narrow reef mining production figures

  • narrow reef mining production figures

    A narrow reef mining machine the ARM 1100 as a mining production tool. Background Voest Alpine Bergtechnik is an Austrian Company based in Examples are in Figures 2 and 3. However, discussion has identified two high-risk elements, either of which could cause failure of the get price

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  • Mining by rock cutting in narrow reefs

    the narrow reef mining processes. A number of mechanized mining methods were being evaluated, together with one non-explosive based mining system. Voest Alpine had already applied the Icutroc cutting process in the Stillwater Palladium Mine in Montana, with mixed results. However, the UG2 was regarded as an easier target and it was decided

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  • Narrow Reef Mechanized Mining Simulation in Simio

    3/13/2015· Video illustrating the breast mining process in a narrow reef using unmanned Ultra Low Profile (ULP) Electrical equipment. The model can determine the sectio...

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  • Non-explosive rock breaking: Mining all of the reef, all

    1/21/2020· South Africa’s reef deposits, especially gold and platinum-bearing ore bodies, are narrow and tabular. While legislation dictates a minimum operation height of 800 mm in areas where people work, some of the country’s narrow reef mines have ore bodies with thicknesses of less than 500 mm, which results in ore dilution, as waste ore with zero economic value is also mined.

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  • (PDF) Loading and hauling of broken rock in a narrow

    in the narrow reef environment. South Africa gold and platinum mining remains predominately trackbound hauling with handheld pneumatic rock drills and scraper winches utilized in the

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  • The optimization of mining method and equipment

    the South African narrow reef mining industry has battled to control working costs in a labour-intensive industry. It is only through the application of appropriate technology that change will occur. It is the stoping method that is at the heart of the mining system. Introduce a different technology that results in a more efficient stoping system and the

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  • Electric narrow reef XLP mining coming to Anglo Platinum’s

    These new narrow reef machines use lithium-ion batteries which can achieve up to 2,000 charging cycles. These units will replace the diesel XLP units in the future. IM understands that Tumela will initially use the existing diesel refurbished XLP fleet for the first phase of the 15E work. The current XLP fleet is Epiroc equipment that is diesel-powered and the intention is to progressively phase the units out with electric DOK-ING Narrow Reef

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  • TWENTY FIVE YEARS OF MECHANISATION OF TABULAR

    5.2 Double Cut Mining: Waste Cut Blasted with Reef in Hangingwall 162 5.2A Double Cut Mining: LHD Below Reef in Hangingwall 163 5.3 Dilution Control in Access Stope Drives 164

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  • Evaluating the Viability of Pumpable Emulsion Explosives

    Evaluating the Viability of Pumpable Emulsion Explosives for use in Narrow Reef Mining Operations A research report on a study presented to The Department of Mining Engineering Faculty of Engineering and the Built Environment In partial fulfilment of the requirements for the completion of an MSc(ENG) By SELWYN PEARTON November, 2014

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  • Techno-economic optimization of level T and raise spacing

    (Figures 3 and 4). Conventional mining is, and has been, used widely in the extraction of shallow-dipping, narrow tabular reefs in the gold, platinum, and chromitite sectors in the South African mining industry (York, 1999; Ryder and Jager, 2002; Egerton, 2004). In the platinum mining sector, this fact is supported by Figures 3 and 4, which indicate that conven-

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  • Major Mines & Projects Mining Intelligence and News

    Open pit mining has continued at both Main Dome and West Dome open pits (including stockpile reclaim). Since 31 December 2019, the Mineral Resources and Ore Reserves were depleted by 0.2 million ounces of gold and 0.01 million tonnes of copper. Mining of Ore Reserves in the Main Dome open pit was completed in the fourth quarter of FY20.

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  • Modern Mining Underground Anglo American

    2. MM 220 Reef Miners. Also in development with SANDVIK is another remotely operated rig, the MN 220 Reef Miner. This incorporates cutting and roof bolting and is designed for mining narrow mineral reefs in hard rock. It is up to three times faster than conventional drill & blast methods and, of course, also removes our people from harm’s way.

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  • Underground mining (hard rock) Wikipedia

    The mining method selected is determined by the size, shape, orientation and type of orebody to be mined. The orebody can be narrow vein such as a gold mine in the Witwatersrand, the orebody can be massive similar to the Olympic Dam mine, South Australia, or Cadia-Ridgeway Mine, New South Wales.The width or size of the orebody is determined by the grade as well as the distribution of the ore.

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  • (PDF) A progress report on ultra-high-pressure waterjet

    Once the efficient use of waterjets in stopes has been implemented on a routine basis and at an industrial scale, a new era of narrow-reef mining can begin.Figure 1b -Figure 2 -1b2'Pro cutting' head by KMT Ltd. (for permanent working pressure of 3.5 kbar and max. 6.2 kbar pressure (KTM, 2007), and outline and crosssection of a typical waterjet nozzle (WARDjet) Ferrosilicon spheres (left) abrasives at scale 1:1

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  • Strategic implication of a segmentation and positioning

    almost 500 tons of gold annually, about 40 % of annual world production. The gold is mined from deep narrow reefs, extending spatially over large areas and dipping between 10° and 30°. The rock sufrounding the gold bearing reefs is typically hard but strong allowing mining at great depths. However, the high quartz content of the rock

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  • A linear programming and stochastic analysis of mining

    required to meet a planned production target can be determined from the set production rate. A typical shaft produces about 100,000tpm run of mine (ROM) ore which equates to about 25,000m2/month of reef area at an ore density of about 4t/m3, typical of UG2 reefs. This production requirement equates to about 14 stopes that must be blasted daily.

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  • THE DESIGN AND BEHAVIOUR OF CRUSH PILLARS ON THE MERENSKY REEF

    A typical mining configuration for an in-stope pillar layout in a hard rock narrow tabular mine (stoping width = 0.9 2 m) is shown in Figure 1.2. The pillars are separated in the direction of mining by a holing, 2 4 m wide. Inter-pillar spans vary between 20 35 m. An off-reef haulage links to the reef horizon via a

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  • Mining Underground mining Britannica

    Mining Mining Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on the

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  • Lecture 4: Underground Mining SlideShare

    11/2/2011· Blast mining An older practice of coal mining that uses explosives such as dynamite to break up the coal seam, after which the coal is gathered and loaded onto shuttle cars or conveyors for removal to a central loading area. This process consists of a series of operations that begins with "cutting" the coal bed so it will break easily when blasted with explosives. This type of mining accounts for less than 5% of total underground production

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  • AN ANALYSIS OF THE ASSOCIATION BETWEEN ERGONOMIC RISK

    illnesses in narrow reef mining at Goldfields of Mazowe (GFM).The analytical research design was employed and cross verification was done through combining several methods thus triangulation were both qualitative and quantitative research approaches were used. Data was

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