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 from the roadways for 2 m. The stopping width is only 1 m (0.2 m
Bord And Pillar Mining Use Mechanised. Bord and pillar method schemes of development design of bord and pillar working statutory provisions selection of equipment for development -mechanised loaders, continuous miners etc.Preparatory arrangement for depillaring statutory provision for depillaringdesigning the system of pillar extraction with caving and stowing mechanisation.
Bord And Pillar Mining Use Mechanised. Bord And Pillar Mining Equipment Ekhayawhiterivercoa. Bord and pillar mining coal and coal mining te ara this diagram shows the traditional method of bord and pillar mining miners first extracted coal along roadways or bords while the coal in between the bords get price toward pillar design to prevent col.
Traffic Safety Concerns – Due to the large mechanised fleet of equipment required for room and pillar, many piece of equipment must work in close proximity. Traffic accidents and safety of the workers can be an issue. Return to Top. Ventilation For main article on ventilation click here. Hard rock room and pillar mines are generally quite large.
Bord and Pillar workings without compromising the safety factor 1.1 Aim of the study: The goal of the present investigation is evaluation of the extraction ratio of the Bord and Pillar working. This is achieved by addressing the following specific objectives.
This paper deals with the use of continuous miner and its success in bord & pillar method of underground coal mining. ... support mechanised operation. Production Potential Over 500,000 tonnes per ...
The bord width is the extent of the reef that is mined out by mechanised operations between the supporting pillars of reef left in place to hold up the roof of the workings. The Aquarius announcement said its Marikana and Kroondal operations would be affected and added that the instruction applied to all mechanised bord and pillar mines in the North West.
Bord And Pillar Method. Mechanised mining, using Continuous Miner (CM) bord and pillar sections, has been successfully introduced into Indian coal mines for more than a decade. This milestone was possible only with the concurrent introduction of advanced technology with …
Bord pillar method of working click here to download notes for bord pillar method of working notes cover following topics bord and pillar method schemes of development design of bord and pillar working statutory provisions selection of equipment for development mechanised loaders continuous miners atory arrangement for depillaring.
The underground mining methods we use include room and pillar narrow vein stoping and large-scale mechanised mining. Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them . Bord and pillar miningCoal and coal miningTe Ara . Bord and pillar mining Next.
Room (Bord)-and-Pillar Layout. Figure shows Room and Pillar Mining. ... but the hard rock sector too is working hard to develop new mechanised, and continuous, systems.
Bord pillar method of working click here to download notes for bord pillar method of working notes cover following topics bord and pillar method schemes of development design of bord and pillar working statutory provisions selection of equipment for development mechanised loaders continuous miners atory arrangement for depillaring.
Mechanised bord and pillar mining method is used to extract ore over average stoping width of 2m. Historically, the bord widths have varied from 15m to 6m wide, depending on the ground control district. Minimum pillar sizes are dependent on depth to give a safety factor of greater than 1.6, ...
Mechanised mining, using Continuous Miner (CM) bord and pillar sections, has been successfully introduced into Indian coal mines for more than a decade. This milestone was possible only with the concurrent introduction of advanced technology with rock bolting to provide reliable safe support.
2005-01 Change over from Board and pillar TCut to Dip pillar 1 / 19 Change over from Board and Pillar T/Cut to Dip Pillar Mechanised Mining Improving Grade and Profitability LEON DU PREEZ Business Area Manager Rustenburg Platinum Mines Ltd Frank Shaft SYNOPSIS
27-02-2016· APPLICABILITY OF BORD AND PILLAR METHOD The Bord and Pillar method is adopted for working. 1. A seam thicker than 1.5 m, 2. A seam free from stone or dirt bands. Stone or dirt bands, if present in a seam, can be easily disposed of for strip packing in long wall advancing method of mining. 3. Seams at moderate depth, 4. Seams which are not gassy, 5.
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Bord-and-pillar mining explained Illawarra Mercury. Jun 01, 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 get price
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07-10-2018· In a fully mechanised bord and pillar mining system, winning of coal and its transportation from the face is commonly carried out with the combination of (A) continuous miner, shuttle car, feeder breaker and belt conveyor (B) continuous miner, LHD, feeder breaker and chain conveyor (C) continuous miner, SDL, feeder breaker and belt conveyor
Conventional mechanised The layout of conventional mechanised bord and pillar method is similar to the continuous miner bord and pillar section discussed above. The key difference is on the operational working cycle and method of coal winning. There are six cycles of operation in the face preparation and production sequence in a conventional mechanised section.
mechanized bord-and-pillar mining layout for a given piece of ground (Vlakpoort and Moddergat) using a given selection of machines. This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18° with adverse strike and dip changes. Two bord-and-pillar layouts were designed for this area.
Bord And Pillar Mining Use Mechanised. Pick-and-shovel mining (1st of 3) next these west coast miners from the end of the 19th century pause in their labours.The traditional technique for extracting coal, which miners brought from britain, depended entirely on muscle.
The vertical shafts target both the Merensky Reef and UG2 Reef horizons, whilst the shallow, mechanised Bathopele targets only the UG2 Reef. Mining method: • Vertical shafts: conventional scattered breast mining; • Mechanised declines: bord and pillar. Apart from the underground operations, there are also two tailings retreatment operations:
pillars for use with a mechanised mining operation at depths of between 850 and 1 200 metres below surface. INTRODUCTION 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
SUCCESS OF MECHANISED DEPILLARING USING LOAD HAUL DUMPERS (L. SUCCESS OF MECHANISED DEPILLARING USING LOAD HAUL DUMPERS (LHDS) IN SINGARENI COLLIERIES.Due to historical facts of working of bord and pillar method . MECHANISED DEPILLARING WITH SDL AND CHAIN CONVEYOR AT PATHAK.