2 edition of Fracture of rock at stope faces in South African gold mines found in the catalog.
Fracture of rock at stope faces in South African gold mines
N. C. Joughin
Written in English
Rockbusts associated with the formation of fractures at stope faces were studied in South African gold mines. A description of the types of fractures and their behaviour was given.
|Contributions||Jager, A. J.|
|The Physical Object|
|Pagination||p. 53-65 :|
|Number of Pages||65|
Used a lot by South African gold mining companies, this method can be used in both soft and hard rocks as the working area along the mining face can be supported artificially in places where the hanging wall shows a tendency to collapse. Longwall mining helps to extract ore along a straight front with a large longitudinal extension. Reaching extreme depths of two miles or more beneath the surface, mine safety incidents and related stoppages have plagued South African miners, with Gold Fields (NYSE:GFI) reporting another.
Abstract: A multi-disciplinary study of the response of the rock mass to mining and mining-induced earthquakes has been conducted in six gold mines in South Africa at sites deeper than 3 km, or with equivalent stress. More than 80 holes (with a total length of more than km) were drilled in earthquake-prone areas to locate faults and install : H Ogasawara, M Nakatani, RJ Durrheim, M Naoi, Y Yabe, H Moriya, GF Hofmann, C Stander, DP Roberts, P. With few new gold strikes around the world that can be turned into profitable mines, South Africa's gold miners are planning to dig deeper than ever before to get access to rich veins.
In , the English prospector J.H. Davis discovered the first gold in the Witwatersrand, leading to the South African gold rush and the discovery of much more gold deposits within the basin. South African Gold Miner Sued Over Mounting Fatalities J J Sibanye “accounts for nearly half of the 46 people reported killed at South African mines in and is already the subject of an investigation by the chief inspector of mines,” Bloomberg reported, as quoted in the complaint. Sibanye is the largest.
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Joughin NC, Jager AJ () Fracture of rock at stope faces in South African gold mines. In: Proc Symp Rockbursts: Prediction and Control, Trans Inst Min Me London, pp 53–66 Julià J, Nyblade AA, Durrheim R, Linzer L, Gök R, Dirks P, Walter W () Source mechanisms of mine-related seismicity, Savuka mine, South by: 5.
Petroscopic observation of rock fracturing ahead of stope faces in deep-level gold mines June Journal- South African Institute of Mining and Metallurgy G. Adams. For example, coseismic rock bursts in a South African gold mine produced pulverized "rock flour"as well as fracture patterns characteristic of dynamic fracturing (Stewart et al., ), and.
An analysis allows us to link the macroscopic characteristics of zonal rock fracture around a working with the non-Euclidean parameter. References: Adams, G.R. and Jager, A.J. () Petroscopic observations of rock fracturing ahead of stope faces in deep-level gold mines, Journal of The South African Institute of Mining and Metallurgy (June Author: Mikhail Guzev.
The Journal of The South African Institute of Mining and Metallurgy MAY/JUNE Basic principles for stable gullies in the gold and platinum mines of South Africa by K. Naidoo* and M.F. Handley† Synopsis Gullies are the vital in-stope excavations that provide access for mining personnel and material to, and mined ore from, theFile Size: KB.
in South African gold mines and the use of these characteristics in the prediction of rock falls by H. Gumede*,and T.R. Stacey* Synopsis The occurrence of fracturing due to high stress levels is a major factor in hangingwall stability in deep level gold mine stopes.
However, rock falls cannot be the result of these fractures alone. It has been well substantiated that for the most part the rock behaves as a continuous elastic mass. Thus, for these mining configurations at depth, large stress concentrations exist ahead of the stope with the consequence that the rock inevitably fractures.
Figure 1 shows the fractured rock at a stope by: 17* International Mining Congress and Exhibition of Turkey- IMCET©, ISBN Rock-Related Accidents, Investigations and Inquiries in South African Mines Department of Minerals and Energy Affairs of South Africa, Pretoria, Republic of South Africa.
The South Deep mine, Gold Fields’ only asset in the country, holds the world’s largest gold deposit after Grasberg in Indonesia and accounts for 60 percent for the company’s mineral reserves. Inthe English prospector J.H. Davis discovered the first gold in the Witwatersrand, leading to the South African gold rush and the discovery of much more gold deposits within the basin.
Although the Witwatersrand has been subject for decades of research, the genesis of gold and uranium ore is. A novel seismic moment tensor inversion approach is applied to microseismic events from the Kidd mine with moment magnitudes N.
and J ager, A. (), Fracture of rock at stope faces in South african gold mines. In Proc. Symp. Rockbursts: Prediction and Control eBook Packages Springer Book Archive; Buy this book on publisher's Cited by: South Africa’s gold production peaked at t inwhile employment on gold mines peaked atin the latter half of the s.
Mines reached depths exceeding km, the greatest mining depths in the world by far. However, rockbursts continued to claim scores of lives each year. Mining-related seismic events first caused serious. More than one in 10 gold mining jobs in South Africa may disappear after Sibanye Gold Ltd.
announced it’s joining AngloGold Ashanti Ltd. in looking to close unprofitable shafts to stem losses. South Africa gold mining companies face silicosis lawsuit. Gold mining goes back well over a century in South Africa. Although the sector is shrinking, the South African Chamber of Mines, an.
Mining companies are sifting through the detritus of a century-long gold rush in South Africa, scavenging through foot-high mounds of discarded ore for traces of gold they may still contain. south african national institute of rock mechanics chamber of mines of south africa certificate in rock mechanics part massive underground mining (hard and soft rock) syllabus ©copyright sanireFile Size: KB.
The death toll in South Africa’s mines increased to 88, surpassing the figure of 73, and ending nine straight years of falling fatalities in a country with an unforgiving : Reuters Editorial.
Did you know that eight of the ten deepest mines in the world are located in just one South African region. We bet you also didn’t know that most of these operations are focused on gold extraction.
To increase your mining knowledge, Mining Examiner brings you a new list today, this time about the 10 deepest pits in the world.
Also see Nature’s Deep Holes 1. Mponeng mine. SOUTH AFRICAN NATIONAL INSTITUTE OF ROCK MECHANICS CHAMBER OF MINES OF SOUTH AFRICA CERTIFICATE IN ROCK MECHANICS PART MASSIVE UNDERGROUND MINING (HARD AND SOFT ROCK) SYLLABUS.
This is a specific mining. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described, Pictorial sketch-book of Pennsylvania | Its scenery, internal improvements, resources, and agriculture, populary described The fourth part has separate t.-p.: Locomotive sketches, with pen and pencil.
b Gold Fields of South Africa, P.O. BoxJohannesburg, South Africa Received 2 April ; accepted 2 October Abstract The violent failure of a peninsular remnant at a depth of m below surface occurred in a mine in the Carletonville Goldﬁeld of South Africa, severely damaging a stope mining the Ventersdorp Contact Reef (VCR).THE SIGNIFICANCE OF ROCK FRACTURING IN THE DESIGN AND SUPPORT OF MINE EXCAVATIONS H.
Wagner and N. Wiseman Chamber of Mines Research Laboratories, P.O. BoxMarshalltownR.S.A. ABSTRACT Due to the specific nature of the stress field around mining excavations the volume of rock fractured as a result of mining is generally confined to the immediate Author: H. Wagner, N.
Wiseman. South Africa is home to the world's deepest goldmines. According to a report by Reuters, some 82 men, thought to have been illegal miners, died after an underground fire at .