Bord And Pillar Mining Method

Bord-and-pillar mining explained Illawarra Mercury

31/05/2017· Two main methods of extraction are used for underground coal mines in New South Wales: longwall and bord-and-pillar extraction. Bord-and-pillar extraction is the older of the methods

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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.

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Bord-and-pillar mining in inclined orebodies

proven mining method in these conditions and has a lower risk operational failure. Bord-and-pillar mining has some favourable promises such as improving labour difficulties, lowering operating costs and providing safer working conditions. The success of mechanized bord-and-pillar mining in narrow tabular steep dipping orebodies

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Design of Bord and Pillar method in coal mines

27/02/2016· One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods. 3. INTRODUCTION In India, about 98% of underground output of coal is obtained by Bord and Pillar method and barely about 2% by longwall methods. The other countries where Bord and Pillar method predominates are Australia

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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.

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL

have been approached keeping in mind the production and safety. One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods. The key to the successful Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too small the mine will collapse. If the pillars are

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NSW Mining Methods NSW Mining

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 coal to support the mine. This method has been in

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(PDF) Underground Mining Methods: Room and Pillar method

Underground Mining Methods: Room and Pillar method . Presentation (PDF Available) · February 2014 with 16,115 Reads How we measure 'reads' A 'read' is counted each time someone views a

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Room-and-pillar mining coal mining Britannica

Alternative Title: bord-and-pillar mining. Room-and-pillar mining of a horizontal ore body. Encyclopædia Britannica, Inc. Schematic diagram of an underground coal mine, showing surface facilities, access shaft, and the room-and-pillar and longwall mining methods. CONSOL Coal Group; Learn about this topic in these articles: mining. In mining: Room-and-pillar mining. The most common mining

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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

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Room and Pillar Mining Method SlideShare

22/10/2014· 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.

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Coal Mining Methods Colorado School of Mines

Coal Mining Methods Underground Mining Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United States. Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of the United States. Although widely used in other

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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.

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bord and pillar mining equipment rodiziogrill

bord and pillar mining equipment (PDF) Underground Mining Methods: Room and Pillar method. 2015510&ensp·&enspUnderground mining: roomandpillar mining of thick seams –"Benching" Different approaches allow either the top or bottom part of the seam to be mined out first.

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

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 Exhibitions. Undermanager's Office. Mining News. The Canteen. A

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Bord and Pillar Method Mining Classroom

The Depillaring can be understood by It's name(De-Pillaring). In Depillaring the working involves in the extraction of coal from the Pillars. These are two stages of this mining method. The another name of Bord and Pillar method is "Pillar and Stall". For the application of Bord and Pillar Method there are some conditions to be full filled.

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

The T-cut mining method is basically a partial pillar extraction method. The pillar (13 m x 13 m) created by the bord and pillar development is being stoped (only the UG2 reef) out for 2 m from the roadways on all sides, to leave an effective pillar of 9 m x 9 m. This method creates the required, higher extraction percentage and higher Run of

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Definition of bord-and-pillar method mindat glossary

Definition of bord-and-pillar method. A system of mining in which the distinguishing feature is the winning of less than 50% coal on the first working. It is more an extension of the development work than mining. The second working is similar in principle to top slicing. The remainder of the coal is won by a retreating system, the cover being caved after each unit has been worked. The term

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Bord and Pillar Method, Mine Ventilation, by OcS (www

8/05/2013· This video is a chapter in the e-learning course offered by Octave Simulation Services Pvt. Ltd. (ocatvesim) on Mine Ventilation Systems. Contact [email protected] to know details about

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The Duncan Method of Partial Pillar Extraction at Tasman Mine

2011 Underground Coal Operators’ Conference The AusIMM Illawarra Branch 8 10 11 February 2011 THE DUNCAN METHOD OF PARTIAL PILLAR EXTRACTION AT TASMAN MINE Kent McTyer1 and Tony Sutherland2 ABSTRACT: Mining commenced at Tasman Mine in late 2006.The current method of mining is bord and

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Bord & Pillar Mining Science and Technology

As bord and pillar workings are developed roof support becomes a major consideration and operating cost item. Support requirements vary considerably and are dependent on the physical conditions in the seam, which are often depth dependent, and the length of

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Pillar Extraction using Continuous Miners Introduction

PILLAR EXTRACTION USING CONTINUOUS MINERS. Overview. Now that longwall equipment has been developed to a stage where it is able to cope with most conditions satisfactorily, longwall mining is the most widely used method of secondary extraction. However, there are still mines and occasions where longwall mining is not suitable e.g.

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MINING METHODS T cmpdi

9 Blasting Gallery Method Conventional bord and pillar mining in thick seams is associated with very low percentage of extraction [around 30% in a panel] even under favourable conditions. Extensive development of pillars carried out

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Major Mines & Projects Wessels Mine

Mining Methods. Bord-and-pillar; Summary: Wessels is an underground bord and pillar operation with a current capacity of approximately 1.2 Mtpa of ROM production (100 per cent basis). Processing Technologies. Summary: Primary crushing of ore takes place underground, while secondary crushing forms part of the surface operations. ROM ore is washed and screened on the surface to produce

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Bounty to expand Cook using bord and pillar methods

BOUNTY Mining intends to expand operations at the Cook Colliery in Queensland to four underground mining areas, producing 2.2 million run-of-mine tonnes per annum using bord and pillar mining methods after raising $18 million through an initial public offering.

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Bord and pillar mining method pdf dirtycanadians

Characteristic of r & p it is the most common supported pillar method, designed and used primarily for mining flat-lying seams, or tabular orebodies, or gently dipping bedded ore deposits of 4/16/2013. bord and pillar method applicability of bord & pillar method вђў a seam thicker than 1.5 m. вђў a seam free from stone or dirt bands.

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Longwall Mining an overview ScienceDirect Topics

At present, production by longwall mining accounts for a minor amount of total underground mining production with the majority coming from bord-and-pillar methods. Since it is envisaged that longwall mining will require time to become established in India, bord-and-pillar methods will continue to be dominant in the foreseeable future. Thus, it

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Gr5finalUnderground Mining Method Ppt Mining Economic

Gr5finalUnderground Mining Method Ppt Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Underground Mining Methods Group 5 Underground Mining Methods Coal Mining Metal Mining Bord and Pillar Unsupported Mining Supported Mining Caving mining Longwall Room and Pillar Cut and fill Longwall Blasting galllery

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Increasing Production Time in Continuous Mining Methods

Increasing Production Time in Continuous Mining Methods EE Dorey D McGinness SYNOPSIS The use of continuous miners in a conventional bord and pillar section results in a considerable amount of unproductive time. This is due to the roof support requirements, continuous miner configurations, and shuttle car 'change-outs'. These factors have

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