Use of FLAC3D for mining induced seismicity prediction

Abstract

ABSTRACT: This paper demonstrates the possibility of mining induced seismicity (MIS) prediction with FLAC3D that explicitly involves the time. The higher the rate of deposit extraction is, the more dynamic event occurrence is possible in vicinity of a moving face as a result of accumulation of potential energy due to rock mass deformation. Increase of the rate of longwall face advance shifts the state of surrounding rocks from equilibrium. The rate of advance has been calibrated in a numerical model using experimental data from extensometers displacement monitoring. Seismic factor calculation based on an idea that increase equivalent stress–its-derivate production builds up potential energy of rock mass deformation and raises probability of dynamic failure if the rate of the energy dissipation is low. Comparison of simulated seismic events distribution with experimental data demonstrated good agreement.