Underground Mining Bord And Pillar

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Vijaya Raghavan* Dr Syed Ariff** Paul Prasanna Kumar***

3 1 Overall working of bord and pillar method of mining using Continuous Miner The bord and pillar method of mining is the older and traditional method of underground coal mining This method is sometimes called room-and-pillar mining Coal is removed from the working faces as the rooms are advanced Cross-cuts

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Definition of bord

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

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Design of Bord and Pillar method in coal mines

Feb 27 2016One 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

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Every time you go underground we're there with you — with specialized equipment that's quality-built from top to bottom and innovations to help you work more safely and efficiently You can also count on us for deep product and application expertise both from dedicated Underground Mining specialists and dealers Talk with us to find the underground solutions you need

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Pillar Extraction using Continuous Miners

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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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 time that the workings are required to be serviceable In underground mining first

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CONTINUOUS MINER – Mining Science and Technology

Home / Bord Pillar / Equipment / CONTINUOUS MINER CONTINUOUS MINER Equipment 0 Comment In underground mining first and foremost in the modernization process are the machines that extract coal primarily the continuous and longwall miners First introduced in the late 1940's continuous miners provided a quantum leap in the speed and

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The Duncan Method of Partial Pillar Extraction at Tasman

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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Underground Mining

Underground Mining Throughout the years Moolmans has built extensive experience in coal platinum gold copper and manganese mining encompassing various mining methods such as bord and pillar and long hole stopping as well as the expertise to undertake any metalliferous mining venture from conception to execution and completion

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Geotechnical Aspects of Place Change Mining at Ensham

ABSTRACT The Ensham bord and pillar mine in the central part of the Bowen Basin is developing panels in the 5-6 m thick Aries/Castor Seam using the place change mining method The development mining height is typically 3 5 m with the remaining floor coal and bell outs extracted on retreat The depth of cover ranges from 45 m up to 150 m

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Joy

In 2012 IMM – a group of highly regarded underground mining equipment companies in China – was acquired and their roadheader controls and shearer products were brought into the Joy room and pillar and longwall product lines The innovation continues Joy equipment is used in all areas of underground mining including energy minerals such

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Open Cut or Underground Mining

Oct 21 2017Coal is the largest portion of underground mining It represents 60 percent of global coal production Besides coal underground can be used to mine gold or copper In underground mining there are two methods bord-and-pillar and longwall Bord-and-pillar Bord-and-pillar is the oldest mining method A grid of tunnels is created in the areas

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Underground Coal Mining

Underground Coal Mining Underground mining involves opening one or more portals or shafts into the earth that follow or intercept coal seams that are too deep for surface mining methods Two main methods of underground mining are practiced in Pennsylvania Room-and-Pillar Generally used for seams that are relatively flat or gently dipping As

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Defining a representative overall equipment effectiveness

underground bord and pillar coal mining by C Norden* and J Ismail* Synopsis The purpose of this article is to show how a representative overall equipment effectiveness (OEE) measurement can be calculated for an underground coal mining bord and pillar batch process The calculation method the typical losses (which include planned and

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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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Research Report on the Coal Pillar Recovery under Deep

RESEARCH REPORT ON THE COAL PILLAR RECOVERY UNDER DEEP COVER Office of Mine Safety and Health Research 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

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Case Studies of Tendon Support Design In Bord And Pillar

Abstract Southern African underground Platinum and Chrome Mines exploit the tabular platinum- and chrome-bearing orebodies using either conventional mining methods making use of jackhammers and air legs mechanized bord/room and pillar mining layouts or a combination of the two locally referred to as Hybrid mining methods

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Coal Mining Methods

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

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bord and pillar mining equipment

bord and pillar mining equipment (PDF) Underground Mining Methods Room and Pillar method 2015510enspenspUnderground 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

On August 9 the commission announced its final decision which was to approve part of the application It said this was because mining operations have been approved until 2022 and bord-and-pillar mining has been acknowledged by the proponent and department as a less intensive and environmentally impacting activity than longwall mining

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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

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Bord and Pillar Coal Cutting Machine ~ Mining

Jan 22 2014Coal cutting machine is used in bord and pillar mining method of underground coal mining to make Undercut Overcut or Middlecut to provide free face for the blasting operation Development by CCM The headings are Undercut Overcut or Middle Cut by a coal cutting machine and shot holes are then drilled and charged with explosives and blasted

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Bord And Pillar Mining Equipment

bord and pillar mining - Newest Crusher Grinding Mill bord and pillar mining Room and pillar mines Mining Techniques Underground Mining 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

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Room and Pillar Mining

When it comes to underground mining there are different ways to approach removing coal depending its structure and location At the current Carlisle Mine and developing Bulldog Mine Sunrise Coal is using the room and pillar mining method At the developing mine in Clay City Indiana coal is close to the surface and will require surface mining

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NSW Mining Methods

The two main types of underground mining in NSW are bord-and-pillar and longwall 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

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

Bord and Pillar method of mining Bord and Pillar method of mining is one of the oldest methods of mining 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

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Types of Underground Mining Method Comparison

In any discussion of Methods of Underground Mining Comparison one is repeatedly confronted with the difficulty of dealing with so many variable conditions It is not an exact science and in the choice of a method each varying factor has a certain weight which in many cases experience alone can determine

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Continuous Miners For Cutting Coal Soft Materials

MC470 continuous miner is the ideal choice for room and pillar coal mines salt and potash mines and other operations that demand the highest cutting force The miner effectively integrates proven technologies to offer high advance rates under tough mining conditions and in restricted spaces

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Pillar Extraction

Abstract 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

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Pillar Strength and Design Methodology for Stone Mines

Pillar Strength and Design Methodology for Stone Mines Gabriel S Esterhuizen Sr Research Engineer Dennis R Dolinar Lead Research Engineer John L Ellenberger Lead Research Scientist NIOSH-Pittsburgh Research Laboratory Pittsburgh PA ABSTRACT Underground stone mines in the United States make use of the room-and-pillar method of mining

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Australian mining

Bord-and-pillar Bord-and-pillar or room-and-pillar is the oldest underground mining technique and was common throughout 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

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bord and pillar coal mining ppt

bord and pillar mine mining ppt design of bord and pillar method in coal mines - slideshare feb 27 to design pillar in coal mines one of such methods is the bord and pillar method of mining bord and pillar method of mining is one of the Contact Supplier

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