2011 Underground Coal Operators’ Conference The AusIMM Illawarra Branch 8 10 – 11 February 2011 THE DUNCAN METHOD OF PARTIAL PILLAR EXTRACTION AT TASMAN MINE Kent McTyer1 and Tony Sutherland2 ABSTRACT: Mining commenced at Tasman Mine in late 2006The current method of mining is bord and
Continuous Miners For Cutting Coal & Soft Materials ,
double-pass miners use the most advanced cutting technology for the continuous mining of coal and soft materials Continuous miners cut and gather the material simultaneously and convey it into shuttle cars, haul trucks or a continuous haulage system They are typically used for full-scale production in room-and-pillar mining operations
bord and pillar coal mining ppt – Grinding Mill China mining is a type of underground mining used for the extraction of coal and the information in this presentation will bord and pillar; development; drift » Free Online Chat West Gulinia Coal Association | Room & Pillar Underground Mining
May 31, 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 underground space or room created to access the coal .
Bord-and-pillar mining in inclined orebodies - SAIMM
bord-and-pillar mining in narrow tabular steep dipping orebodies will depend on the extent of the research and development efforts which need to create and innovate technologies to overcome some of the current limitations stated in the above-mentioned parameters
UNDERGROUND COAL MINING: FACTORS, COST, AND TIME ,
Definition of Room and Pillar Mining • A system of extracting coal by driving a series of openings referred to as entries • Entries are connected to each other by driving cuts commonly referred to as cross-cuts • Remaining coal “blocks”, referred to as pillars, support the overlying strata
Oct 22, 2014· 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 ,
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 .
Bord-and-pillar: Bord-and-pillar, or room-and-pillar, is the oldest underground mining technique and was common in NSW before longwall mining began in the 1960s This method uses a grid of tunnels and involves progressively cutting panels into the coal seam whilst leaving behind pillars of coal ,
Oct 22, 2014· 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
room and pillar coal mining ppt Underground Mining: There are two main methods of extracting coal by underground mining: room-and-pillar (or, bord -and-pillar , The underground mine employs a modified room and pillar mining method , bord and pillar coal mining ppt » Learn More
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 ,
Jan 22, 2014· Coal 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
There are two main methods of extracting coal by underground mining: room-and-pillar (or, bord -and-pillar) and longwall mining Room-and-pillar minin g involves cutting a network of 'rooms' or panels into the coal seam and leaving behind 'pillars' of coal to support the roof of the mine
Definition of bord-and-pillar method A system of mining in which the distinguishing feature is the winning of less than 50% coal on the first working It is more an extension of the development work than mining The second working is similar in principle to top slicing
bord and pillar coal mining ppt - Cutting Head Room and pillar mining - Wikipedia The key to successful room and pillar mining is in the selection of the optimum pillar size In general practice, the size of both room and pillars are kept almost equal, while in Bord & Pillar, pillar size is much larger than bord ,
power point presentation on board and pillar mining
power point presentation on board and pillar mining PowerPoint Presentation Ensure the size of pictures is reduced to avoid designing a PowerPoint presentation which, income are linked to illegal mining,, on board ,
Bord and Pillar mining by continuous Miner in HINDI - YouTube
Jul 29, 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 .
Power Point Presentation On Board And Pillar Mining
bord and pillar coal mining ppt - godzalhetulonenbe bord and pillar coal mining ppt BORD & PILLAR LAYOUT 4 4/16/2013 BORD & PILLAR LAYOUT Main Elements Of Bord And Pillar Workings Size of the Panel Size of the Barrier Size of Pillars 5 the width of the barrier wider is the barrier and also softer the coal Greater the depth of working Online .
Design of Bord and Pillar method in coal mines - SlideShare
Feb 27, 2016· One of such methods is the Bord and Pillar method of mining Bord and Pillar method of mining is one of the oldest methods 3 INTRODUCTION In India, about 98% of underground output of coal is obtained by Bord and Pillar method and barely about 2% by longwall methods
Research Report on the Coal Pillar Recovery under Deep ,
RESEARCH REPORT ON THE COAL PILLAR RECOVERY UNDER DEEP COVER Office of Mine Safety and Health Research , University (WVU), a study of the recovery of coal pillars through retreat room-and-pillar mining practices in underground coal mines at depths greater than 1,500 ft The study
•Bord & Pillar is the traditional mining method used in India •It is employed where geo-mining conditions are complex •Coal is removed from the coal faces initially by developing a set of galleries leaving pillars in between to support the roof
Room and pillar mining was one of the earliest methods used, although with significantly more man-power The room and pillar system is used in mining coal, gypsum, iron, and uranium ores, particularly when found as manto or blanket deposits, stone and aggregates, talc, soda ash and potash
Problems encountered with the Old Ben system prompted the design of Wongawilli system of Pillar extraction, and the following parameters were set: 1 Provision of a single working place 2 Extraction of coal in stress relieved areas 3 Utilisation of the coal in stress as a support 4 Maximise extraction of [,]
PPT – Coal Mining PowerPoint presentation | free to ,
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 Methods Underground Mining Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United Stat Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of
Characterization of coal mine panels in bord and pillar ,
To describe a mining scene in a bord and pillar working, about twenty major fire risk parameters have been short-listed and, in accordance with the nature of contribution to the causes of spontaneous heating, these Characterization of coal mine panels in bord and pillar workings in respect of their proneness to spontaneous heating—a .
Productivity Improvement in Underground Coal Mines - A ,
Of the total output of coal from underground mines, more than 90% of coal is obtained by the bord and pillar method, the predominant method of mining followed in India, and the rest is mined by the longwall mining method The Indian coal mining industry has witnessed a persistent decline in underground coal production over the years with more .
Longwall Mining - an overview | ScienceDirect Topics
Dilip Kumar, Deepak Kumar, in Management of Coking Coal Resources, 2016 62102 Underground Mining Greater use of longwall mining, replacing bord-and-pillar mining, will improve resource recoveryIn case of thick seams, sublevel caving, hydraulic mining, and multislice longwall methods deserve special attention
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