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利用颗粒流软件构建了裂隙岩石的单轴压缩模型,模拟了含共面断续裂隙岩石的单轴压缩试验,并分析了裂隙倾角、裂隙长度、岩桥长度、裂隙摩擦系数对岩石破坏特征的影响。结果显示,上述4种因素对岩石破坏模式都存在影响,主要出现的破坏模式有:类完整岩石破坏模式、宏观剪切破坏模式、宏观张拉-剪切复合破坏模式、过渡型破坏模式。岩石峰值强度与裂隙倾角呈现出非线性特征,相对于裂隙长度呈现单调递减的趋势,相对于岩桥长度的曲线呈现上凸形态,相对于裂隙摩擦系数呈现单调递增的趋势。
A uniaxial compression model of fractured rock was constructed by using particle flow software to simulate the uniaxial compression test of fractured rock with coplanar fractures. The effects of fracture dip angle, crack length, rock bridge length and fracture friction coefficient on rock failure characteristics influences. The results show that the above four factors have an impact on rock failure modes. The main failure modes are complete rock failure mode, macroscopic shear failure mode, macroscopic tension-shear failure mode and transitional failure mode. The rock peak strength and fracture angle show a nonlinear characteristic, showing a monotone decreasing trend with respect to the fracture length. The curve relative to the length of the rock bridge shows an upward convex shape, showing a monotonous increasing trend with respect to the fracture friction coefficient.