【摘要】 为了探讨不同倾角充填节理岩体在冲击荷载作用下的破坏机理，利用冲击试验结合数值分析方法，获取了节理岩体的动态破坏演化规律。结果表明：倾角α=0°、15°和30°时，岩样为劈裂破坏；α=45°时，沿节理面滑移剪切破坏；α=60°、75°时，为拉伸-剪切混合破坏，裂纹呈十字形分布；α=90°时，为劈裂-剪切混合破坏，裂纹呈“Y”形分布。应力分布是导致不同倾角节理岩样破坏模式差异的根本原因，拉应力集中诱发拉伸破坏，冯·米塞斯应力分布不均则主导剪切破坏。同倾角不同充填介质岩样的破坏模式相同，充填介质抗剪强度越低，节理处的破坏越严重；介质透射能力越低，入射端的破坏程度高于透射端。更多还原

【Abstract】 In order to explore the damage mechanism of rock mass with different dip angles under impact load, the dynamic damage evolution law of jointed rock mass was obtained by using impact test combined with numerical analysis method.The results show that, when α=0°,15° and 30°,the rock sample is split failure.When α=45°,the failure is sliding shear failure along the joint surface.When α=60°,75°,it is tensileshear mixed failure, the cracks are distributed in a cross shape.When α=90°,it is a split-shear mixed failure, the cracks distributed in a "Y" shape.The stress distribution is the fundamental reason for the difference in the damage pattern of rock samples with different dip angles, the concentration tensile stress induces tensile damage, and the uneven distribution of von Mises stress dominates shear damage.The damage pattern of rock samples with the same dip angle but filling media is the same, the lower the shear strength of the filling medium, the more serious the damage at the joint.The lower the transmission capacity of the medium, the higher degree of damage at the incident end than the transmission end.更多还原