bord and pillar coal mining ppt - bondhumahalin power point presentation on board and pillar mining to design pillar in coal minOne of such methods is the Bord and Pillar method of mining Bord and Pillar Live Chat; coal mining methods in india ppt presentation
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 ,
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
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
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 ,
View Test Prep - BORD AND PILLAR METHODpptx from ENG 286 at Davidson College Under Ground Mining Board and Pillar Method Branch : Mining and Min Surveying Engg , ANSHU PPT MININGpptx View more Study on the go , UnderGround Coal Miningpdf 39 pag Appears to be wide scatter Significance can only be evaluated by comparing
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 .
We have bord and pillar coal mining ppt,Room And Pillar Coal Mining Ppt 2 Room BordandPillar mining or continuous mining method It is the most common supported pillar method designed and used primarily for mining flatlying seams or tabular orebodies or gently dipping bedded ore deposits of limited thickness like coal oil shale limestone phosphate salt ,
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 .
Underground mining at Khutala is done using the conventional bord and pillar workings with continuous miners To date the coal has been mined using double pass drum miners in a conventional application The development panels of Khutala are advanced on the floor of the seam leaving the topcoal to be removed on the final retreat
Gr5finalUnderground Mining Method Ppt - Free download as Powerpoint Presentation (ppt / pptx), PDF File (pdf), Text File (txt) or view presentation slides online Underground Mining Methods Group 5 Underground Mining Methods Coal Mining Metal Mining Bord and Pillar Unsupported Mining Supported Mining Caving mining Longwall Room and Pillar Cut and fill ,
bord and pillar coal mining ppt grinding mill belt conveyors principles for calculation and design; A half-century of technological innovation - One of such methods is the Bord and Pillar method of mining Get Price And Support Online; bord and pillar mining conveyor methodology - perfex
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 ,
Background review: subsidence from coal mining activities Major underground coal mining in Australia mainly occurs in the coal basins of New South Wales and Queensland Longwall is currently the most common method of underground coal mining in Australia, as it is safer and more efficient in extracting coal than other extraction techniqu
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 (gallery) .
typical bord and pillar mine plan ppt BINQ Mining Ensuring rib stability during pillar extraction is of prime importance in bord and pillar (b this has necessitated the need to revisit the concept of rib stability the stress coming on the rib is estimated with the use of numerical modeling technique &p) method of underground coal mining with .
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
Basic parameters of bord and pillar mining system 1 Gallery (bord) 2 Pillar 3 Junction Calculation of percentage of extraction during development If coal from the full seam thickness is extracted, the percentage of extraction during development is nearly 20% in deep mines and 35% in shallow min
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 Geological Hazard Tendency Analysis of Room and Pillar Mining .
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
Bord And Pillar Mining Equipment bord and pillar coal mining ppt Cutter Bits CLASSIFICATION OF BORD AND PILLAR MINING SYSTEM Develop the entire area into pillars and is specialized in coal mining, coal mining, transportation equipment, >>Price; Dartbrook bord and pillar EIS to be submitted this month
•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
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 The other countries where Bord and Pillar method ,
Bord Pillar Method Mining Coal Scribd Bord pillar method free download as powerpoint presentation t, pdf file f, text file t or view presentation slides onlinenderground coal mining bord and pillar mining method bord and pillar mining get price Bord Pillar Mining ,
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 ,
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
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
typical oreflow system in a bord and pillar coal mine 2 Bord And Pillar Coal Mining Ppt Bord and pillar mining (also known as room and pillar mining) evaluation of underground coal pillar design [email protected] Geotechnical factors of a nearby underground coal mine has been determined in prevalent in the Indian underground mines is the Bord and Pillar method of
These make possible even fuller recovery of the available coal, while removing the machine operator further from the working area Continuous miners operate a room and pillar mining system A series of 18 to 20 foot wide rooms are driven in the coalbed with pillars or columns of coal ,
Bord And Pillar Mining Equipment bord and pillar coal mining ppt Cutter Bits CLASSIFICATION OF BORD AND PILLAR MINING SYSTEM Develop the entire area into pillars and is specialized in coal mining, coal mining, transportation equipment, >>Price; Dartbrook bord and pillar ,