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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 s was relocated to safer ground in a dolomite area west of …

Underground Mining Methods

2009-12-7 · characteristics of the major mining methods. 1.3.2 Room-and-Pillar Mining Room-and-pillar mining is designed for flat-bedded deposits of limited thickness, such as copper shale, coal, salt and potash, limestone, and dolomite. This method is used to recover resources in open stopes. The method leaves pillars to support the

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.

(PDF) Construction on dolomite in south Africa

Sinkholes can occur on land underlain by dolomite and cause substantial damage to buildings and even loss of life. More than four million people work or reside on …

Dolomite Mining Methods

dolomite mining process in south africa - dolomite mining ... Products: Dolomite (metallurgical and aggregate), stone-dust and agricultural lime. Mining method: Opencast ...

Underground mining at Ekati and Diavik diamond mines

Mines. A relatively large number of underground mining methods were tested, implemented, and evolved mainly in South African mines. In the mid-1990s, Alrosa also started the development of the first ... Underground mining of diamond deposits was introduced in South Africa in the 1890s, and for a century, South Africa was the only country with ...

Water management at a large opencast strip coal mine in ...

(PDF) Construction on dolomite in south Africa

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Welcome at H. Pistorius & Kie. H Pistorius & Co is the oldest supplier of the best quality agricultural lime in South Africa. We supply agricultural lime (also known as aglime) across South Africa since 1944. H Pistorius & Co are also directly involved with agricultural lime regulations. READ MORE.

Contact Us

Our head office in Pretoria, South Africa, is the administrative hub of all our company activities. If you have any queries about a deliveries or would like to enquire about anything else related to underground mining, please call our Head Office (see details below).

Dolomite and dolomitization model

2018-7-13 · Dolomite types On the basis of the mode of formation, dolomites can broadly be divided into two groups: primary dolomite and secondary dolomite.2 Primary dolomite precipitate directly from aqueous solution, mostly at or near room temperature (20-35oC), with no CaCO 3 dissolution involved.3 However, dolomite can also form as a secondary phase

Geotechnical Engineering

Jones & Wagener has a dedicated team of highly qualified geotechnical practitioners with access to more than 50 years of experience across South and Southern Africa.. Our engineers and engineering geologists work closely together to develop cost effective, innovative, relevant and ''constructible'' solutions for our clients and as a service to other divisions in Jones & Wagener.

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 ...

The application of geophysics to gold exploration in …

2018-10-11 · Republic of South Africa, showing the extent of the Witwatersrand Basin and the location of the main gold-mining areas. 1. Central Witwatersrand or Central Rand. 2. West Rand. 3. East Rand and East Rand Basin. 4. Klerksdorp Goldfield. 5a, 5b and 5c West Wits Line. 6. Free State Goldfield. 7. Evander Goldfield on the Kinross Basin.

How to achieve better extraction and safer mining methods

2019-8-21 · South Africa''s mining industry is a shadow of its former self, having contributed 21% to South Africa''s GDP during the 1980s, while in 2018, contributed a mere 7.3% towards GDP. The cost of unlocking the country''s significant gold reserves …

Diamond Mining Methods | Diamond Museum Cape Town

The first diamonds discovered in South Africa were from alluvial deposits. Today, industrial alluvial mining involves building a large wall to collect the water in one area. Diamonds are often found in the gravel layer, which collects under layers of other material, such as mud, clay and underwater plant-life.

Zimbiwa Dolomite, South Africa

2003-11-21 · Zimbiwa Dolomite, South Africa. ... Mining method: Opencast. Reserves: 5-million tons. ... Run-of-mine dolomite is delivered to a 450 t/h primary crushing plant with primary stockpile capacity of ...

Sinkholes and subsidence in South Africa

2020-5-26 · 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 …

Major Mines & Projects | Amandelbult Operation

At Dishaba Mine, short-life, low tonnage outcrop strip mining supplements underground production. The Tumela Mine is situated in the province of Limpopo in South Africa, between the towns of Northam and Thabazimbi, within the North-western Limb of the Bushveld Complex. The mine operates under a mining right covering a total area of 110 km2.

All that glitters... Acid mine drainage: The toxic legacy ...

2021-4-17 · In 1947, in a dolomite cave 50 kilometers northwest of Johannesburg, South Africa, anthropologist Robert Broom discovered a 2.05-millionyear- old adult australopithecine skull, one of the oldest and most important hominid fossils ever found.

CHARACTERISATION OF THE DEEP AQUIFERS OF SOUTH …

2021-9-1 · 2.1.9 Case Studies from South Africa 17 2.1.9.1 Surface and Groundwater Interaction in Johannesburg 17 2.1.9.2 Dolomite Karst Aquifers of the West Rand 19 2.1.9.3 Groundwater in the Bushveld Complex 20 2.1.10 Protection of Deep Groundwater 22 2.1.10.1 Impacts of Mining on Physical Geohydrology 22

Shaft sinking from 1940 to 1970: The golden age

2020-4-8 · In South Africa in 1949, a clamshell grab was successfully used for sinking a shaft at the Western Holdings mine. In 1952, the No. 2 shaft at the Vlakfontein mine was also successfully sunk using a one-ton capacity, pneumatically operated cactus grab. In Europe, the development of a pneumatically operated grab for shaft mucking was also being ...

A Guideline for the Assessment, Planning and …

2007-5-29 · Watermeyer RB, 2001. Proposed method for dolomite land hazard and risk assessment in South Africa. Journal of The South African Institution of Civil Engineers, 43(2). The joint Structural Division established the following minimum requirements and mandatory precautionary measures for areas designated as being D2 and D3.

Mining Laser Systems

2014-2-23 · Foton Optoelectronics South Africa. FOTON Miner''s Laser Kit, comprising FOTON Slope Laser and FOTON Pin Laser, is a multi-purpose product, designed specifically for use by mine surveyors and miners during various stages of mine development and production.Grade and direction lines can be marked and extended within minutes with FOTON Slope Laser, using pre-installed survey marks.

TECHNICAL PAPER Sinkhole and subsidence inStitution …

2018-8-13 · dolomite bedrock in the Gauteng Province, South Africa.Although dolomite land is found across several South African provinces, sinkhole and subsidence formation in Gauteng, the economic hub of South Africa, has been considerably more severe than in other provinces. Thousands of sinkhole and subsidence events have occurred in the past 50 years.

Rehabilitation of sinkholes and subsidences on Dolomitic ...

In South Africa most sinkholes and subsidences have been recorded on dolomite of the Malmani Subgroup of the Chuniespoort Group on the Far West Rand and in an area south of Pretoria within the City of Tshwane, with numerous studies done on the occurrence of …

DEPARTMENT OF PUBLIC WORKS

2018-12-9 · 2.5 Distribution of Dolomite in South Africa Dolomite land occupies up to 25 percent of Gauteng and underlies some of the most densely populated areas such as Bekkersdal, Katorus, Centurion, Dobsonville, Deapmeadow etc. The distribution of dolomitic land in South Africa is shown on the attached Figure 1. 3.

impact of mining activities in South Africa S. Chevrel ...

2014-5-14 · industrialised Gauteng, the most populous province of South Africa. Since the onset of mining, and especially since the early 1960s, some of the dolomitic compartments have been dewatered, to allow mining to proceed safely below the dolomite (Jordaan et a/., 1960) In areas where karst and

Construction on dolomite in south Africa

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.

Document number SANS 1936-2

2012-1-30 · Avoiding the hazard associated with dolomite land by prohibiting development of any kind on such land is not practical as between four and five million South Africans currently reside or work on such land. Twenty-five per cent of Gauteng, the commercial, mining and manufacturing centre of South Africa, is located on dolomite land.

HDPE Structured Wall Sewer / Stormwater Pipe & …

2020-8-18 · Dolomite Land in South Africa 6 SINVACLITE™HDPE Structured Wall Pipe Northern Cape, Limpopo, Mpumalanga, North West and approximately 25% of Gauteng is underlain by Dolomite rock that become water soluble over time. HDPE Pipes, Fittings and Manholes are the recommended materials to be used in these areas.

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 …

Platreef Project | Ivanhoe Mines Ltd.

2021-11-22 · Ivanhoe Mines indirectly owns 64% of the Platreef Project through its subsidiary, Ivanplats, and is directing all mine development work. The South African beneficiaries of the approved broad-based, black economic empowerment structure …

Evaluation of Zefreh Dolomite (Central Iran) for ...

2012-5-23 · The Zefreh dolomite mine is located 80km northeast of the city of Isfahan in Central Iran. The annual dolomite production is 100 kt=y from the Permian and Triassic dolomitic units. In this study, samples were collected during two field sea-sons. The petrography of 60 samples, for dolomite and calcite, was carried out using

South Africa''s most commonly mined minerals

2016-9-6 · South Africa''s mining reserves are estimated to be worth approximately R20 trillion. Let us look at which minerals are bringing in the most money in South Africa. Coal. Coal is an important resource because it fuels industrialisation. Coal is used to generate electricity, and is used in the production of steel and manufacturing of cement.