【摘要】 为研究试样形状对含有倾斜软弱夹层的复合岩体力学性质与破坏模式的影响，对长方体、圆柱体两种复合岩体试样进行了单轴压缩试验。研究结果表明：试样形状引起了软弱夹层破坏形态的不一致，圆柱体试样中倾向于产生斜裂纹破坏并引起复合试样侧向滑移，长方体试样倾向于产生端部的剥落与颈缩破坏；软弱夹层不同的破坏形态也导致硬岩初始压缩状态下的受压面积均存在不同形式的折减，实际受力出现不同情况的应力集中，长方体试样总体产生垂直于软弱夹层面发育的裂纹，圆柱体试样总体产生垂直于实际受压面发育的裂纹。同时，长方体试样无论是软弱夹层的弹性模量与峰值强度还是硬岩的峰值强度都明显高于圆柱体试样，但是应力分布相较圆柱体试样也明显更不均匀。更多还原

【Abstract】 In order to investigate the influence of the sample shape on mechanical properties and failure characteristics of composite rock mass with inclined weak interlayer, the uniaxial compression testing was carried out considering the cylindrical and cuboid shaped samples. The results show that the failure characteristics of weak interlayer are not consistent due to the sample shape. Oblique crack failure, which is responsible for lateral slip of composite samples, tend to occur in weak interlayer of the cylindrical samples, while end spalling and neck shrinkage failure tend to occur in the cuboid samples. Meanwhile, the different failure characteristics of weak interlayer result in different reduction forms of compression area in the initial compression state of hard rock and conditions of stress concentration. The cracks in the cuboid samples develop perpendicularly to the weak interlayer surface, while in the cylinder samples develop perpendicularly to the actual compression surface. At the same time, both the elastic modulus and peak strength of the weak interlayer and the peak strength of the hard rock of the cuboid samples are significantly higher than those of the cylinder samples, but the stress distribution is also significantly uneven than that of the cylinder sample.更多还原