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  • Pillar Extraction | SpringerLink
    Pillar Extraction | SpringerLink

    Feb 03, 2016· 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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  • West ia coal mininglittle pillar action - YouTube
    West ia coal mininglittle pillar action - YouTube

    Jul 17, 2013· West ia coal mininglittle pillar action , Principles of Room & Pillar Mining , Global Mining 118,863 views 2:59 Ashland Pennsylvania - Anthracite Coal Mine Tour .

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  • Pillar Extraction - an overview | ScienceDirect Topics
    Pillar Extraction - an overview | ScienceDirect Topics

    Extraction of coal from a pillar between two roads is practised in both cas With bord and pillar mining and subsequent extraction of pillars - dependent on the size of room and pillar widths - some 30% of part of a deposit is exposed through development and roads With longwall mining only 5% is involved in this way

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  • Room and pillar mining - Wikipedia
    Room and pillar mining - Wikipedia

    Coal mining is the process of extracting coal from the ground Coal is valued for its energy content and since the 1880s, has been widely used to generate electricity Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine – a pit, and the .

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  • Principles of Room & Pillar Mining - YouTube
    Principles of Room & Pillar Mining - YouTube

    Sep 10, 2012· This video provides a basic description of the room & pillar mining method for extracting coal underground It includes an explanation of the different products working together in a room & pillar .

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  • Coal mining | World Coal Association
    Coal mining | World Coal Association

    In room-and-pillar mining, coal deposits are mined by cutting a network of 'rooms' into the coal seam and leaving behind 'pillars' of coal to support the roof of the mine These pillars can be up to 40% of the total coal in the seam - although this coal can sometimes be recovered at a later stage

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  • Pillar Extraction using Continuous Miners | Introduction ,
    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

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  • Depillaring: Arrangement, Precautions and Pillar ,
    Depillaring: Arrangement, Precautions and Pillar ,

    Depillaring with stowing is a method of pillar extraction in which the goaf is completely packed with incombustible material and in generally practised where it is necessary to keep the surface and strata above the scam intact after extraction of coal The following circum­stances would require adoption of depillaring with stowing:

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  • coal mine roof fall afrter pillaring - YouTube
    coal mine roof fall afrter pillaring - YouTube

    May 03, 2012· this is what happens after the pillars have been removed A normal day at work for a coal miner

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