Analysis of Mine Blast Induced Vibration Signal for Mine Safety

Abstract

Computational study of blast induced seismic signal is important for better utilization of blast energy. .Generally thirty percent of blast energy is utilized in production process. Remaining seventy percent energy wasted in terms of vibration signal, noise and Sound. Mine safety is also very important aspect in addition to energy utilization and mine production. Vibration can be controlled by optimum blast design for specific site and through computational study of blast induced seismic signal. Blast design parameters like charge per delay may be selected by observing dominant frequency of vibration and peak particle velocity. Time frequency analysis of blast induced seismic signal gives added insight about the time and dominant frequencies present in time limited seismic signal. In our study we have de-noised and analyzed 60 blasts induced seismic signal using discrete wavelet transform and extracted dominant frequency present in the signal. A method has been proposed for safe blasting operation which reduces the risk involved in blasting due to vibration and increases the mine production by tuning the charge per delay and other design parameters in real time.