Bord-and-pillar mining was then compared to conven-tional mining according to the following: financial analysis, dilution and flexibility. Conclusions could now be drawn to the appropriateness of bord-and-pillar mining in Vlakpoort and Moddergat. Results Geology of Vlakpoort and Moddergat The UG2 Chromitite Layer sub-outcrop strikes approximately north-west–south-east and occurs over a short
EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Bachelor of Technology In Mining Engineering By RAM CHANDRA NAYAK 10605015 & SANGRAM KESHARI DALAI 10605027 Department of Mining Engineering National Institute of Technology Rourkela-769008 2010 . EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL
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. In fact, as one of the earliest of human enterprises, mining and its development correlate closely with cultural progress. Mining
Coal Mining The goal of coal mining is to economically remove coal from the ground. Coal is valued for its energy content, and since the 1880s is widely used to A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow id: 42d752-ZTVjY
Coal mining methodsCoal mining methods Room (Bord)Room (Bord)--andand--pillar pillar (Continuous miner and shuttle car) 2222. WongawilliWongawilli method and break line method and break line support(Bt(LBSL)S)t (BLS) 2323. Long all miningLongwall mining Shield Supports Shearing Machine Stageloader & Armored Face Conveyor Belt Tailpiece Drive Unit For Armored Face Conveyor 2424.
29/07/2016· Bord and pillar is an underground mining method for extracting coal from belowground of earth. Various machinery combinations are used for extracting. One of the combination is the continuous
10/09/2012· 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
Room and Pillar Mining Method 1. Hassan Z. Harraz [email protected] 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors. Permission of the author and publisher is required for any
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
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 acted as pillars holding up the roof. Then the outer pillars were mined, leaving the roof to collapse in a controlled way as miners retreated to the exit. Share this item Post to Pinterest Post to Facebook Post to Twitter. Using this item
In coal mining: Development of continuous mining loading, developed in association with room-and-pillar mining. The oldest of the basic underground methods, room-and-pillar mining grew naturally out of the need to recover more coal as mining operations became deeper and more expensive.
COAL MINING TECHNOLOGY A Presentation by MANOJ KUMAR SINGH Manager(IE), NCL-HQ, Singrauli(MP)-486 889 E-mail : [email protected], M-9993875526 . MINING TECHNOLOGY •Shovel-Dumper •Dragline •Surface Miner OPENCAST MINING TECHNOLOGY •Bord & Pillar •Side Discharge Loader(SDL) •Load Haul Dump(LHD) •Continuous Miner •Longwall •Shortwall Mining UNDERGROUND MINING
Coal Mining-Methods. Mining Methods Coal is mined by two main methods surface or opencast mining and underground mining.. The choice of method is largely determined by the geology of the coal deposit; the majority of the world's coal reserves are recoverable by underground mining. The method used is determined by the depth of coal deposit and the overburden over it.
Longwall mining or coal pillar extraction by any other method causes the roof to subside and the floor to heave. Greater use of longwall mining, replacing bord-and-pillar mining, will improve resource recovery. In case of thick seams, sublevel caving, hydraulic mining, and multislice longwall methods deserve special attention. In addition to the selection of a suitable mining method
bord and pillar coal mining ppt Roadheaders. bord and pillar coal Bordandpillar mining in inclined orebodies Reduce mining costs by increasing the production tonnage coal hammer crusher for sale india Chat Online. Get Price. CONTINUOUS MINER Mining Science and Technology . These make possible even fuller recovery of the available coal, while removing the machine operator further from the
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