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Minimization of Blasting-Induces Vibrations in a Metal Mine Using Surface Wave Mitigation

 

Authors

Güzin Gülsev Uyar Aksoy, Cemalettin Okay Aksoy, Ozan Savas

 

DOI

Abstract

The impact of seismic waves on the environment is a major concern in rock blasting operations. Severe seismic vibrations have the potential to cause significant damage to nearby structures, buildings, open pit slopes within the mine and even leaching areas. Vibrations can compromise structural integrity and cause cracking. This study uses a non-conventional approach to effectively reduce blast induced vibrations. This study presents a method based on the principle of surface wave attenuation, which aims to minimise vibrations by considering the interaction of seismic waves with each other. To compare the conventional method with the innovative approach, two groups of blasts were conducted in a metal mine in Turkey using an electronic detonation system. In addition, a pilot blast was carried out to be used in the developed method. The seismic signal obtained from the pilot blast contains information about all the geological formations traversed from the source to the seismic recording site. Therefore, there is no need to model the geology separately in the group blast modelling, which is obtained by summing the pilot blast signal with the number of holes in the group blast. The inter-hole delays are determined by running the algorithm which consists of detecting the surface wave component of the seismic wave emitted by each hole in the group and determining the inter-hole delays to attenuate this high amplitude component at the target point. Analysis of the seismic data obtained by applying these delays shows that the positive effect of the surface wave attenuation method on the environmental impact of blasting and blasting efficiency is greater than that of the vibration attenuation methods using the classical method.

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