pillar extraction mining method south africa

pillar extraction mining method south africa

pillar extraction mining method south africa
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An integrated risk management approach for underground experiences with this mining method The results of these visits, together with an extensive literature r

pillar extraction mining method south africa

  • An integrated risk management approach for underground

    experiences with this mining method The results of these visits, together with an extensive literature review of local pillar extraction planning and design consider ations2–4 showed that little in the way of new technologies, ideas or mining methods has been developed in South Africa in recent years (except for the NEVID method) (Incidentally, NEVID is an acronym named after thepillar extraction that may benefit future pillar extraction in South Africa Four of the operations visited conducted full pillar extraction while the remaining three conducted partial pillar extraction This paper will present past and current pillar extraction methods used in New South Wales and will Coal pillar extraction experiences in New South Wales by GH Lind* Synopsis New South WalesCoal pillar extraction experiences in New South Walesspecific legislation pertaining to pillar extraction, mining methods, the role of temporary supports and training are described It is found that some of these factors have useful attributes which could be used to design a methodology for extraction of underground coal pillars in the Witbank and Highveld coalfields of South Africa * Department of Mining Engineering, University of PretoriaKey success elements of coal pillar extraction in New

  • Task 25 Coaltech

    The development of new and improved pillar extraction mining methods at shallower depth also holds large potential The project incorporates a literature survey of previous work done and various site visits with the objective of identifying potentially suitable mining methods as well as limitations, shortcomings and factors constraining these methods These include environmental impacts· 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 permutationsPillar Extraction | SpringerLinkSouth Africa's coalfields — A 2014 perspective P John Hancox, Annette E Götz, in International Journal of Coal Geology, 2014 44242 Exploration and exploitation history Mining in the Sigma subbasin began in the early 1950s at the Sigma Colliery Early bordandpillar extraction mining methods however left much of the resource unmined, and during the 1960s total extraction methodsPillar Extraction an overview | ScienceDirect Topics

  • Pillar design incoalmines SAIMM

    wall mining methods, bordandpillar 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 disturbances, maintenance ofthe integrity ofthe roofMINING METHODS Both opencast and underground mining methods are employed in South Africa for extraction of coal reserves There are three different mining methods that are commonly used in underground mines in South Africa The most common technique is the ’bord and pillar’ method This method is ideal for relatively shallow depositspillar extraction mining method south africaPillar design in coal mines Pillar design in coal mines by H WAGNER*, D Eng (Member) SYNOPSIS The paper points out that bordandpillar mining is the most important method of coal extraction in South Af~ican underground coal mines, and advocates that pillar design procedures should be refined to make more rationalpillar extraction mining method south africa

  • Task 25 Coaltech

    The development of new and improved pillar extraction mining methods at shallower depth also holds large potential The project incorporates a literature survey of previous work done and various site visits with the objective of identifying potentially suitable mining methods as well as limitations, shortcomings and factors constraining these methods These include environmental impactsSouth Africa's coalfields — A 2014 perspective P John Hancox, Annette E Götz, in International Journal of Coal Geology, 2014 44242 Exploration and exploitation history Mining in the Sigma subbasin began in the early 1950s at the Sigma Colliery Early bordandpillar extraction mining methods however left much of the resource unmined, and during the 1960s total extraction methodsPillar Extraction an overview | ScienceDirect TopicsPillar extraction practices in South Africa have consumed a significant proportion of safety and fatality statistics in relation to its relative output (less than 5% of total South African coalRisk management of underground coal pillar extraction in

  • SOUTH AFRICA’S COAL INDUSTRY OVERVIEW, 2014

    Both opencast and underground mining methods are employed in South Africa for extraction of coal reserves There are three different mining methods that are commonly used in underground mines in South Africa The most common technique is the ’bord and pillar’ method This method is ideal for relatively shallow deposits where overlying rock pressure is low Seams are mined leaving in situThuthukani shaft pillar, Kloof Operations, South Africa RT Masethe1, 2, RJ Durrheim1 and MSD Manzi1 1University of the Witwatersrand, South Africa 2SibanyeStillwater Limited, South Africa All seismic data recorded since the extraction of the Thuthukani shaft pillar commenced in January 2007, has been analysed Seismicity was compared in two fiveyear periods (1 January 2007 to 30The seismic response to mining during the extraction ofshallow depths at Xstrata Coal South Africa (XCSA) has been further developed and implemented as part of an ongoing improvement process addressing all of the relevant legal and associated risk aspects This work follows on from the previous pillar extraction work carried out at the ATC, Boschmans, and Spitzkop Collieries The process involved a number of inhouse workshops and sessionsManaging the geotechnical and mining issues

  • TECHNOLOGY OF EXTENDED PILLAR RECOVERY IN ROOM AND PILLAR

    The technology of coal mining by the room and pillar method (RPM) has been widely applied all over the world In the USA more than 56 mines use it as the dominant technology In 2015 coal production by the underground method made 350 Mt in the U SA, includin g 150 Mt by the room and pillar system [1] RPM is also o perated in mines of Australia, China, Canada and South Africa This system isWork at mine 1 was stopped in 2015 due to pillar instability but an Eskomapproved project to relocate mine 1 access is currently in the implementation phase Mine 2 and mine 3 use both bordand pillar and shortwall methods to mine seam 2 (S2) and seam 4 (S4) coal seams In 2019, Matla continued with pillar extraction (stooping) as a mining method to maximise Resource extraction At mine 2Major Mines & Projects Mining Intelligence and NewsPillar design in coal mines Pillar design in coal mines by H WAGNER*, D Eng (Member) SYNOPSIS The paper points out that bordandpillar mining is the most important method of coal extraction in South Af~ican underground coal mines, and advocates that pillar design procedures should be refined to make more rationalpillar extraction mining method south africa

  • Ribpillar mining at Sigma Colliery (Journal Article

    · South Africa De Beer, J JS, Hunter, F, and Neethling, A F 1991 "Ribpillar mining at Sigma Colliery" South Africa abstractNote = {The paper describes the ribpillar extraction method now used at Sigma Colliery in the Orange Free State In this method, access roadways (with a high safety factor) are developed into a block of coal suitableThe development of new and improved pillar extraction mining methods at shallower depth also holds large potential The project incorporates a literature survey of previous work done and various site visits with the objective of identifying potentially suitable mining methods as well as limitations, shortcomings and factors constraining these methods These include environmental impactsTask 25 CoaltechMINING METHODS Both opencast and underground mining methods are employed in South Africa for extraction of coal reserves There are three different mining methods that are commonly used in underground mines in South Africa The most common technique is the ’bord and pillar’ method This method is ideal for relatively shallow depositspillar extraction mining method south africa

  • pillar extraction mining method south africa

    pillar extraction mining method south africa T01:01:15+00:00 Coal pillar extraction experiences in New South Wales Pillar extraction, as an alternative high extraction system to longwalling, is practiced successfully in Australia (New South Wales) and the USA, but only to a limited extent in South Africa File Size: 1021KB Key success elements of coal pillar extraction in Newby bord and pillar mining and it was therefore assumed that this technique accounted for 100% of the total registered coal output For the time between 1970 and 1994, when other mining methods such as opencast mining, longwall mining, and total pillar extraction increased their influence, no accurate production data could be found However, characProbability of failure of South African coal pillarsfor pillar extraction developed for South Africa situa­ tions The operations visited in New South Wales were a combination of partial and full pillar extraction methods All of the mining methods were designed around specific health and safety, economic and en­ vironmental requirements of the individual opera­ tions The choice of a partial versus a full extraction system appeared to beThe 19th International Mmmg Congress and Fair of Türke

  • Assessing Pillar Geometries in the Witbank and Highveld

    consider for pillar recovery Introduction South Africa’s coal mining industry, which is a little more than a century old, has been based predominantly on the bord and pillar method of mining In the late 1970’s and 1980’s longwall mining methods, based mainly on European practice and equipment,· Compared to other mining methods, roomandpillar mining is a lowcost method with a low recovery rate (since some ore is left behind in pillars) Yet, the method causes very little dilution as the contact between ore and waste is limited due to the waste being on top and ore being at the bottom Direct operating costs for roomandpillar method range from $5$20/tonne Some variations of theTypes of Mining Methods | Sell Side HandbookCoal Mining Methods of Extraction Underground Mining Underground Mining Most coal seams are too deep underground for opencast mining and require underground mining, a method that currently accounts for about 60 percent of world coal production In deep mining, the room and pillar or bord and pillar method progresses along the seam, while pillars and timber are left standing toCoal Mining Methods of Extraction Underground Mining