人防、交通、矿业等工程中都会涉及到冲击载荷下层状岩体动力学问题。特别是在凿岩爆破过程中，存在爆破区域外岩体因层理面损伤而导致拉裂破坏以及破岩的有效能远低于总输入能等一系列问题，开展层状岩体的动态拉伸破坏能耗规律和损伤机理研究具有十分显著意义。本项目紧密围绕这一研究主题，利用SHPB实验系统，开展不同层理面倾角下岩石冲击损伤实验，获得层状岩体岩样的强度分布、全程应力-应变曲线、微观破坏形式和裂纹开展方式，分析动态拉伸强度、加载率、破碎程度、破坏形式和层理面倾角与能量耗散特征之间的规律，揭示不同层理面倾角作用下岩石冲击破坏机理和能量耗散规律。项目以冲击动力学、统计损伤力学理论、岩体结构力学、组合模型法和数值仿真等多种理论和分析方法为手段，确定损伤参量及描述方法，构建反映层理面破坏的动态拉伸损伤本构模型。本项目的研究成果将为动载荷影响下层状岩体工程灾害防治和提高能源利用率提供可靠的理论基础。

The problem of Layered rock mass dynamic has been a hotspot in civil air defense, transportation, mining and other engineering. With the rapid development of underground engineering in China, analyzing the layered rock mass tensile dynamics damage and energy consumption characteristics are inevitable issues, especially under the condition that the lack of tensile strength of rock damage and the effectively energy is far less than the total energy input during drilling and blasting processes. As closely related with the ring topic of mass dynamic tensile damage and energy consumption characteristics of layered rock, this project uses SHPB system to conduct rock impact damage experiments at various bedding plane angle thus obtaining the intensity distribution of the layered rock mass sample and the whole stress-strain curve, variation of dynamic tensile strength, failure strain, crushing degree and energy dissipation characteristics on bedding angle, strain rate and specimen size. These results attempt to reveal the influential mechanism for the damage failure mechanism and the energy law of rock at different bedding plane angle. Based on rock dynamic, statistical theory of damage mechanics, rock mass structural mechanics, portfolio model method and numerical modeling, the damage parameter and constructed rock dynamic damage evolution equation are to be established; meanwhile, the energy equation and constitutive equations are created while considering the effect of bedding surface. The above results will reveal the internal mechanisms for energy dissipation during the layered rock mass deformation and failure processes. Overall, this project can provide a theoretical support of preventing disaster of layered rock engineering with dynamic load and improving energy utilization.