Room and pillar mining - Wikipedia
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.
Bord-and-pillar mining explained | Illawarra …
Bord-and-pillar mining is used in first workings of a deposit, and when irregularly shaped deposits, or sensitive environmental conditions, call for a lighter touch.
Bord and pillar mining – Coal and coal mining – Te …
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 ...
Bord-and-pillar mining in inclined orebodies
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
Bord and Pillar mining by continuous Miner in …
29-7-2016 · Bord and pillar is an underground mining method for extracting coal from belowground of earth. Various machinery combinations are used for extracting.
Bord and Pillar Method of Working | Coal Mining | …
This method is sometimes called room-and-pillar mining. It is commonly used for flat or gently dipping bedded ores or coal seams. Pillars are left in place in a regular pattern while the rooms are mined out. In many Bord and Pillar mines that are nearing closure, the pillars are taken out, starting at the farthest point from the mine haulage exit, re treating, and letting the roof come down ...
Bord-and-pillar ops approved for Dartbrook; …
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".
Room-and-pillar mining | coal mining | Britannica
26-7-2020 · 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…
Can bord and pillar fly in Australia? - …
CW: The primary benefit of bord and pillar mining is that for an equivalent production the capital cost of a bord and pillar operation would be 45% to 65% of that of a longwall mine. The operating costs may be 30% to 60% more than a longwall, but the risks are significantly less and production variances are very low compared to longwall.
Design of Bord and Pillar method in coal mines
27-2-2016 · 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 predominates are Australia, The USA and South Africa.
Bord-and-pillar | Definition of Bord-and-pillar by …
Bord-and-pillar definition is - of or relating to a system of coal mining in which tunnels are driven in a checkerboard pattern having massive square pillars between them …
EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL …
mining and its development correlate closely with cultural progress. Mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials. One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining.
Bord and Pillar Method, Mine Ventilation, by OcS …
7-5-2013 · % of extraction- board & pillar mining- part I - Duration: 18:01. Mining Technical 13,056 views. 18:01. Slow Cooling of Hypoeutectoid Steels, animation by OcS (www.octavesim.com) ...
Bord and Pillar mining - liming Mining
Our cutting tools for bord and pillar mining fit either continuous miners or roadheader machines. They feature a hardened steel body/shank fitted with a wear and impact resistant tungsten carbide tip. Depending on the application, we also...
Bord and pillar applications on the platinum mine: T-cut ...
The mining layout is exactly the same as that of the normal bord and pillar layout (see Figure 3). The bords are 4 m wide and pillar sizes are 13 m x 13 m, thus creating centres of 17 m. The stopping width in the development phase is 1.8 m (0.2 m hanging wall, 0.8 m UG2 reef and 0.8 m footwall). The pillar that is created is then stoped out ...
Board & Pillar? | Coal, Colliery and Mining Forum.
24-3-2013 · 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 ...
Bord and Pillar mining
Our cutting tools for bord and pillar mining fit either continuous miners or roadheader machines. They feature a hardened steel body/shank fitted with a wear and impact resistant tungsten carbide tip. Depending on the application, we also...
Mining Funda: Bord and Pillar method of Mining
Bord and pillar mining method comprises two phases i.e 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 angles.