Vibration control in an opencast mine based on improved blast vibration predictors

Vibrations due to rock blasting are studied based on the data measured on several test structures at the West Mudidih Opencast Project of BCCL, India. A single-, as well as a two-storey brick structure, a mud house and concrete walls were constructed on the edge of the working area. All the existing ground vibration predictors including the two modified predictors of Ghosh-Daemen were tested against the data recorded. A new model is proposed as a blast vibration predictor. This model is simple and an improvement on existing vibration predictors, in that it gives a better index of determination and consistent charge/delay.