bord and pillar mining equipment - Know More

The fundamental concept of bord and pillar methods of mining is that the coal seam is divided into a regular block like array by driving through, Get Price Room Pillar Equipment - ,...

Major Mines Projects Wessels Mine - Know More

Mining Methods Bord-and-pillar Summary Wessels is an underground bord and pillar operation with a current capacity of approximately 12 Mtpa of ROM production 100 per cent basis Processing Technologi Summary Primary crushing of ore takes place underground, while secondary crushing forms part of the surface operations ROM ore is ....

Major Mines Projects Exxaro Coal Central ECC Mine - Know More

The remainder of the deeper reserves will be mined by conventional mechanised underground bord and pillar mining method Opencast mining activities currently targets the No 2 and 4 seam lower reserves, however all seams thicker than 05 m are considered during mining operations...

PDF Underground Mining Methods Room and Pillar method - Know More

Room-and-pillar mining method has a low recovery rate a large percentage of ore remains in place underground In many room and pillar mines, the pillars are taken out sta rting at the farthest ....

Bord and Pillar Coal Cutting Machine Mining - Know More

Jan 22, 2014 0183 32 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...

Productivity Improvement in Underground Coal Mines - Know More

The only way to achieve this is to reduce production costs by improving productivity, efficiency and the effectiveness of the equipment This paper aims to identify the various factors and problems affecting the productivity of underground coal mines adopting the bord and pillar method of mining and to propose suitable measures for improving them...

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL , - Know More

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES , Bord and Pillar method of mining is one of the oldest methods The key to the successful Bord and Pillar mining is selecting the optimum pillar size If the pillars are too small the mine will collapse If the pillars are too large then significant...

EVALUATION OF UNDERGROUND COAL PILLAR DESIGN - Know More

include opencast mining and underground mining The two common methods of underground mining include Longwall mining and Bord and Pillar method of mining The method mostly prevalent in the Indian underground mines is the Bord and Pillar method of mining because of ,...

Longwall Mining - Know More

At present, production by longwall mining accounts for a minor amount of total underground mining production with the majority coming from bord-and-pillar methods Since it is envisaged that longwall mining will require time to become established in India, bord-and-pillar methods will continue to be dominant in the foreseeable future Thus, it ....

Pillar Extraction using Continuous Miners Introduction , - Know More

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 However, there are still mines and occasions where longwall mining is not suitable eg...

NSW Mining Methods - Know More

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 to support the mine This method has been in ....

Gr5finalUnderground Mining Method Ppt Mining Economic , - Know More

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 Longwall Blasting galllery ,...

Bord and pillar applications on the platinum mine T - Know More

The T-cut mining method is basically a partial pillar extraction method The pillar 13 m x 13 m created by the bord and pillar development is being stoped only the UG2 reef out for 2 m from the roadways on all sides, to leave an effective pillar of 9 m x 9 m This method creates the required, higher extraction percentage and higher Run of...

MINING METHODS T - Know More

9 Blasting Gallery Method Conventional bord and pillar mining in thick seams is associated with very low percentage of extraction around 30 in a panel even under favourable conditions Extensive development of pillars carried out...

Toward Pillar Design to Prevent Collapse of Room - Know More

TOWARD PILLAR DESIGN TO PREVENT COLLAPSE OF ROOM-AND-PILLAR MINES R Karl Zipf, Jr Chief, Catastrophic Failure Detection and Prevention Branch , Traditional strength-based pillar design methods applicable to coal or hard-rock mines use a , Room-and-pillar mining ,...

Mining Funda Bord and Pillar method of Mining - Know More

Bord and pillar mining method comprises two phases ie DEVELOPMENT and DEPILLARING Sometimes both these phases proceeds simultaneously In development, pillars are formed by driving a network of galleries, of which one set is generally parallel to the dip and the other set is parallel to the strike cutting the former at right angl...

Bord and Pillar Methods Coal, Colliery and Mining Forum - Know More

Mining Methods and Geology Bord and Pillar Methods Mining Methods and Geology , Bord and Pillar Methods General chat about bord and pillar Threads and Posts Total Threads 5 Total Posts 79 This board has 1 moderator On This Board You cannot create threads...

Open Cut or Underground Mining - Know More

Oct 21, 2017 0183 32 Coal is the largest portion of underground mining It represents 60 percent of global coal production Besides coal, underground can be used to mine gold or copper In underground mining, there are two methods bord-and-pillar and longwall Bord-and-pillar Bord-and-pillar is the oldest mining method...

Pillar Strength and Design Methodology for Stone Mines - Know More

Pillar Strength and Design Methodology for Stone Mines Gabriel S Esterhuizen, Sr Research Engineer Dennis R Dolinar, Lead Research Engineer John L Ellenberger, Lead Research Scientist NIOSH-Pittsburgh Research Laboratory Pittsburgh, PA ABSTRACT Underground stone mines in the United States make use of the room-and-pillar method of mining...

Room and pillar mining - Know More

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...

Room and pillar mining - Know More

May 31, 2017 0183 32 Two main methods of extraction are used for underground coal mines in New South Wales longwall and bord-and-pillar extraction Bord-and-pillar extraction is the older of the methods,...

Longwall mining - Know More

The basic idea of longwall mining was developed in England in the late 17th century Miners undercut the coal along the width of the coal face, removing coal as it fell, and used wooden props to control the fall of the roof behind the face This was known as the Shropshire method of mining...

Board Pillar? Coal, Colliery and Mining Forum - Know More

Mar 24, 2013 0183 32 Bord 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 corner that is, probably ....

Design of Bord and Pillar method in coal mines - Know More

Feb 27, 2016 0183 32 This method is sometimes called room-and-pillar mining This can be better understand with the help of follwing fig 6 APPLICABILITY OF BORD AND PILLAR METHOD The Bord and Pillar method is adopted for working 1 A seam thicker than 15 m, 2 A seam free from stone or dirt bands...

Bord Pillar Method Mining Coal - Know More

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 Mining Method - Know More

Oct 22, 2014 0183 32 Room and Pillar Mining Method 1 Hassan Z Harraz hharraz2006 yahoo 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...

BORD AND PILLAR METHODpptx - Know More

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 Presentation By ,...

Evaluation of induced vertical stress during depillaring , - Know More

by Bord Pillar method, mostly by conventional hand section with a low productivity of about 087 tonnes per man shift Bord and pillar is also known as room and pillar mining system in which the mined material is extracted across a horizontal plane while leaving pillars of untouched material to support the overburden leaving open areas...

Principles of Room Pillar Mining - Know More

Sep 10, 2012 0183 32 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 ....

Surface Coal Mining Methods in Australia - Know More

Surface Coal Mining Methods in Australia Rudrajit Mitra and Serkan Saydam The School of Mining Engineering, The University of New So uth Wales, Sydney, Australia 1 Introduction , x Longwall mining, and x Bord and pillar mining also known as room and pillar mining x Surface mining operations x Open cut mining strip mining...