中文摘要：

采用相似材料模型对节理岩石进行分离式Hopkinson压杆试验.通过设置不同的节理厚度和加载速度,研究了冲击荷载作用下岩石动态抗压强度变化规律及相应的破坏形式,分析了节理厚度对应力波穿越节理时波动性质及能量耗散的影响,并从能量角度表征了岩石损伤变化规律.结果表明：随着充填物厚度的增加,节理岩石动态抗压强度逐渐降低,其破裂形式以张拉破坏为主,但节理介质的存在会影响岩石破坏程度,节理厚度的变化会导致相应的单侧破坏;相同入射能条件下,充填节理的厚度越大,岩石反射能力越强,透射波衰减幅度越大,能量耗散也越多;节理岩石的入射能和反射能随冲击速度的增大呈增长趋势,透射能则是先增大后减小,通过能量表征的损伤变量d随冲击速度呈弱幂函数增加关系d=-0.11v^2＋1.31v-3.01,损伤变量值越大,节理岩石破坏程度越高.

英文摘要：

In order to investigate the influence of dynamic mechanics properties of joint thickness on the rock,similar material models of jointed rock were applied in the separated Hopkinson pressure bar（SHPB）test.With the different joint thickness and loading speed,evolution law of rock dynamic compressive strength and failure form corresponded were studied under the impact loading,then the paper analyzed the variation of stress wave properties and energy dissipation when the stress wave cross different thickness jointed rocks and presented the damage evolution rule in the form of energy.The results show that the rock strength and dynamic failure form of jointed rocks are related to the thickness of joint fillings,with the increase of joint fillings thickness,rock dynamic compressive strength reduce gradually.The failure form of jointed rocks is mainly tensile fracture,but the existence of joint filling lead to change in the start point of failure,and cause unilateral destruction correspondingly.The reflected ability and the attenuation of transmitted wave increase with the joint thickness increasing under the same incident energy.Both the incident energy and reflect energy increase with the impact ve-locity,while the transmitted energy shows increasing at the beginning and decreasing later.The damage parameter d,expressed by energy,increases with impact velocity,as equation：d=-0.11v～2＋1.31v-3.01,and the fracture degree of joint rock will increase with the value of d.