Seismic peak partcile velocity and acceleration response to mining faces firing in a light of numerical modeling and underground measurements

TL;DR

This paper investigates seismic vibrations caused by mining blasts in a copper deposit, combining numerical modeling and underground measurements to understand particle velocity and acceleration responses.

Contribution

It introduces a combined numerical and experimental approach to analyze seismic responses from mining blasts, enhancing understanding of vibration amplification effects.

Findings

Numerical models accurately predict seismic responses to blasting.

Field measurements confirm amplification of vibrations during simultaneous firing.

The study provides insights for improving blast design to mitigate seismic hazards.

Abstract

Extraction of the copper ore deposit in the Legnica-Glogow Copper Basin in Poland is usually associated with high seismic activity. In order to face this threats, a number of organizational and technical prevention methods are utilized, from which blasting works seem to be the most effective. A significant number of recorded dynamic events may be clearly and directly explained by the effects of this approach. It is also expected, that the simultaneous firing of a number of mining faces may provide the amplification of vibrations in a specific location chosen within the rock mass. For better recognition of a such process, formation of an elastic wave generated by the detonation of explosives in a single mining face have been evaluated using the numerical tools and verified by the field measurements of ground particle velocity and acceleration parameters, i.e. PPV and PPA parameters. The primary objective of presented paper was to find the bridge between numerical simulations of the time-dependent seismic particle velocity values induced by blasting and in situ measurements using seismic three component geophones