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bord and pillar mining at impala

EVALUATION OF BORD AND PILLAR MINING SYSTEM …

EVALUATION OF BORD AND PILLAR MINING SYSTEM …

The major partial mining method are strip pillar mining, Wongawilli strip pillar mining, room and pillar mining, and thickness-limited extraction. 1. Strip pillar mining. Strip mining technology is an effective measure to reduce the overburden strata and surface movement and deformation, and it is also one of the important measures in the system of “Green Mining.”

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Bord and pillar applications on the platinum mine: T-cut ...

Bord and pillar applications on the platinum mine: T-cut ...

Nov 04, 2021 Mining takes place less than 200m below surface, utilising the bord-and-pillar mining method. Ore is processed at a concentrator located on site, at the rate of approximately 227,000 tonnes per month. Concentrates are trucked to South Africa for smelting and refining at …

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Bord-and-pillar mining explained Illawarra Mercury ...

Bord-and-pillar mining explained Illawarra Mercury ...

University (WVU), a study of the recovery of coal pillars through retreat room-and-pillar mining practices in underground coal mines at depths greater than 1,500 ft. The study should examine the safety implications of retreat room-and-pillar mining practices, with emphasis on the impact of full or partial pillar extraction mining.

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Optimization of Continuous Miner Operations in Bord …

Optimization of Continuous Miner Operations in Bord …

The Impala Platinum mining operation is located just to the north of Rustenburg on the western limb of the Bushveld Complex. The mine holds contiguous mining and ... Mechanised (trackless) bord and pillar mining occurs in selected Merensky . 3 Mining . time. 14# Impala 14 …

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Bord Pillar – Mining Science and Technology

Bord Pillar – Mining Science and Technology

Mining at Bathopele. Mining activity at Bathopele involves the Bord and Pillar mining layout in the low profile (LP) section, while breast mining layout is applied for the extra low profile (XLP) section. Mining is carried out depths ranging from 40m to 350m below the surface.

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Mechanised mining in the spotlight - Miningmx

Mechanised mining in the spotlight - Miningmx

during mining. At present pillar dimensions are either based on experience at neighboring mines or on strength equations that were developed for metal or non-metal mines. This paper presents a pillar design methodology that was developed from a study of pillar performance in operating stone mines. Data were

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(PDF) Success of Continuous Miner in Bord and Pillar …

(PDF) Success of Continuous Miner in Bord and Pillar …

Bord and pillar mining The following methods are commonly used in bord and pillar method for development and depillaring using continuous miner: Development 1. Bord and pillar method Depillaring 1. Split and Fender system 2. Nevid method of mining Continuous miner A continuous miner is a large steel drum equipped with a

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TYPE OF PILLARS – Mining Science and Technology

TYPE OF PILLARS – Mining Science and Technology

Jul 20, 2010 “In the context of the types of support design applied in bord and pillar mechanised mining (and other methods for that matter) “one size definitely does not fit all’.’ That’s a reference to the fact that the DMR apparently based its directive on steps taken by Implats to reduce bord widths to six metres last year after a rockfall at ...

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SA mine accident kills nine Impala ... - Mining Weekly

SA mine accident kills nine Impala ... - Mining Weekly

The mining layout is exactly the same as that of the normal bord and pillar layout (see Figure 3). The bords are 4 m wide and pillar sizes are 13 m x 13 m, thus creating centres of 17 m. The stopping width in the development phase is 1.8 m (0.2 m hanging wall, 0.8 m UG2 reef and 0.8 m footwall). The pillar that is created is then stoped out ...

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Bathopele Mine Rustenburg South Africa - Mining ...

Bathopele Mine Rustenburg South Africa - Mining ...

Figure 22. Results of numerical model showing the average pillar stress during bench mining as a ratio of the average pillar stress prior to bench mining. .....30 Figure 23. Change in the average vertical pillar stress and pillar strength during various stages of bench mining, for a pillar with a width-to-height ratio of 1.5 based on the results of

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Room and Pillar Mining - an overview ScienceDirect Topics

Room and Pillar Mining - an overview ScienceDirect Topics

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 …

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Mineral resource and mineral reserve statement 2014 Impala

Mineral resource and mineral reserve statement 2014 Impala

ARM House 29 Impala Road Chislehurston Sandton South Africa 2196 ... +27-11-779-1312. ... Bord-and-pillar; Summary: Mining operations comprise open-pit mining operation which feeds two concentrators (MMZ and PCMZ) producing concentrate containing PGMs, nickel, copper and cobalt. ...

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ANGLO AMERICAN PLATINUM CORPORATION LIMITED …

ANGLO AMERICAN PLATINUM CORPORATION LIMITED …

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 the stability of pillars

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Room and Pillar Mining Method - SlideShare

Room and Pillar Mining Method - SlideShare

Jul 16, 2010 Shepherd pointed out Implats lost about 20% of its production from bord and pillar mechanised stopes following the reduction in panel width. He said Aquarius Platinum appeared to be the company which was the most exposed to such changes, because it derived at least 85% of its South African production from mechanised bord and pillar mining.

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Shaft Sinkers wins more Leeuwkop ... - International Mining

Shaft Sinkers wins more Leeuwkop ... - International Mining

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). A special orientation of transit and stops galleries creates areas with horizontal floor, allowing the use of equipment on tires.

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EVALUATION OF PILLAR DESIGN SYSTEMS FOR LOW …

EVALUATION OF PILLAR DESIGN SYSTEMS FOR LOW …

p = pillar width (m) B = bord (heading) width (m) For critical and super critical mining subsidence situations, the goaf load trinagle will reach the surface boundary, for this situation the load on the pillar equation becomes, for w/h = 2 tan f. The respective average pillar stress for these two conditions are given by: for w/h 2 tan f

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Mimosa Sibanye-Stillwater

Mimosa Sibanye-Stillwater

Jul 21, 2009 The Department of Mineral Resources said that all mechanised operations using the bord-and-pillar mining system at Implats had been stopped until an investigation could be concluded.

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VENTILATION PLANNING LAYOUTS FOR LARGE …

VENTILATION PLANNING LAYOUTS FOR LARGE …

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 Shaft Phase 1

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Major Mines Projects - Mining Intelligence and News

Major Mines Projects - Mining Intelligence and News

Oct 22, 2014 Room (Bord)-and-Pillar Layout Figure shows Room and Pillar Mining 6. Underground mining: room-and-pillar mining of thick seams –“Benching” Different approaches allow either the top or bottom part of the seam to be mined out first. Note: the “hangingwall” is above the mining cavity, and the “footwall” is below it.

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THE BUSINESS OF MINING

THE BUSINESS OF MINING

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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Design of Merensky Reef crush pillars T n s a c t

Design of Merensky Reef crush pillars T n s a c t

Impala Platinum and Lonmin market shares converge around 22% Table III Principle PGE mining methods as of 2010 (Data source: company websites and expert opinion discussions) Mining method Total underground West East Surface Open-pit operation 20 Mechanized – bord and pillar using ultra low profile machinery 24% 3 4

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Board Pillar - SlideShare

Board Pillar - SlideShare

Current mining consists of 5.5m to 7m bord sizes with 8m by 4m for the whole mine. The bord sizes are 7m, 6.5m and 5.5m in GCD class C, D and E respectively. The strike pillars in panels are elongate on strike so that the longest dimension of the pillar intersects the …

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An investigation of factors contributing to low face time ...

An investigation of factors contributing to low face time ...

shows a linear relationship between pillar size and peak strength. [1] where: he accounts for the influence of a gully cut adjacent to one side of the pillar. This influence was determined by Roberts et al.7: [2] w and h are the pillar width and mining height, respectively, and L refers to the pillar length. Merensky pillar behaviour, including ...

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SERVICES – Triple M Mining

SERVICES – Triple M Mining

Dec 26, 2013 Mining operations will initially begin at around 1,100 m below surface and extend to a depth of about 1,500 m. Other major infrastructural developments to be undertaken include the construction of a concentrator facility with a capacity of 250,000 t/month and a tailings dam. ... the most likely mining method will be mechanised bord-and-pillar ...

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DMR backs down on Aquarius - Miningmx

DMR backs down on Aquarius - Miningmx

2. Bord and Pillar –mechanised layout 3. Open cast –surface excavation represented by highwalls and benches – mechanised layout Block Design: 1. Vertical Shaft Systems 2. Decline Shaft Systems. 3. Open Cast Salient Features: 1. Conventional mining can be done any reef dip 2. Mechanised mining typically never gets done when the reef dips ...

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Toward Pillar Design to Prevent Collapse of Room-and ...

Toward Pillar Design to Prevent Collapse of Room-and ...

Type of operation 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 ...

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Fact sheet 20 - Royal Bafokeng Nation

Fact sheet 20 - Royal Bafokeng Nation

Triple “M” Mining is also proud of our expertise in Trackless and Mechanized Mining method s as well as fleet sourcing and maintenance disciplines.Operational experience in Trackless Development and Board and Pillar Reef extraction is our forte.We proudly manage and maintain our fleet of machinery and place focus on down time elimination by ...

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Rustenburg Sibanye-Stillwater

Rustenburg Sibanye-Stillwater

Room-and-pillar mining accounts for a significant portion of the total mineral production in the United States As shown in table 1, well in excess of $6 billion worth of mineral commodities are produced each year by this method. A substantial portion ($3.55 billion) of coal production still comes from room-and-pillar mining. Metallic minerals

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