The ability to analyse shear-wave anisotropy in a mine environment is great
ly aided by using multiple source orientations of a reproducible, impulsive
shear-wave source. The analysis of what is probably the first controlled s
ource shear-wave experiment in a mine environment demonstrates clearly that
shear-wave polarizations and time delays between split shear-wave arrivals
are reliably measured because of the use of multiple source orientations r
ather than a single shear-wave source. Reliability is further aided by mode
lling the shear-wave source radiation pattern, which allows for the unequiv
ocal discrimination between seismic raypaths where shear-wave splitting did
and did not occur. The analysis also demonstrates the great importance of
high reproducibility of the seismic source for the use of shear waves in ti
me-lapse surveys to monitor changes in a rockmass.