Seismograms and snapshot files for dynamic models (crack and shear sources)

This paper presents a numerical investigation on the influence of the
mining environment on seismic sources with a focus of pillar failure
mechanisms in tabular mining. We investigate the influence of the stope on
seismic inversions for the scalar moment, corner frequency, source radius,
stress drop and moment tensor through dynamic numerical modelling using
elastodynamic modelling software, WAVE3D. The main objective is to
determine whether the source parameters calculated from the recorded
waveforms are due to a combination of the stope source and the pillar
sources, rather than being related only to crushing of the pillar or
shearing in the pillar footwall. The main finding is that the presence of
stopes, and types of pillars, have a significant impact on the seismic
moment and other source parameters. This is important since moment is
viewed as a robust parameter on which seismic magnitude is often based,
however this study indicates that moments calculated for pillar failure in
a tabular stoping environments are less representative of the shearing or
crushing source than originally thought.