Abstract:
In the case of mining in an inclined intrusion using the block caving method, the highest stress
is usually concentrated in the seismogenic and abutment zones, especially in the front of the
sloping area. In an inclined intrusion of more than 40°, the seismometer network is usually
distributed in the facility area where the footwall area is also located. This causes a limitation in
microseismic monitoring due to ray coverage. In this study, we conduct a seismometer
deployment outside a mining facilities area with borehole seismometers. The study aims to
maximize the resolution and minimize the monitoring uncertainty of underground mines. We
created two scenarios of seismometer deployment: (i) seismometers are deployed following the
intrusion mining level in the mining facility area; and (ii) additional seismometers are deployed
in off-facilities areas. Both areas were tested for their raypath responses and sensitivity using
the Checkerboard Resolution Test (CRT). The monitoring resolution influenced by the
additional borehole seismometers in the off-facilities area can be quantified. The results suggest
that the additional seismometers in the off-facilities areas can increase resolution by 30% in the
seismogenic and abutment zones.
Keywords: incline intrusion; stress; microseismic; Checkerboard Resolution Test (CRT)
