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SEISMIC PEAK PARTCILE VELOCITY AND ACCELERATION RESPONSE TO MINING FACES FIRING IN A LIGHT OF NUMERICAL MODELING AND UNDERGROUND MEASUREMENTS

W. Pytel, P. Mertuszka, A. Lurka, K. Fulawka, M. Szumny
Thursday 11 October 2018 by Libadmin2018

ABSTRACT

Extraction of the copper ore deposit in the Legnica-Głogow 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.

Keywords: rock mechanics, blasting works, seismic measurements, numerical modelling


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