The occurrence of disasters in deep mining engineering has been confirmed to be closely related to the external dynamic disturbances and geological discontinuities. Thus, a combined finite-element method was employed to simulate the failure process of an underground cavern, which provided insights into the failure mechanism of deep hard rock affected by factors such as the dynamic stress-wave amplitudes, disturbance direction, and dip angles of the structural plane. The crack-propagation process, stress-field distribution, displacement, velocity of failed rock, and failure zone around the circular cavern were analyzed to identify the dynamic response and failure properties of the underground structures. The simulation results indicate that the dynamic disturbance direction had less influence on the dynamic response for the constant in situ stress state, while the failure intensity and damage range around the cavern always exhibited a monotonically increasing trend with an increase in the dynamic load. The crack distribution around the circular cavern exhibited an asymmetric pattern, possibly owing to the stress-wave reflection behavior and attenuation effect along the propagation route. Geological discontinuities significantly affected the stability of nearby caverns subjected to dynamic disturbances, during which the failure intensity exhibited the pattern of an initial increase followed by a decrease with an increase in the dip angle of the structural plane. Additionally, the dynamic disturbance direction led to variations in the crack distribution for specific structural planes and stress states. These results indicate that the failure behavior should be the integrated response of the excavation unloading effect, geological conditions, and external dynamic disturbances.

已证实深部采矿工程灾害的发生与外界动力扰动和地质不连续性密切相关。因此，采用组合有限元方法模拟地下洞室的破坏过程，深入了解受动态应力波幅值、扰动方向和倾角等因素影响的深部硬岩破坏机制。结构平面。分析了裂缝扩展过程、应力场分布、破坏岩石的位移、速度以及圆形洞室周围的破坏区域，以识别地下结构的动力响应和破坏特性。模拟结果表明，在恒定地应力状态下，动力扰动方向对动力响应的影响较小，而洞室周围的破坏强度和破坏范围随着动力荷载的增加始终呈现单调增加的趋势。圆形洞穴周围的裂缝分布呈现出不对称的模式，这可能是由于沿传播路径的应力波反射行为和衰减效应。地质不连续性显着影响了附近洞穴在动态扰动下的稳定性，在此期间，破坏强度呈现出随着结构面倾角增加而初始增加后减小的模式。此外，动态扰动方向导致特定结构平面和应力状态的裂纹分布发生变化。这些结果表明，破坏行为应该是开挖卸载效应、地质条件和外部动力扰动的综合响应。