Prediction of Safe Charge to Control Ground Vibration in Surface Mining

Abstract

Many researchers have proposed various predictor equations to determine the PPV (Peak particle velocity) which is the function of distance and maximum safe charge per delay. When the maximum safe charge per delay is calculated by different predictors its values vary because these predictors are formulated on different bases with limited observations. In this paper, an equation has been proposed for estimation of the maximum safe charge per delay and its performance has been compared with other predictors. The proposed predictor is the function of PPV and distance. Results were well correlated and near to the observed value. The maximum charge per delay has been calculated by all predictors and compared with the proposed one. The coefficient of correlation was found to be high for the proposed predictor. This may be give better prediction of safe charge as compared to other predictors for different rock litho units.

Study into blast vibration and frequency using ANFIS and MVRA

“…Higher P-wave velocity generates more ground vibration. The P-wave moves radially from the blast hole in all directions at velocities characteristic of the material being travelled through (Singh, 2006).…”

“…Only 25-30% of explosive energy is utilised for useful work and the rest is wasted in the form of ground vibrations, air blasts, back breaks, noise and fly rock, etc. (Khandelwal et al, 2005;2006;2007). Among these, the ground vibrations have the most detrimental effect on the nearby structures like buildings, dams, roads and natural slopes.…”