MJ Series Jaw Crusher

MJ series jaw crusher is mainly used as a coarse crushing crusher. Its purpose is to crush rocks into smaller particle sizes for subsequent processing in the crushing section. Because it can effectively…

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MJ Series Jaw Crusher

MC Series Single-Cylinder Hydraulic Cone Crusher

MC series single cylinder hydraulic cone crusher is used in secondary and fine crushing operations. It is widely used in metallurgy, construction, highway, chemical and building materials industries. It…

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MC Series Single-Cylinder Hydraulic Cone Crusher

ML Series Vertical Shaft Impact Crusher

Vertical shaft impact crusher is often used in the final crushing circuit. Due to the ability to produce fine-grained final products, ML series vertical shaft impact crushing equipment is very popular…

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ML Series Vertical Shaft Impact Crusher

MD Series Multi-Cylinder Hydraulic Cone Crusher

MD series multi-cylinder hydraulic cone crusher is used in the second and third stages of mineral processing and stone crushing, as well as the superfine material crushing of some rocks and ores. MD series…

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MD Series Multi-Cylinder Hydraulic Cone Crusher

MF Series Fixed Shaft Circular Vibrating Screen

In order to eliminate the phenomenon of unbalanced vibration, unstable amplitude, on/off bounce, poor screening effect, and cracking of the screen box caused by diagonal vibration in the actual screening…

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MF Series Fixed Shaft Circular Vibrating Screen

MGD Series Vibrating Feeder

MGD series vibrating feeder is designed for ultra-heavy working conditions and is suitable for feeding materials to primary jaw crushers, primary impact crushers and primary hammer crushers. It is widely…

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MGD Series Vibrating Feeder

MGB series hopper discharge feeder

MGB series hopper discharge feeder is mainly used for the uniform, quantitative and automatic control of under-silo feeding of bulk materials.…

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MGB series hopper discharge feeder

MZA/K Series Circular Vibrating Screen

MZA/K series circular vibrating screen produced by Meilan has an axis-eccentric circular vibrating screen, which can be used for dry and wet classification of materials in coal preparation, mineral processing,…

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MZA/K Series Circular Vibrating Screen

Defining a representative overall equipment effectiveness ...

Mining is carried out through a bord and pillar method. The mine is partially mechanised with hand-held drilling and bolting used for mining. The recovered ore is hauled by truck to the concentrator plant for processing. Ore processing. The concentrator plant at Marikana has a processing capacity of 220,000t of ore each month.

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Definition of bord

Hartman, W. (2000) The application of the Q tunnelling quality index to rock mass assessment at Impala Platinum Mine. Proceedings SANIRE 2000 Symposium. Joughin, W.C., Swart, A.H. and Wesseloo, J. (2000) Risk based chromitite pillar design – non-linear modelling, Proceedings SANIRE 2000 Symposium.

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Major Mines & Projects | Impala Mine

Jul 29, 2016· Please watch: "Mines Act 1952 | Video No 1| Committee | With MCQ | In HINDI |" https:// -~-~~-~~~-~~-~- Bord and pillar is...

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Bord & Pillar Pet Resort

• Have strong knowledge on underground narrow reef and bord and pillar mining methods in a hard rock mining environment. • Advice on mining layouts (Conventional & TMM) in consultation with the mine engineering, mine planning, rock engineering (geotechnical), ventilation, geology and surveying departments.

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Bord & Pillar Method | Mining | Coal

The success of Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too large, then the extraction ratio decrease leading to less production and profitability and if the pillars are too small it becomes venerable to human safety. The issues relating to …

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Mimosa Platinum Mine, Great Dyke region, Zimbabwe

different bord-and-pillar layouts were designed. These layouts were then evaluated according to dilution, produc-tivity, cost implications, profit and mining flexibility and the most suitable layout was chosen. Bord-and-pillar mining was then compared to conven-tional mining according to the following: financial analysis, dilution and flexibility.

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AngloGold, Aquarius and Impala: South African Equity ...

Room and pillar (variant of breast stoping), is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, "rooms" of ore are dug out while "pillars" of untouched material are left to support the roof overburden.Calculating the size, shape, and position of pillars is a complicated procedure, and …

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v117n2a8 Reflections on narrow

Room and pillar is an underground mining method that has applications to a wide variety of hard-rock deposits worldwide. It is commonly classified as an open-stoping method, meaning that development involves mining out underground cavities while leaving the surrounding un-mined waste or ore as primary support.

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DESIGN OF SUPPORT SYSTEM FOR BORD AND PILLAR …

Merensky pillar strength formulae based on back-analysis of pillar failures at Impala Platinum.pdf ... mining by the bord and pillar method depends heavily on a comprehensive and dependable pillar ...

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LV 08

Conventional and hybrid mining with access via twin decline shafts (depth of less than 500m: Mechanised bord and pillar mining, accessed via a vertical Main shaft (753m) and a vertical Services shaft (723m) Resource: 82.8Mt: 262.4Mt (including Styldrift II) Construction: Commenced in 1997 with steady state reached in 2001: Commenced in 2009.

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Bord and pillar mining – Coal and coal mining – Te Ara ...

Although the use of mechanised bord-and-pillar type mining with pillar support is common in the shallow (<500m below surface) bushveld chrome mines, the platinum mines have traditionally employed narrow-width scraper mining as their stoping method, using …

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Projects

Bord-and-pillar definition is - of or relating to a system of coal mining in which tunnels are driven in a checkerboard pattern having massive square pillars between them which are gradually cut away as the work proceeds.

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Bord and Pillar mining by continuous Miner in HINDI

Mar 10, 2020· Breast mining; Bord-and-pillar; Summary: The Merensky and UG2 Reefs are mined concurrently at Impala. Stoping at the operations is carried out through conventional double-sided breast mining in accordance with Impala's best practice principles. The access haulages are developed in opposite directions from cross-cuts connected to a central ...

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Mechanised mining at 12 shaft

The success of a bord and pillar mining method in the exploitation of platinum heavily depends on a comprehensive and competent pillar design method. Pillars need to be large enough to contain load and to be small enough to avoid loss of resource. An optimum pillar design method achieves such a scenario.

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Royal Bafokeng Platinum | Condensed Consolidated Interim ...

Aug 20, 2009· Our client, as you know, is Aquarius Platinum and we now have a relationship with them extending over a number of years." Widlake adds that the mechanised bord-and-pillar mining at Marikana/Kroondal represents the ideal for Murray & Roberts Cementation; "Our focus is mechanised and hybrid systems," he says.

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Room and pillar mining

May 31, 2017· Bord-and-pillar extraction is the older of the methods, and  The word "bord" is not a misspelling of "board", but a mining term for an underground space or room created ...

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Schalk Engelbrecht

Applicability of bord and pillar mining method Following points should be considered for b/p mining Gradient of the seam: Flat seams are more suitable. Thickness of the seam: Seam thicker than 1.5 m and preferably 1.8-3 m thick are suitable for b/p mining method. Presence of stone and dirt bands: Seam should be free from stone and dirt bands.

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Two Rivers Platinum Mine: the orebody, the mining …

Mining is carried out through a bord and pillar method. The mine is partially mechanised with hand-held drilling and bolting used for mining. The recovered ore is hauled by truck to the concentrator plant for processing. Ore processing. The concentrator plant at Marikana has a processing capacity of 220,000t of ore each month.

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Invetsor visit(impala)

Jul 19, 2010· The directive will have a "detrimental economic effect" on mines that use the bord and pillar mining method, it said. Aquarius fell 1.22 rand, or 3.5 percent, to 34 rand. ... Impala …

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ANGLO AMERICAN PLATINUM CORPORATION LIMITED …

African Rainbow Minerals and Impala Platinum, respectively. TRP is situated on the farm Dwarsrivier 372KT, in the southern sector of ... The mining method is a mechanized bord and pillar layout, which will yield a total of 185 000 tons at full run of mine production from the underground UG2 mine.

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Bord

BR 425 - Design Bord and Pillar mining using Mine2-4D schedule done in EPS and reporting. Blackrock 1 year plan - Design Bord and Pillar mining using Mine2-4D schedule done in EPS and reporting. ... TWP (Impala 17 # Project) 2011 - 2012 1 year. Melrose Arch Impala 17 Shaft – Platinum mining operation situated in Rustenburg main ...

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Bord

Sep 15, 2015· Board & Pillar 1. Step mining It is an adaptation for the case where the dip of the ore body is too big (15o to 30o) to use equipment on tires at the same time that its thickness is relatively small (2 - 5 m).

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impala Fact sheet

IMPALA WESTERN AND EASTERN PLATS BARPLATS CROCODILE RIVER BAFOKENG Bushveld Complex Anglo Platinum Mines Implats Mines Lonmin Mines Northam Mine 2 5 O 25 O Republic ... • UG2 mining layout changed from Bord and Pillar to Hybrid • Reduced UG2 production to 40 ktpm because of increase in Merensky production. Planned New Frank Vent …

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EVALUATION OF PILLAR DESIGN SYSTEMS FOR LOW REEF …

of the hilly nature of the topography, depth from surface may be up to 1000m. Trackless Bord and Pillar type mining methods are utilised at shallow to intermediate depths where a sufficiently wide mining cut is indicated. A mining section consists of 8-12 metre bords, with pillar sizes increasing with depth below surface.

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