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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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Bord And Pillar Mining Use Mechanised 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 get price toward pillar
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22 01 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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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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Room and Pillar Mining is Safe Efficient Environmentally Friendly Room and pillar mining is a non-subsidence plan for a mine preserving the precious farmland above It is among the safest and one of the most ecologically-friendly approaches to mining coal today creating a non-subsidence environment (no movement of land) and maintaining clean water standards
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Design of Bord and Pillar method in coal mines 1 Design of BORD AND PILLAR method in coal mines AASHUTOSH CHHIROLYA B TECH (MINING) 6TH SEM AKS UNIVERSITY SATNA MP 2 INTRODUCTION The importance of mining is definitely significant to human civilization
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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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Mining Systems Mining Systems Sigra's staff are well versed in the usual coal mining techniques of Bord and pillar development Wongawilli extraction Longwall extraction In addition it has innovated to produce alternative mine designs One of these is the sluiced hydraulic longwall mining system This was designed for moderately sloping seams (10 to 35
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22 01 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 Mining and mill throughput capaciites full profiles of select mines and projects deepest underground mines wessels is an underground bord and pillar operation with a current capacity of approximately 12 mtpa of rom production 100 per cent basis processin
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Room (Bord)-and-Pillar Layout Figure shows Room and Pillar Mining 6 Underground mining: room-and-pillar mining of thick seams –"Benching" Different approaches allow either the top or bottom part of the seam to be mined out first Note: the "hangingwall" is above the mining cavity and the "footwall" is below it Figure shows Room
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When pillar recovery is planned in multiple seams it is critical to properly design the mining sequence and panel layout to minimize potential seam interaction This paper addresses geotechnical considerations for concurrent pillar recovery in two coal seams with 21 m of interburden under about 305 m of depth of cover The study finds that
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• Pillar sizes will generally range from 30 to 100 feet and have a rectangular configuration • Extraction Ratio is the ratio of coal removed compared to estimated in-place tonnage – normal extraction ratio is from 35 to 55% – retreat mining will result in extraction ratios of up to 70%
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This paper describes the economic study of longwall versus bord and pillar mining using all continuous miners for a colliery located at the South Coast district of New South Wales Australia In this district longwall mining appears to be a better economic proposition than bord and pillar The internal rate of return on investment is
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12 01 2014You should have joined in on the debate as it was not mentioned about a certain depth for Bord and Pillar but a mention by a Mining Engineer that at greater depth there was need for larger pillars with his link to the Coalbrook disaster in South Africa in 1960
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Pillar-supported mining methods such as bord and pillar require a reliable design system for them to be successful This paper presents an evaluation of the current hard-rock mining pillar design systems as applied to a practical large-scale narrow-reef platinum mining feasibility study
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24/03/2013Bord and pillar (same as board I guess) Post and Stall Stall Worked and here is one up for grabs for some reason I cannot shake off the thought that I recall this method being referred to as Pillar and Post locally at least I know that it seems to be nonsensical by virtue of both terms being support methods but we are a queer lot in this corner anyway (tail-gate
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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
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