bord and pillar mining method

Bord-and-pillar mining explained Illawarra Mercury

Bord-and-pillar mining is used in first workings of a deposit, and when irregularly shaped deposits, or sensitive environmental conditions, call for a lighter touch. This method is used

Room and pillar mining Wikipedia

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 is an area of active research. The technique is usually used for relatively flat-lying deposits, such as those that follow a particular stratum.

Design of Bord and Pillar method in coal mines

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. Seams with strong roof and floor which can

Bord-and-pillar mining in inclined orebodies

All the advantages of bord-and-pillar mining make this method sound like the ultimate cost effective and efficient mining method, but there are major restrictions to its application, e.g.: The thickness of the orebody in relation to the machine dimensions The maximum dip angle the machines can handle efficiently and effectively The percentage dilution, induced by fitting the proposed machines

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Bachelor of Technology In Mining Engineering By RAM CHANDRA NAYAK 10605015 & SANGRAM KESHARI DALAI 10605027 Department of Mining Engineering National Institute of Technology Rourkela-769008 2010 . EVALUATION OF BORD AND PILLAR MINING

Room-and-pillar mining coal mining Britannica

Other articles where Room-and-pillar mining is discussed: mining: Room-and-pillar mining: The most common mining system is room-and-pillar. In this system a series of parallel drifts are driven, with connections made between these drifts at regular intervals. When the distance between connecting drifts is the same as that between the parallel drifts, then a

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 acted as pillars holding up the roof. Then the outer pillars were mined, leaving the roof to collapse in a controlled way as miners retreated to the exit. Share this item Post to Pinterest Post to Facebook Post to Twitter. Using this item

Bord and Pillar Method of Working Coal Mining Coal

This method is sometimes called room-and-pillar mining. It is commonly used for flat or gently dipping bedded ores or coal seams. Pillars are left in place in a regular pattern while the rooms are mined out. In many Bord and Pillar mines that are nearing closure, the pillars are taken out, starting at the farthest point from the mine haulage exit, re treating, and letting the roof come down

(PDF) Underground Mining Methods: Room and Pillar

Underground Mining Methods: Room and Pillar method. Presentation (PDF Available) · February 2014 with 18,755 Reads How we measure 'reads' A 'read' is counted each time someone views a publication

Bord and Pillar mining by continuous Miner in HINDI

29.07.2016· Bord and pillar is an underground mining method for extracting coal from belowground of earth. Various machinery combinations are used for extracting. One of the combination is the continuous

Can bord and pillar fly in Australia? MiningMonthly

THE bord and pillar method is widely used for coal production in South Africa and has developed in efficiency and productivity in recent years. Mining Consultancy Services managing director of Australia Chris Wilkinson says a review of underground mining practices could find bord and pillar conducive to Australian conditions.

Bord & Pillar Method Mining Coal Scribd

BORD AND PILLAR MINING METHOD. Bord and pillar mining method comprises of two phases: 1. 2. Development or whole working: Pillars are formed. Depillaring or broken working: Extraction of pillars. Sometimes, both the phases proceed simultaneously. DEVELOPMENT WORK In development, pillars are formed by driving a series of narrow roads (headings

Pillar design incoalmines

wall mining methods, bord-and-pillar mining islikely toremain themostimportant method ofcoalextraction formany years tocome. Compared with the other methods ofcoalextraction, itoffers the advantages ofgreat operational flexibility, relative freedom in the sequence ofseam extraction, insensitivity to local and regional geological disturb- ances, maintenance ofthe integrity ofthe roof strata and

Mining Funda: Bord and Pillar method of Mining

Bord and pillar mining method comprises two phases i.e DEVELOPMENT and DEPILLARING. Sometimes both these phases proceeds simultaneously. In development, pillars are formed by driving a network of galleries, of which one set is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angles.

MINING METHODS T cmpdi

of mining methods. While opencast operations are now fully mechanized employing large capacity earth moving equipment, introduction of machinery in underground workings has been gradual. In conventional bord and pillar workings coal loading and transport have been mechanized, eliminating human labour and drudgery to a large extent. There have mostly been increasing use of Side Discharge

Room and Pillar Mining Method LinkedIn SlideShare

Room and Pillar Mining Method 1. Hassan Z. Harraz [email protected] 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors. Permission of the author and publisher is required for any

Depillaring: Arrangement, Precautions and Pillar

In a method of depillaring, known as the caving method, the coal of the pillars is extracted and the roof is allowed to break and collapse into the voids or the decoaled area, known as goaf. As the roof strata about the coal seam break, the ground surface develops cracks and subsides, the extent of damage depending upon depth, thickness of the seam extracted, the nature of strata, thickness of

Mines With Bord Pillar Method ostseepension-schmidt.de

Bord And Pillar Mining Coal And Coal Mining Te Ara . This diagram shows the traditional method of bord and pillar mininginers first extracted coal along roadways or bords, while the coal in between the bords acted as pillars holding up the roofhen the outer pillars were mined, leaving the roof to.

Longwall Mining an overview ScienceDirect Topics

Greater use of longwall mining, replacing bord-and-pillar mining, will improve resource recovery. In case of thick seams, sublevel caving, hydraulic mining, and multislice longwall methods deserve special attention. In addition to the selection of a suitable mining method, better knowledge of the geology, ground control, and layout planning will also contribute to improvement of resource

Longwall Mining an overview ScienceDirect Topics

Greater use of longwall mining, replacing bord-and-pillar mining, will improve resource recovery. In case of thick seams, sublevel caving, hydraulic mining, and multislice longwall methods deserve special attention. In addition to the selection of a suitable mining method, better knowledge of the geology, ground control, and layout planning will also contribute to improvement of resource

Pillar Extraction SpringerLink

Pillar extraction, (also referred to as retreat mining; pillar recovery; stooping; pillar robbing; and bord and pillar second workings) is the practice of forming a series of pillars and then partially or totally extracting some or all of the pillars, usually with mining operations retreating out of a panel. There are a number of basic pillar extraction methods, with numerous permutations

BORD AND PILLAR METHOD.pptx Under Ground

Under Ground Mining Board and Pillar Method Presentation By : Domendra Sahu,Vikas Enashwari Submitted to : Jeetraj sahu Branch : Mining and Min Surveying Engg.. Underground Mining. • Underground methods unsupported ,supported,and caving— are differentiated by the type of wall and roof supports used,the configuration and size of production openings,and the direction in which mining

Board & Pillar? Coal, Colliery and Mining Forum.

24.03.2013· Bord and pillar, (same as board I guess), Post and Stall, Stall Worked, and here is one up for grabs, for some reason I cannot shake off the thought that I recall this method being referred to as Pillar and Post locally at least, I know that it seems to be nonsensical by virtue of both terms being support methods, but we are a queer lot in this corner anyway (tail-gate corner that is, probably

BORD & PILLAR METHOD Mine Portal Blog

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 depillaring;designing the system of pillar extraction with caving and stowing; mechanisation in depillaring operation, multi-section and

Managing the geotechnical and mining issues

Bord Managing the geotechnical and mining issues surrounding the extraction of small pillars at shallow depths at Xstrata Coal South Africa by S.Z. Pethö*, C. Selai*, D. Mashiyi*, and J.N. van der Merwe* Synopsis Pillar extraction at shallow depths with small pillars that were not originally intended for secondary extraction can provide a huge benefit to the coal mining industry in those

Coal mining Choosing a mining method Britannica

Coal mining Coal mining Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many

COAL MINING TECHNOLOGY e-library WCL

UG MINING METHODS •Coal deposits are mined by cutting a network of ‘roads’ into the coal seam and leaving behind ‘pillars’ of coal to support the roof of the mine. BORD & PILLAR Method •It involves the full extraction of coal from a section of the seam or ‘face’ using mechanical shearers to

bord and pillar mining working photos trapkroeg.nl

NSW Mining Methods. Bord-and-pillar: Bord-and-pillar, or room-and-pillar, is the oldest underground mining technique and was common in NSW before longwall mining began in the 1960s This method uses a grid of tunnels and involves progressively cutting panels into the coal seam whilst leaving behind pillars of ,.. Know More . Rustenburg. Rustenburg is a shallow to intermediate level PGM mining

(PDF) Success of Continuous Miner in Bord and Pillar

use continuous miner in bord and pillar method. This technology not onl y increases the production but intends remote mining with safe working and requires less manpower compared

COAL MINING TECHNOLOGY e-library WCL

UG MINING METHODS •Coal deposits are mined by cutting a network of ‘roads’ into the coal seam and leaving behind ‘pillars’ of coal to support the roof of the mine. BORD & PILLAR Method •It involves the full extraction of coal from a section of the seam or ‘face’ using mechanical shearers to

bord and pillar mining working photos trapkroeg.nl

NSW Mining Methods. Bord-and-pillar: Bord-and-pillar, or room-and-pillar, is the oldest underground mining technique and was common in NSW before longwall mining began in the 1960s This method uses a grid of tunnels and involves progressively cutting panels into the coal seam whilst leaving behind pillars of ,.. Know More . Rustenburg. Rustenburg is a shallow to intermediate level PGM mining

(PDF) Success of Continuous Miner in Bord and Pillar

use continuous miner in bord and pillar method. This technology not onl y increases the production but intends remote mining with safe working and requires less manpower compared

Multi-seam coal mining SciELO

Multi-seam coal mining J o u r n a l P a p e r The Journal of The Southern African Institute of Mining and Metallurgy VOLUME 111 APRIL 2011 235 Table IV Panel parameters calculated using CSIR Mining-Tek W/H ratio: 2.2 B-Bord width: 6.8 Design No. H-Mining height W—pillar width C—centre to centre distance W/H ratio

Room and pillar mines, Mining Techniques, Underground

Room and pillar. Room and pillar is also known as bord and pillar is a mining system in which the mined material is taken out across a horizontal plane while leaving "pillars" of unscathed material to support the overstrain leaving open regions or "rooms" underground. It is normally utilized for fairly flat-lying deposits, like those that follow a meticulous stratum. The room and pillar system

Bord and Pillar Methods. Coal, Colliery and Mining Forum.

Mining Methods and Geology. Bord and Pillar Methods. Mining Methods and Geology. Long and Shortwall mining. Bord and Pillar Methods. Other Minerals. Opencast Mining. Geology. Rules and Suggestions. Information About Registrations. Welcome to Coal, Colliery and Mining. Suggestions. Rules. Help And How Too's. ANNOUNCEMENT> Announcements. Staff. General. Events, Gala's and

Matla Mine Mining Intelligence and News

Matla Mine 2 utilises both bord and pillar an total extraction coal mining methods to mine the 2 seam and proposes to mine the 4 seam in future. Total extraction of a wall in the northeast area is currently underway, but bord and pillar mining may also be utilised in that area if required. Matla Mine 3 previously utilised bord and pillar method coal mining to mine the 4 seam. It is proposed to

bord and pillar mining india grinding mill china

Room amp Pillar Mine Mine provides mining, gold In some room amp pillar mines, on retreat mining, the pillars are removed, allowing the roof to collapse. Photo is a Continuous Miner machine, More detailed bord and pillar coal mining ppt Grinding Mill China. bord and pillar coal mining ppt. Posted at October 9. See Details >

MINING METHODS |authorSTREAM

There are two main methods of extracting coal by underground mining: room-and-pillar (or, bord -and-pillar) and longwall mining. Room-and-pillar minin g involves cutting a network of 'rooms' or panels into the coal seam and leaving behind 'pillars' of coal to support the roof of the mine. Initially, recoveries are reduced (to 50-60 per cent) because of the coal left in the pillars however

PREVIOUS AND CURRENT MINING METHODS.

Mining method and equipment 4.2.1 General The bord and pillar mining layout will be maintained because of its reliability, flexibility, low capital cost, low working costs and large skills source availability (Woodruff, 1966). Increasing mechanization has resulted in