Assessment of Blast-Induced Ground Vibration Frequency in Opencast Coal Mine: a Multivariate Statistical Regression Model

Abstract

The blasting is a useful technique to explore and extract the mineral resources. It gives desired output with several negative impacts in surrounding mining areas. The ground vibration is one of the most concern phenomena produced by blasting. The peak particle velocity and frequency assess the seismic hazard, risk, and the human discomfort. Frequency plays a key role to define the damage criteria limits and human discomfort. The frequency of blast-induced ground vibration depends mainly on amount of explosive, characteristic properties of rock mass and distance etc. A total number of 32 datasets have been recorded in the form of velocity components and corresponding frequencies such as; Radial, Vertical, and Transverse at an opencast mine ‘A’ located in Chhattisgarh. The Indian Standard developed the safe level of peak particle velocity at frequency range (<8Hz, 8Hz - 25Hz, >25Hz) for the various types of structures close to mine. An attempt has been made to establish the relationship among parameters such as; burden, spacing, stemming, charge, hole depth, hole diameters and distance, etc. by multivariate statistical regression analysis (MVSRA) for the prediction of ground vibration frequency. The Coefficient of Determinate (CoD) between measured and predicted frequencies has also been studied.