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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5931

Title: Rockburst damage mechanism at Impala Platinum Mine
Authors: Ledwaba, LS
Scheepers, J
Durrheim, RJ
Spottiswoode, SM
Keywords: Seismicity
Rock engineers
Rockbursts
Seismic hazards
Impala Platinum Mine
Issue Date: May-2012
Publisher: The Southern African Institute of Mining and Metallurgy
Citation: Ledwaba, LS, Scheepers, J, Durrheim, RJ and Spottiswoode, SM. Rockburst damage mechanism at Impala Platinum Mine. Second Southern Hemisphere International Rock Mechanics Symposium SHIRMS, Sun City, South Africa, 15-17 May 2012
Series/Report no.: Workflow;9039
Abstract: Impala Platinum Mine (Impala), situated north of the town of Rustenburg in the North West Province of South Africa, has experienced an increase in seismicity from ~841 seismic events in the year 2005 to ~1588 seismic events in 2008. The Seismologists and Rock Engineers need to understand the underlying mechanisms and driving forces responsible for seismicity to develop and design mining layouts and support strategies to eliminate or mitigate the risks posed by rockbursts. However, most previous studies of seismicity conducted on Impala and other Bushveld Complex mines in the Rustenburg area provided limited information regarding the source parameters and mechanism due to insufficient data. The study is designed to investigate the seismic hazard on Impala Platinum Mine by means of two approaches: an investigation of seismic spatial distributions and the study of the rockburst damage mechanism of seismic events. A number of detailed investigations of rockbursts were conducted whereby damage was mapped and photographed. The investigations include reviews of the seismic history, short-, medium- and long-term seismic hazard assessment methods, and an analysis of the source parameters of the seismic event and associated ground motions. The study has revealed that most of the seismic events occur close to the reef plane, and are the result of the failure of a volume of rock that includes a pillar and the host rock that forms the foundation of the pillar.
Description: Copyright: 2012 The Southern African Institute of Mining and Metallurgy. Reproduced with permission from The Southern African Institute of Mining and Metallurgy.
URI: http://hdl.handle.net/10204/5931
ISBN: 978-1-920410-27-8
Appears in Collections:Mining and geoscience
General science, engineering & technology

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