Rock Bursts

Peak particle velocities at excavation surface rockburst support criteria
The aim of this project is optimisation of rockburst support systems by the systematic evaluation and quantification of the peak particle velocity recorded underground. To achieve this goal, a number of research tasks were carried out.
Mine-wide continuous closure monitoring system
Methodology computer program for applying improved inelastic ERR
 Use of the mine layout design criteria of ERR (Energy Release Rate), APS (Average Pillar Stress) and ESS (Excess Shear Stress) have not provided a good control of seismicity.  It has become apparent that more complex models of
Managing Rockburst Risk
Loading system stiffness of fault slip events
Loading for crush pillars and dynamic response
The objective of this work was to develop a design methodology for crush pillars under different loading conditions in South Africa’s gold and platinum mines.  To achieve this, the variations in crush pillar characteristics were
Leadlag design and seismicity patterns
South African tabular gold mining operations typically involve different mining advances in adjacent panels, resulting in panels “leading” or “lagging” each other. It is believed that the lead- lag distance between
Investigation of system to provide early warning of roof falls
ISS International was contracted by SIMRAC to conduct a pre-feasibility investigation regarding the association of electromagnetic emissions and acoustic/ultrasonic emissions with rock failure. The presence of such emissions as a result of
Interaction between ground motion and ground support
The observed and theoretical responses of timber packs were analyzed. A set of data collected from Mponeng Mine provides an insight into the response of support units under seismic load. The most important accomplishment of monitoring is
Integration of seismicity and numerical modelling
The main objective of the research project SIM 020301 was to investigate improved criteria for the evaluation of deep-level tabular mine layout design using integration of seismicity and numerical modelling. The final report covers three