Assessment of Blast-Induced Ground Vibration at Jinduicheng Molybdenum Open Pit Mine

Abstract

Ground vibration generated from blasting activities is a major problem in mine open-pit slopes and nearby properties, and it can endanger the inhabitants in the surrounding environment. To understand better the influence of blasting activities in the open-pit mine, it is important to determine the propagation and attenuation of the blast-induced vibration in open-pit slope. This paper presents a predictive model based on the Sadovsky equation for determining blast-induced ground vibration in the Jinduicheng open-pit mine, Shaanxi province, China. The field observation focused on providing measurements and data collected for the wave propagation with the influence of blasting activities. Empirical models were also used for predicting blast-induced ground vibration for comparison with the Sadovsky model. Blast design parameters such as maximum charge per delay and distance were considered as input parameters for prediction of blast-induced vibration. Site constants for different empirical equations were taken into consideration when determining the peak particle velocities in the Jinduicheng north slope. The performance indices of R2 (correlation coefficient), MSE (mean square error), RMSE (root mean square error), MAPE (mean absolute percentage error) and MEDAE (median absolute error) were calculated for the empirical models and the Sadovsky model. The results showed that the Sadovsky model is a more satisfactory model for predicting blast-induced vibration as compared to empirical models.