空场嗣后充填技术是金属矿山进行安全、高效开采的重要手段，对地压控制具有十分显著的作用。受充填工艺等因素的影响，充填体内部通常存在大量形态各异的原生宏细观缺陷结构，在受到爆破等动荷载作用时充填体内宏细观缺陷结构发生活化、扩展，引起充填体失稳、破坏。项目采用理论和现场/室内测试相结合的方法，研究动荷载作用下充填体宏细观缺陷结构界面形态及其对应力波传播的影响规律，构建基于应力波界面反射效应的充填体能量耗散模型；基于动力参数测试及大型循环剪切实验，阐明充填体缺陷结构形态特征与动力行为响应关系，揭示动荷载-缺陷结构耦合作用下应变强化与损伤弱化效应对充填体强度劣化的影响机制；采用实时动态宏细观结构观测系统，研究充填体细观缺陷结构动态演化机理，揭示充填体细观结构与宏观力学性能响应机制，提出动荷载-缺陷结构耦合作用下的空场嗣后充填体强度准则。研究成果可为空场嗣后充填技术在金属矿山的大规模应用提供理论支撑。

The open stoping subsequent filling technology has been acknowledged as an important method of safe and effective exploitation of metal mines due to its capability to efficiently control the underground pressure within a proper range. Massive primary macro- and micro-failures of various shapes are usually found inside the filling bodies, and this should be attributed to the applied filling technology, the stope’s surrounding, and other factors. When detonation and other actions exert dynamic loading, macro-micro failures within the filling bodies can be activated and expanded, resulting in the loss of stability and destruction of the bodies. Therefore, in order to maintain the stability of the filling bodies, it is significant to research the evolution and mechanism of the dynamic-loading-induced failure structures in the filling bodies. The research was conducted in three aspects: Firstly, the surface shape of the macro-micro failures in the filling bodies and the pattern of its influence on stress wave transmission were researched to provide the basis for construction of an energy dissipation model rooted in the stress wave interface reflection effect; secondly, the relationship between the features of the failure’s structural morphology and the dynamic behavioral responses was clarified, thereby exposing the mechanism of reducing the filling body strength with strain strengthening and damage weakening under the coupling of dynamic loads and failure structures; at last, the mechanism of the dynamic evolution of the microscopic failure structures and the response scheme for microscopic structures and macroscopic mechanical properties were clarified, and accordingly, the strength criteria of the filling bodies in open stopes under the coupling of dynamic loads and failures was proposed. The research achievements can theoretically support the massive application of the open stoping subsequent filling in metal mines.