Dolomite Guideline - DWS

2010-4-30  In South Africa the word ‘Dolomite’, where it denotes the rock type, has substituted the word ‘Dolomitic Limestone’. Dolomitic Limestone, as a natural rock, consists of the mineral dolomite (CaMg(CO 3)2)mixed with calcite (calcium carbonate, CaCO 3) and magnesite (magne-sium carbonate, MgCO

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A REVIEW OF THE DOLOMITE AND LIMESTONE

readily available in all major cities in South Africa and the SADEC region. The South African lime industry differs in three ways from other industrialised countries: firstly, limestone deposits in North America and Europe are widespread and of good quality, whilst in South Africa, isolated high-grade deposits of

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The risks associated with mines in dolomitic compartments

2009-8-26  Gold mining on the West Wits Line contains the biggest and richest mines in the Witwatersrand Basin (Robb, 1997). One of the most important aquifers in South Africa is the dolomitic aquifer of the West Rand and Far West Rand areas and it is in these aquifers that naturally occurring water is stored. The dolomitic rock is composed of the mineral

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Construction on dolomite in south Africa SpringerLink

Damage to structures and loss of life have been more severe on dolomite than on any other geological formation in southern Africa. The subsidence that occurs on dolomitic terrain following development or during dewatering has given dolomite a notorious reputation and engineers and geologists became reluctant to recommend development on the material.This has led to the pioneering of founding ...

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TECHNICAL PAPER Sinkhole and subsidence inStitution

2018-8-13  Karst-related sinkholes and sub- sidence events occur on areas underlain by dolomite ground in South Africa. Dolomite land occurs across several South Mpumalanga, Limpopo, North West and the Northern Cape. However, sinkhole formation in Gauteng Province poses a greater risk to infrastructure than in any of the other provinces to date.

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The seismic velocity distribution in the vicinity of a ...

2021-1-22  Thabazimbi, South Africa, shows variations in P-wave velocity in dolomite away from the de-stressed zone that vary between 4.4 and 7.2 kmrs, though values greater than 5.8 kmrs predominate along most of the profile.

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Sinkholes and subsidence in South Africa

2020-5-26  Certain parts of the ground surface of South Africa are prone to sudden, catastrophic collapse which may lead to death, injury or structural damage. Such features are known as sinkholes and in South Africa occur in areas underlain by dolomite rock. Approximately 25% of Gauteng Province, as well as parts of Mpumulanga, Limpopo, North West and Northern Cape Provinces, are underlain by

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Guidelines for Sinkhole and Subsidence Rehabilitation ...

2016-5-12  South Africa, sinkholes induced by the dewatering of dolomite groundwater compartments for gold mining caused the loss of life of 38 people (De Bruyn and Bell, 2001). A community of approximately 30 000 households was relocated to

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Dangerous development on dolomite: spatial

2017-4-12  The article considers the spatial distribution and settlement type characterisation based on spatial layout and dwelling types for various low-income settlements found on dolomite in Gauteng and surrounding areas (Gauteng City Region). Settlement types that were considered, based on aerial photography, cadastral information and field verification, include informal settlements, formal housing ...

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A REVIEW OF THE DOLOMITE AND LIMESTONE

readily available in all major cities in South Africa and the SADEC region. The South African lime industry differs in three ways from other industrialised countries: firstly, limestone deposits in North America and Europe are widespread and of good quality, whilst in South Africa, isolated high-grade deposits of

Get Price

South Africa operations, construction materials, crushed ...

2019-1-22  Atoll South Africa is a leading supplier of superior quality construction materials and solutions. We are an open cast mine located in Springs/Benoni, Gauteng South Africa producing crushed Dolomitic stone with a lifespan of 37 plus years to mine.

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Environmental geological aspects of the dolomites of

1993-1-1  Loss of life in sinkholes in the dolomite areas of South Africa INCIDENT DATE LIVES LOST SINKHOLE DIAMETER (m) West Driefontein 12-12-1962 29 >55m Blyvooruitzicht 03-08-1964 5 >55m Verwoerdburg 1970 3 5m Venterspost 24-10-1970 1 >5m Environmental geological aspects of the dolomites of South Africa Table 9..

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Legal aspects of development on dolomite land in South

Dolomite rock formations underlie large areas of the Gauteng, North, North-West and Mpumalanga Provinces in South Africa. Sinkholes, subsidences and dolines that may form at any place and at any time on these formations pose a threat to the properties and lives of thousands of people who live and work there. Since much urban, industrial and mining development has taken place in these areas ...

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SURFACE SUBSIDENCE AND SINKHOLES IN THE

2015-1-15  mines (a tenth mine was then in the shaft sinking stage) amounted to 7,610,000 ounces or 18.8 per cent of the published world production figure of 40,500,000 ounces. The total gold produced in the Republic of South Africa that year was 30,532,880 ounces, of which 23,45 per cent was mined in this comparatively small field.

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Construction on dolomite in south Africa SpringerLink

Damage to structures and loss of life have been more severe on dolomite than on any other geological formation in southern Africa. The subsidence that occurs on dolomitic terrain following development or during dewatering has given dolomite a notorious reputation and engineers and geologists became reluctant to recommend development on the material.This has led to the pioneering of founding ...

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Sinkholes - Council for Geoscience

2017-5-24  The ingress of water from leaking water-bearing services; Groundwater level drawdown. Approximately 25% of the Gauteng Province, as well as parts of Mpumulanga, Limpopo, North West and Northern Cape Provinces, are underlain by dolomite. Sinkholes have over the past 50 years been the direct cause of death of at least 39 people in South Africa.

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Guidelines for Sinkhole and Subsidence Rehabilitation ...

2016-5-12  South Africa, sinkholes induced by the dewatering of dolomite groundwater compartments for gold mining caused the loss of life of 38 people (De Bruyn and Bell, 2001). A community of approximately 30 000 households was relocated to safer ground in a dolomite area west of Johannesburg, South Africa

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(PDF) An overview of the geology of the Transvaal ...

In South Africa, the Malmani Subgroup has a sheet-like geometry (Eriksson and Altermann, 1998) and is divided into five formations (Fig. 2), mainly comprising stromatolitic dolomite with ...

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Rock Mechanics - an introduction for the practical engineer

2019-5-22  Rock mechanics research in South Africa was initiated some 15 years ago to provide an understanding of the rockburst hazard which occurs in many deep-level gold mines. The effects of a typical rockburst are illustrated in Figure 1. It has been defined1 as damage to underground workings caused by the uncontrolled disruption of rock associated with a

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Zimbiwa Dolomite, South Africa - miningweekly

2003-11-21  Zimbiwa Dolomite, South Africa. Name: Zimbiwa Dolomite. Location: Benoni, Gauteng. Brief history: Black economic empowerment mining company

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SURFACE SUBSIDENCE AND SINKHOLES IN THE

2015-1-15  mines (a tenth mine was then in the shaft sinking stage) amounted to 7,610,000 ounces or 18.8 per cent of the published world production figure of 40,500,000 ounces. The total gold produced in the Republic of South Africa that year was 30,532,880 ounces, of which 23,45 per cent was mined in this comparatively small field.

Get Price

South Africa operations, construction materials, crushed ...

2019-1-22  Atoll South Africa is a leading supplier of superior quality construction materials and solutions. We are an open cast mine located in Springs/Benoni, Gauteng South Africa producing crushed Dolomitic stone with a lifespan of 37 plus years to mine.

Get Price

Environmental geological aspects of the dolomites of

1993-1-1  Journal of African Earth Sciences, Vol. 16, No. 1/2, pp. 53-61, 1993. 0899-5362/93 $6.00+0.00 Printed in Great Britain 1993 Pergamon Press Ltd Environmental geological aspects of the dolomites of South Africa D. B. Btrrrvdcx, J. L. VAN Root* and R. LIGTHELM* Engineering Geological Environmental Services, Rivonia, Johannesburg, R. S. A. *Department of Geology, University of

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GC4W7DA Blyvooruitzicht Sinkholes (Earthcache) in

Dolomite rock is found over a wide area in the North-west and Gauteng provinces of South Africa as shown in the diagram below. It stretches from the far West rand to the far East rand, of the Witwatersrand, encircling the granite dome between the

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(PDF) An overview of the geology of the Transvaal ...

In South Africa, the Malmani Subgroup has a sheet-like geometry (Eriksson and Altermann, 1998) and is divided into five formations (Fig. 2), mainly comprising stromatolitic dolomite with ...

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The geology of an area south of Pretoria with specific ...

2014-12-10  Stratigraphy of South Africa (courtesy Council fro Geoscience) 7. Conceptual diagram of karst landscape (after Waltham and Fookes) 8. Surfer® plot of bedrock elevation in east-west direction with 30 % tilt 9. Surfer® plot of bedrock elevation at 40 degree orientation with 8 % tilt 10. Diagram depicting shallow dolomite incised by grykes 11.

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Home - Cape Lime for Building, Agriculture Manufacturing

2021-9-4  Lime Material. Lime is known as the "versatile chemical" and has been used in building and industry for ages. It is widely used in industry in a diversity of fields, from building, agriculture, paper making, steel manufacture, waste management, poultry farming, food storage and water treatment through to Limestone production.

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Rock Mechanics - an introduction for the practical engineer

2019-5-22  Rock mechanics research in South Africa was initiated some 15 years ago to provide an understanding of the rockburst hazard which occurs in many deep-level gold mines. The effects of a typical rockburst are illustrated in Figure 1. It has been defined1 as damage to underground workings caused by the uncontrolled disruption of rock associated with a

Get Price

3D edge detection seismic attributes used to map

2019-1-14  The deep gold mines of South Africa employ labor-intensive mining methods with as many as 5000 miners working in a single shaft. The miners face various hazards, including rock falls, rock-bursts associated with mining-induced seismic events, moving trains transporting ore and waste rock, handling of explosives, in-

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