Propagation and prediction of blasting vibration on slope in an open pit during underground mining

In order to assess the influence of underground mining blasting on the stability of open pit slopes and control the potential risk, it is crucial to investigate the propagation and attenuation of blasting vibration in rock slopes. In this paper, we aimed to investigate the attenuation of blasting vibration on open pit slopes subjected to underground mining activities using Daye Iron Mine as an example. To this end, we first analyzed the characteristics of blast loadings using the dynamic finite element method. We then established a three dimensional (3D) numerical model for open pit subjected to underground mining and proved its reliability using the field monitoring data. Next, we calculated and analyzed the distribution characteristics of peak particle velocity (PPV) by inputting the obtained blast loadings into the numerical model and discussed the impacts of blasting vibration on open pit slopes subjected to underground mining. To better and more conveniently assess and predict the impacts of blasting vibration, we further established a mathematical model to describe the attenuation of PPV on open pit slopes subjected to underground mining blasting through theoretical analysis and proposed a PPV predicting model for slopes in Daye Iron Mine based on the numerical simulations of underground mining blasting at different elevations.