... undercutting 7940 2 0-106 m Late undercutting 991 3 0-106 m Late undercutting 2549 4 106-226 m Early draw 7020 5 106-226 m Early draw 2400 3 METHOD In order to correlate SRM sample crack histories with the microseismic catalogue from the mine, in- dividual cracks are grouped into PFC seismic events...

... is comprised of the installation of a unique three-dimensional seismic array, further research and development of unique MEMS-based downhole seismic instrumentation, and implementation of software to locate and characterize underground seismic events associated with various rock damage mechanisms within...

... for this domed-shaped reservoir show some differences with the results predicted by simpler models founded on the assumption of a planar reservoir geometry. Predicted fault reactivation tendencies show a strong correlation to recorded seismic event locations. 1 INTRODUCTION During fluid production from...

... ABSTRACT ABSTRACT: A novel approach of ameliorating the seismic risk to off-reef infrastructure was developed for a relatively deep level gold mine. Mining is being carried out in an extensively geologically disturbed environment, which has resulted in numerous damaging seismic events...

..., a second seismic event was found within the recorded waveforms, triggering milliseconds later. The seismograms were processed accordingly, revealing a M2.7 event at a location approximately 300 m away. Figure 1. Seismic information for events M>1.5 from 4 to 21 October 2007. Seismic events #1 and # 2 were...

.... If there are an insufficient number of triaxial sensors, the seismic parameters may be affected by attenua- tion (due to mine voids) or by the seismic event en- ergy radiation pattern. Once there is an adequate number of triaxial sensors in the seismic array, add- ing addition triaxial sensors will not appreciably im- prove...

... for seismic events in hard rock mining. In block and panel caving mining there is always a need to better understand the caving propagation as well as the stress distribution on the undercutting and production drifts to assess production perfor- mances and long term stability of the production fa- cilities...