##tihuan2##The focus shifted from opencast and shallow pit mining methods to underground mining as new techniques had to be developed to access the rich gold deposits that extended far underground. ... Brackley, I.J., Connelly, R.J., Campbell, G., 1987. The dewatering of dolomite by deep mining in the West Rand, South Africa. In: …
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##tihuan2##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.
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##tihuan2##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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##tihuan2##South Africa Tel/Fax: +27 (0)11 976 3497 Cell: +27 (0) 82 871 6657 ... No Present or past mining activities influence the site. ... Soil profiling and rotary percussion borehole logging on dolomite land in Southern Africa for engineering purposes. • SANS 1936-1:2012, Development of dolomite land – Part 1: General principles and ...
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##tihuan2##The technique has been used broadly for monitoring slow or relatively slow movements caused by human-related factors, such as mining Remote Sens. 2020, 12, 3976 4 of 57 activities [10,11 ...
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##tihuan2##ground stabilization in dolomite areas near Carletonville, South Africa C.J.U. Swart 7 A. van Schalkwyk Received: 22 May 2000 7 Accepted: 18 July 2000 C.J.U. Swart Gold Fields Limited Ground Stability Group, P.O. Box 6171, Oberholzer 2502, South Africa A. van Schalkwyk (Y) Department of Earth Sciences, University of Pretoria, Pretoria 0002 ...
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##tihuan2##In South Africa, "dolomite land" denotes areas that are underlain directly or at shallow depths (less than 100 m) by dolomite of the Chuniespoort Group of the Transvaal Supergroup (2300–2200 Ma). Twenty percent of the densely populated Pretoria-Witwatersrand-Vereeniging area of the Gauteng Province is underlain by dolomite
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##tihuan2##Several supergene ferromanganese wad deposits, mined on small scale for industrial applications, are developed on dolomite of the Neoarchaean Malmani Subgroup of the Transvaal Supergroup in South ...
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##tihuan2##Karst-related sinkholes and subsidences occur on areas underlain by Chuniespoort Group dolomite bedrock in the Gauteng Province, South Africa. Although dolomite land is found across several South ...
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##tihuan2##Dolomite Market Size & Share Analysis - Growth Trends & Forecasts (2024 - 2029) The Dolomite Market Report is segmented by mineral type (agglomerated, calcined, and sintered), end-user industry (agriculture, …
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##tihuan2##South Africa has a growing population, a relatively dry climate, and abundant mining activity, all of which increase the impor - tance of water management. The Mooiplaas Dolomite Quarry, south east of Pretoria, has been mining metallurgical grade dolomite since 1969, within the productive karst aquifers of the Malmani Subgroup, Transvaal ...
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##tihuan2##South Africa is the home of major global mining operations, and the acid mine drainage (AMD) contribution has been attributed to abandoned mine sites and huge pyrite-bearing tailings from coal and ...
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##tihuan2##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 …
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##tihuan2##Hartebeestfontein Gold Mining Company Limited, which produces 100 kg of gold per working day, has a mining lease area situated mainly over dolomite. A major river nearby governs the regional drainage.
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##tihuan2##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 Johannesburg, South Africa, at a cost
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##tihuan2##The Department of Water Affairs (DWA) have published a guide for managing groundwa-ter in dolomitic areas. The guide is called "A Guideline for the Assessment, Planning and …
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##tihuan2##In the Far West Rand of South Africa, catastrophic sinkholes induced by dewatering of dolomite aquifers for gold mining have caused a total of 38 fatalities (Buttrick et al., 2001; De Bruyn and ...
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##tihuan2##Centurion is a fast developing area facing severe karstic sinkhole development. The area is predominantly underlain by fractured dolomite formations that include Oaktree, Monte Christo, Lyttelton, and Eccles of the Malmani Dolomite Group (~ 2600 and ~ 2500 Ma). Fractures of the underlying dolomite formations were …
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##tihuan2##General The following maps and documents may be freely downloaded and used by the public: Simplified Geological Map of South Africa (±A0 size) Mineral Maps Simplified Geological Map of South Africa (±A0 size) Bushveld Complex, South Africa - Simplified Geology and Selected Platinum, Chromite and Vanadium Deposits (±A4 size) Coal…
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##tihuan2##901494 Dewatering of dolomite by deep mining in the West Rand, South Africa Warwick, D W; Brackley, I J A; Connelly, R J; Campbell, G Proc 2nd Maltidisciplinary Conference on Sinkholes and the Environmental Impacts of Karat, Orlando, 9-11 February 1987 P349-358.
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##tihuan2##The dolomite aquifer is the largest water source in northern South Africa. The flow dynamics of the dolomite aquifer is investigated by using analyses of the hydro-chemical parameters and isotopes (3H, δ2H, δ18O, δ13C-DIC and 14C-DIC) of spring samples. Recharge areas of the dolomite aquifer are confirmed through interpretation …
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##tihuan2##Browse 54 dolomite mining USGS records worldwide. Most records highlight dolomite mining opportunities and activity in North America, Africa, and South America.
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##tihuan2##The high-resolution seismic reflection method was conducted at an abandoned coal mine site located in the Benoni area, near the city of Johannesburg, South Africa, with the aim of investigating the subsidence- and sinkhole-related features that are commonly observed in the area. Like many old abandoned coal mine sites, the study …
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##tihuan2##When it is dominated by dolomite (the mineral), it is called dolomite (the rock). Limestone is thus a chemical or biochemical sediment consisting essentially of calcium carbonate …
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##tihuan2##Dolomite risk zonation: demarcate low, medium and high risk areas with specific development notes of each, other geotechnical problematic areas with specific …
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##tihuan2##The Vaal River Basin is an economically significant area situated in the interior of South Africa (SA), where mining, industrial, domestic and agricultural activities are very intense. The purpose of the study was to assess the influence of geology and anthropogenic activities on groundwater chemistry, and identify the predominant …
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##tihuan2##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.
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##tihuan2##Analytical and numerical study of dolomite sinkholes in Centurion South Africa . × ... and to interrogate the current method of dolomite stability analysis. The study area is located partly on the Lyttelton and Eccles Formations, Malmani Subgroup, Chuniespoort Group, of the Transvaal Supergroup. ... Changes in stress around mining excavations ...
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##tihuan2##Example of how CGS uses the national dolomite databank (ENGEODE) to promote sustainable infrastructure planning and development in South Africa, particularly on …
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