法向应力和节理间距对岩体力学特性和贯通模式的影响,并揭示相应的宏微观机制。结果表明:非贯通非共面节理岩体试样的破坏由节理端点处因拉应力导致的翼裂纹开始,随着剪切位移的增加,翼裂纹朝着最大压力方向扩展,并最终贯通岩桥;峰值剪切应力大体随着预制节理倾角的增加而增加,随着法向应力的增加而增加,随着节理间距的增加基本保持不变。
The micromechanics model of non-cemented rock with anti-rotation ability extracted from indoor test data was implanted into discrete element software to simulate the direct shear test of non-coplanar non-through jointed rock mass. The precast joint inclination, normal stress and joint spacing Mechanical properties of rock mass and through mode, and reveal the corresponding macro-micro mechanism. The results show that the failure of the non-through non-coplanar jointed rock mass specimen starts from the wing crack caused by tensile stress at the joint end point. As the shear displacement increases, the wing crack expands toward the maximum pressure and finally passes through the rock bridge The peak shear stress increases with the increase of prefabricated joints’ inclination and increases with the increase of normal stresses, but keeps the same with the increase of joint spacing.