ABSTRACT
Ground Support in Mining and Underground Construction-Villaescusa & Potvin (eds.) © 2004 Taylor & Francis Group, London, ISBN 90 5809 640 8
ABSTRACT: On April 2003, the El Teniente Mine, particularly the “Reservas Norte” sector, was afectted by a 3.0 moment magnitude and high radiated energy (3×108 J) seismic event. Extensive damage (25-70 m) was generated affecting galleries all levels of the Reservas Norte sector. This paper presents the seismicity characteristics and the estimation of the peak particle velocity in the near field of the main event. This velocity field were correlated with the generated damage, considering the existing different support types and the geotechnical rock mass qualitity. As the main conclusion, in general terms the support systems worked in agreement with the support design under the dynamic stress generated by the seismic events. This kind of analysis will allow us to improve the design and the support characteristics.
