动力扰动诱发裂隙岩体破坏机理是岩体工程研究的重点和难点，也是保障能源、资源等众多岩体工程安全运营的前提和基础。裂隙分布的随机性和承受动力荷载的不确定性使得岩体动态力学性质具有随机性，也使得地下工程风险更难预测。本项目利用断裂力学、损伤力学、细观力学、分形几何和统计数学等，研究裂隙岩体动态破坏机理，分析动态岩体力学中的简单与复杂以及随机与确定的对立统一关系。基于3D打印技术，生成含有粗糙度非贯通裂隙类岩试件，利用动静组合霍普金森压杆研究裂隙岩体动态损伤演化规律及其各向异性；采用DEM-DFN耦合模型，生成重构岩体，确定岩体REV尺寸，通过Monte-Carlo随机模拟研究岩体动态力学性质的不确定性和随机性；基于细观损伤模型和随机理论，建立考虑裂隙时空效应的岩体动态损伤模型，并用于评价裂隙岩体稳定性。为岩体工程的安全施工和运营提供不可或缺的理论基础和技术支撑。

The failure mechanism of fractured rock masses induced by dynamic disturbance is a critical issue in deep mining, as well as the premise and foundation to ensure the safe operation of rock engineering such as energy and resources. The stochastic distribution of fractures and random dynamic loading contribute to the uncertainty of rock mass mechanical properties, resulting in unpredictable risks in rock engineering. Based on fracture mechanics, damage mechanics, micromechanics, fractal mechanics and statistical mathematics, the current project investigates the failure mechanism of fractured rock masses. It also involves the unity of opposites of simple and complex, and deterministic and stochastic in rock dynamics. Firstly, based on 3D printing technology, the rock-like samples with non-persistent and roughness fracture are generated to study the dynamic damage evolution law and anisotropy of fractured rock mass using coupled static and dynamic split Hopkinson pressure bar (SHPB). Secondly, based on a coupled DEM-DFN model, we reconstruct the rock mass model and determine the REV size for further investigation. Then the uncertainty and variability of rock mass dynamic mechanical properties are explored through Monte-Carlo stochastic simulation. Finally, a novel micromechanics damage model considering the temporal-spatial effect is proposed based on the micromechanics model and statistical mathematics. It will be applied to investigate the stability of fractured rock masses. Therefore, it provides an indispensable theoretical basis and technical support for the safe construction and operation of rock engineering.