pillar mining board

  • 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

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  • Mining Funda: Bord and Pillar method of Mining

    Nov 21, 2019· Bord and pillar mining method comprises two phases i.e DEVELOPMENT and DEPILLARING. Sometimes both these phases proceeds simultaneously. In development, pillars

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  • Bord and pillar mining Coal and coal mining Te Ara

    Bord and pillar mining Next. This diagram shows the traditional method of bord and pillar mining. Miners extracted coal along roadways or bords, with the coal between the bords acting as pillars holding up the roof. The outer pillars were then mined, leaving

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  • Bord & Pillar Method Mining Coal

    Bord AND PILLAR MINING METHOD comprises of two phases: development and depillaring. Pillars are formed by driving a series of narrow roads (headings) or galleries in the seam. Percentage of extraction during development is nearly 20% in deep mines and 35% in shallow mines.

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  • Board & Pillar SlideShare

    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

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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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  • Bord and pillar mining method || underground mining method

    Dec 17, 2019· Hi everyone, In this video we are discussing about the underground mining method,basically what is bord and pillar mining method,wha...

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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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  • 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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  • Mining Pillar Innovations

    Pillar knows how overcome industry challenges, underground and aboveground, including cost pressures increased regulatory oversight. Pillar’s founding philosophies include delivering service and support solutions that reduce costs, increase productivity, and enhance safety. We are MSHA trained to take on mining projects safely.

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  • Mining Funda: Bord and Pillar method of Mining

    Nov 21, 2019· 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,

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  • Bord & Pillar Method Mining Coal

    Bord AND PILLAR MINING METHOD comprises of two phases: development and depillaring. Pillars are formed by driving a series of narrow roads (headings) or galleries in the seam. Percentage of extraction during development is nearly 20% in deep mines and 35% in shallow mines.

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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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  • Bord and pillar mining method || underground mining method

    Dec 17, 2019· Hi everyone, In this video we are discussing about the underground mining method,basically what is bord and pillar mining method,wha...

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  • Bord and Pillar mining method, Definition, Working, PDF in

    Jun 21, 2020· underground mining में सबसे अधिक प्रचलित विधि है इस विधि में progress coal seam के साथ साथ आगे बढ़ती जाती है, और coal seam को coal pillars के रूप में काटते काटते board नुमा आकृति बनती जाती है

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  • BORD AND PILLAR METHOD.pptx Under Ground Mining Board

    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

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  • EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

    mining and its development correlate closely with cultural progress. Mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials. One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining.

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  • 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

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  • EVALUATION OF UNDERGROUND COAL PILLAR DESIGN

    Pillar mining is selecting the optimum pillar size. If the pillars are too large, then the extraction ratio decreases leading to less profitability and if the pillars are too small it endangers the overall mine safety. Indian mines have about 60 % of the coal blocked in the form of pillars. This investigation critically reviews the different

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  • Dangers of ‘pulling pillars’ long known in coal industry

    May 17, 2014· Retreat mining’s safety record improved somewhat in 2005 and 2006, when there was just one death nationwide during pillar recovery. The NIOSH report credited increased efforts by

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  • Two Rivers Platinum Mine: the orebody, the mining

    The mining method is a mechanized bord and pillar layout, which will yield a total of 185 000 tons at full run of mine production from the underground UG2 mine. 152 PLATINUM SURGES AHEAD An average dip of 8 degrees has been recorded from underground development and mining, which compares

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  • Pillar design QueensMineDesignWiki

    Post Pillars. Post pillars are used in cut-and-fill mining and they provide immediate support to the roof while enabling reasonably high extraction ratio. As the mining progresses, the pillars become more slender. This causes the stability to decrease during the first few cuts. Post pillars are designed to fail gradually with increasing height.

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  • Board & Pillar? Coal, Colliery and Mining Forum.

    Aug 16, 2013· (a) board and pillar (b) pillar and stall (c) room and pillar (d) stoop and room. The name varied depending upon the part of the country the mining took

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  • Productivity Improvement in Underground Coal Mines A

    Jan 01, 2013· bord and pillar mining method. side discharge loader (SDL) lead distance. 1. INTRODUCTION. India has emerged as the third largest coal producer in the world after China and USA with a 9% share of the total global coal production. While the coal production from underground mining in countries like China, USA and Australia are about 95, 33 and 20

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