ppt for continuous mining in bord and pillar

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Coal Mining Methods

The "continuous" version of room-and pillar mining is the most common, representing more than half of all underground production. In this method, a continuous mining machine excavates the coal and loads it onto a conveyor or shuttle car in a single step. Despite the term "continuous.

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Bord & Pillar Method | Mining | Coal - Scribd

Dec 02, 2009· 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 .

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Bord-and-pillar mining in inclined orebodies

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.

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Mining - blogspot

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.

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Longwall Mining - an overview | ScienceDirect Topics

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 ...

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Room-and-pillar mining | coal mining | Britannica

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.

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Continuous miners - Mining & Rock Technology

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.

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Identifying Optimal Mining Sequences for Continuous .

Mining Sequences for Continuous Miners Dr. Joseph C. Hirschi Project Manager ... In room-and-pillar mining: ... Identifying Optimal Mining Sequences for Continuous Miner Joseph C. Hirschi Project Manager Illinois Clean Coal Institute 2012 Illinois Mining Institute .

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Bord-and-pillar mining explained | Illawarra Mercury

May 31, 2017· Pillars of coal are left behind to support the roof as the coal is cut away with a machine called a continuous miner. Bord-and-pillar mining is used in first workings of a deposit, and when ...

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PPT – Coal Mining PowerPoint presentation | free to ...

Continuous mining-(also called bord and pillar) is a 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 or "rooms" underground. Blast mining-is .

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Bord-and-pillar mining in inclined orebodies

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.

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PPT – Underground Mining PowerPoint presentation | free to ...

Guarantee stable and continuous funding for the next 10 years ; ... New Technology and Challenges for Underground Coal Mining | PowerPoint PPT presentation ... Forecast to 2022 - US Underground Mining Equipment Industry Information by Type of Mining (Longwall Extraction and Room & Pillar Extraction), by Application (Coal Mining, Metal Mining ...

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Pillar Extraction using Continuous Miners | Introduction ...

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 e.g.

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Bord and pillar mining – Coal and coal mining – Te Ara ...

Bord and pillar mining Next. 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.

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CONTINUOUS MINER – Mining Science and Technology

New, more powerful continuous miners are highly productive and are remotely controlled being designed for a variety of seams and mining conditions. 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.

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Definition of bord-and-pillar method - mindat glossary

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. The remainder of the coal is won by a retreating system, the cover being ...

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Room-and-pillar mining | coal mining | Britannica

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.

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MINING METHODS |authorSTREAM

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.

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Vijaya Raghavan*, Dr Syed Ariff**, Paul Prasanna Kumar***

3.1. Overall working of bord and pillar method of mining using Continuous Miner: The bord and pillar method of mining is the older and traditional method of underground coal mining. This method is sometimes called room-and-pillar mining. Coal is removed from the working faces as the rooms are advanced. Cross-cuts,

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN .

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 .

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(PDF) Success of Continuous Miner in Bord and Pillar Method

The modern continuous miner and the use of other trackless equipment like shuttle cars, roof bolting rigs and scoops have made the room and pillar mining method economically very attractive for ...

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Definition of bord-and-pillar method - mindat glossary

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. The remainder of the coal is won by a retreating system, the cover being ...

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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 ...

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Continuous miner cutting tools - mining.dev.ibp.

We offer a wide range of continuous miner cutting tools for bord and pillar mining that increases your productivity in the most demanding conditions. Extremely productive and reliable, they are used for full-scale production in bord-and-pillar...

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