循环爆破振动下露天采场边坡动力响应研究OA

To reveal the dynamic response characteristics and vibration cumulative effect of slope structures under cyclic blasting,taking typical bench slopes of open-pit mines as the engineering background,a three-dimensional numerical model is established based on ANSYS/LS-DYNA.Numerical simulation is carried out combined with measured blasting vibration data,and the simulation results are compared with measured data to verify the reliability of the model.The influences of multiple blasting on vibration velocity and displacement responses in near-field and far-field areas of the slope are systematically analyzed,and the peak value evolution trends in three different directions are extracted.The results show that the vibration response in the near-field area increases nonlinearly with the increase of blasting times,while the far-field response gradually tends to be stable.The main propagation direction of blasting wave is obvious,and the vibration in horizontal tangential Z direction is the weakest.The simulation results are in good agreement with the measured data,which verifies the accuracy and applicability of the established model.The research findings can provide theoretical support and engineering reference for blasting vibration control and slope stability analysis.