Author:Linzer, LM; Watson, BP; Kuijpers, JS; Acheampong, EDate:Mar 2002Results of SIMRAC project GAP 223 showed that stabilizing pillar-related back area seismicity was not related to the width of the pillar, nor to the dip spans of the stopes supported by the pillar. Pillar associated seismicity initiated in ...Read more
Author:Roberts, MKC; Lamos, RA; Murphy, SKDate:Apr 2004Most rock related fatalities and injuries in South African gold mines occur in the stope face area. These mines generally do not use rockbolts to support this area. This paper describes short rockbolt applications in the stope face area in a ...Read more
Author:Spottiswoode, SM; Linzer, LM; Majiet, SDate:Sep 2008The researchers analysed seismicity in two deep gold mines in terms of strain energy release during mining. Mining took place with regularly-spaced dip pillars and backfill for regional support. The mines were chosen to represent mining of ...Read more
Author:Hemp, DADate:May 1992This report is concerned with the analysis data from three sites during mining with and without backfill, in order to determine the effect that backfill on regional seismicity. Since the geology and stress fields in any two areas used for ...Read more
Author:Singh, M; Kijko, A; Durrheim, RDate:Oct 2011A first-order seismotectonic model was created for South Africa. This was done using four logical steps: geoscientific data collection, characterisation, assimilation and zonation. Through the definition of subunits of concentrations of ...Read more
Author:Goldbach, ODDate:Oct 1991This report looks at the ground motion from 24 small magnitude seismic events recorded at various points inside a backfilled stope. The in-stope ground motion is compared to that recorded at an off-reef site. The seismic events are analysed ...Read more
Author:Hemp, DA; Goldbach, ODDate:Sep 1990In this report the seismicity at three different sites was investigated during mining with backfilled and mining without backfill. In order to evaluate the effectiveness of backfill as regional support in reducing seismicity. The seismic ...Read more
Author:Vogt, D; Brink, VZDate:Oct 2013Although safety in South African mines has improved dramatically over the last ten years, falls-of-ground still constitute the single largest cause of fatalities. The data show that small falls of between 4 m(sup2) and 10 m(sup2), affecting ...Read more
Author:Johnson, RDate:Dec 1995A questionnaire related to mining at great depth and in very high stress conditions has been completed with the assistance of mine rock mechanics personnel on over twenty mines in all mining districts, and covering all deep level mines. The ...Read more
Author:Spottiswoode, SM; Roberts, MCKDate:Dec 2001A CSIR team visited the 94E1 panels mining the Carbon Leader Reef in the north-east corner of Tau Tona shaft pillar on the 14th December to study the damage due to a rockburst and to recommend any steps that might reduce the potential for ...Read more
Author:Riemer, KL; Durrheim, RJDate:Jun 2012The Kaapvaal Craton in South Africa hosts one of the largest gold placer deposits in the world. Mining in the Witwatersrand Basin here has been the source of about one third to one half of the gold ever produced in the world. Gold was discovered ...Read more
Author:Kuijpers, JS; Milev, AM; Jager, AJ; Acheampong, EDate:May 2002Seismicity causes the most severe loading conditions for tunnel support systems in deep-level South African gold mines. The design of such support systems should therefore incorporate the potential effect of seismicity on support requirements. ...Read more
Author:Spottiswoode, S; Napier, J; Milev, A; Vieira, FDate:Apr 2000This report describes a re-analysis of previous work on the relationship between ERR and seismicity. Data from four mines spanning the Ventersdorp Contact, Carbon Leader and Vaal Reefs were analysed using the MINF suite of programs (e.g. ...Read more
Author:Vogt, DDate:Nov 2011Mining research in South Africa dates back to the early days of the Witwatersrand gold fields: research into seismicity celebrated its centenary in South Africa in 2010, and advances in the understanding of seismicity and rock mechanics allowed ...Read more
Author:Ledwaba, LS; Scheepers, J; Durrheim, RJ; Spottiswoode, SMDate:May 2012Impala 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 ...Read more
Author:Malephane, H; Durrheim, RJ; Andreoli, MAGDate:Oct 2013The Namaqualand-Bushmanland region has numerous features that make it attractive for the storage of radioactive waste. In the late 1970s a programme to find a suitable site for low- and intermediate-level waste was launched and Vaalputs was ...Read more
Author:Goldbach, ODDate:Sep 2009Many South African gold mines will flood when they close, as the groundwater will gradually fill the mining voids. Preliminary investigations have shown that flooding of mines can generate increased levels of seismicity. Examples are given ...Read more