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Browsing by Subject "Rock bursts"

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Delineation of rockburst fractures with ground penetrating radar in the Witwatersrand Basin, South Africa

Author: Grodner, M Date: Sep 2001 The depth of mining in the gold mines of the Witwatersrand Basin, South Africa is continuously increasing, with several mines already stopping at depths exceeding 3500m. Due to the high stresses imposed on the rock mass in these deep level ... Read more
Develop a more reliable means of assessing safety risk due to rock bursts and rock falls as a managerial decision support technique

Author: Chichowicz, A Date: Jan 1997 The project was initiated to create techniques for processing falls of ground (FOG) data. Those techniques were tested with data from east rand proprietary mines (ERPM). The first part of this report concerns seismic events that caused falls ... Read more
Develop and implement preconditioning techniques to control face ejection rockbursts for safer mining in seismically hazardous areas

Author: Toper, AZ ; Stewart, RD ; Kullmann, DH ; Grodner, M ; Lightfoot, N ; Janse van Rensburg, AL ; Longmore, PJ Date: Jan 1998 This research report discusses the development of preconditioning techniques to control face bursts, for safer mining in seismically hazardous areas. Preconditioning involves regularly setting off carefully tailored blasts in the fractured ... Read more
Improvement of worker safety through the investigation of the site response to rockbursts

Author: Hagan, TO ; Milev, A ; Spottiswoode, SM ; Vakalisa, B ; Reddy, N Date: Dec 1998 The objective of this investigation is to improve worker safety through a better understanding of mine excavation response to rockbursts. The improved understanding should lead to improved mine layout and support design. The project is ... Read more
Improvement of worker safety through the investigation of the site response to rockbursts.

Author: Durrheim, RJ ; Milev, AM ; Spottiswoode, SM ; Vakalisa, B Date: Dec 1997 Rockbursts are a major hazard in South African deep-level gold mines. The severity of damage due to a seismic event often varies greatly over small distances. The goal of this project is to discover the reasons for this variation in the ... Read more
Improvement of worker safety through the investigation of the site response to rockbursts.

Author: Hagan, TO ; Milev, AM ; Spottiswoode, SM ; Vakalisa, B ; Reddy, N Date: Dec 1998 The objective of this investigation is to improve worker safety through a better understanding of mine excavation response to rockbursts. The improved understanding should lead to improved mine layout and support design. The project is a ... Read more
Meaningful use of peak particle velocities at excavation surfaces for the optimisation of the rockburst criteria for tunnels and stopes.

Author: Milev, AM ; Spottiswoode, SM ; Noble, BR ; Linzer, LM ; Van Zyl, M ; Daehnke, A ; Acheampong, E Date: Mar 2002 The aim of this project is optimization of rockburst support systems by the systematic evaluation and quantification of the peak particle velocity recorded underground. Read more
Modelling seismic waves around underground openings in fractured rock

Author: Hildyard, MW ; Young, RP Date: 03 Jan 2002 The potential for large excavation-induced seismic events may be recognised, even if the timing of an event may be inherently unpredictable. In this case, modelling the wave propagation from a potential event could allow the dynamic motions ... Read more
Observational study to mitigate seismic risks in mines: a new Japanese-South African collaborative project

Author: Durrheim, RJ ; Ogasawara, H ; Nakatani, M ; Yabe, Y ; Milev, A ; Cichowicz, A ; Kawakata, H ; Moriya, H ; JST-JICA SA Research Group Date: Sep 2009 Mining-induced earthquakes pose a hazard to workers in deep South African mines, while natural earthquakes pose a hazard to people living close to plate boundaries. Researchers introduce a 5-year Japanese-South African collaborative project ... Read more
Study of rockburst source mechanism

Author: Ortlepp, WD Date: Jun 2000 The research project comprising GAP 524 involved detailed examination of a group of 3 rockburst ruptures or burst-fractures discovered in a VCR stope panel on a peninsular remnant on Mponeng Mine at a depth of 2550m below surface. A careful ... Read more
Support technologies to cater for rockbursts and falls of ground in the immediate face area, volume 1.

Author: Daehnk, A ; Acheampong, E ; Reddy, N ; Le Bron, KB ; Haile, AT Date: Mar 2000 The aim of this project is to investigate temporary and face area support systems (with special reference to the use of tendon support). Improved face area support design methodologies are proposed, and a probability analysis is conducted to ... Read more
Survey and assessment of techniques used to quantify the potential for rock mass instability.

Author: Brink, AVZ ; Hagan, TO ; Spottiswoode, SM ; Malan, DF ; Glazer, SN ; Lasocki, S Date: Mar 2000 The development of techniques to quantify the potential for rockmass instability that may result in rockbursts, has been a priority for researchers in the South African gold mining industry for some decades. These techniques include numeric ... Read more
Violent failure of a remnant in a deep South African gold mine

Author: Durrheim, RJ ; Haile, A ; Roberts, MKC ; Schweitzer, JK ; Spottiswoode, SM ; Klokow, JW Date: 15 Apr 1998 The violent failure of a peninsular remnant at a depth of 2300 m below surface occurred in a mine in the Carletonville Goldfield of South Africa, severely damaging a stope mining the Ventersdorp Contact Reef (VCR). At the rockburst site the ... Read more
Workplace: Geo physics

Author: Kataka, M ; Khomo, I Date: Jan 2007 The mining indusrty has become one of the successful industries. Geophysics is a branch of Geology and it involves the study of rocks and minerals. The profession of Geology has become critical over the years to the economy of many countries. ... Read more

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Browsing by Subject "Rock bursts"

Browsing by Subject "Rock bursts"

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