Bord pillar gallery

Bord pillar gallery

DESIGN OF SUPPORT SYSTEM FOR BORD AND PILLAR …

DESIGN OF SUPPORT SYSTEM FOR BORD AND ... 2010 . 2 DESIGN OF SUPPORT SYSTEM FOR BORD AND PILLAR WORKINGS A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF BACHELOR OF TECHNOLOGY IN ... for the depth of 53m with a gallery width of 4.8 m and pillar size of 25 m.

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Selection of optimum combination of fans for bord and ...

methods like bord and pillar, longwall, continuous miner and blasting gallery. Underground coal mining in SCCL is currently operating at a maximum depth of 500 m and most of the operations are carried at 200 to 400 m depth. In SCCL most of the main fans are axial flow fans rated between 150 to …

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BRIEF BIODATA with seminars-investigations-projects- Dr ...

Research areas of interest include Design of support system and methods of mining: long wall/Bord & pillar/Blasting Gallery/Wide stall; Strata control, Caveability, EMP, mine closure management, Underground instrumentation and monitoring,numerical modelling , Fly ash and bottom ash management, transdisciplinary research applicationsto mining ...

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Mining Technology – OC & UG, Mining Methods, Mining ...

 · (c) Bord & Pillar Method (d) Blasting Gallery Method Q5. A road in a proper coal seam is called ? (a) Traveling road (b) Gallery (c) Drift (d) Haulage road Q6. The process that sends sand water mixture in UG coal depillaring district is called (a) Jigging operation (b) Granting separation operation (c) Stowing Method (d) Coal drawing operation Q7.

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Coal mining methodsCoal mining methods

Room (Bord)Room (Bord)--andand--pillar pillar (Continuous miner and shuttle car) 2222. WongawilliWongawilli method and break line method and break line ... gallery gallery (BG) (BG) methodmethodmethod for thick for thick seams seams usingusingusing …

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN …

National Institute of Technology Rourkela CERTIFICATE This is to certify that the thesis entitled “EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES” submitted by Sri Ram chandra Nayak, Roll No. 10605015 &

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Design of Bord and Pillar method in coal mines - SlideShare

 · The stage of formation of a network of roadways is known as development or first working. And these roadways are called BORD or GALLERY . 5. BASIC PRINCIPLE OF BORD AND PILLAR METHOD When the gallery are developed a solid block of coal is left sourrounded the gallery are known as PILLAR.

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Evaluation of induced vertical stress during depillaring ...

pillars are kept almost equal, while in Bord & Pillar, pillar size is much larger than bord (gallery). The room and pillar system is used in mining coal, iron and copper ores mainly when found as blanket sediments, stone and aggregates, talc, soda ash and potash. About 3000 million tonnes of coal is locked up in standing pillars (Dixit and Mishra

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MINING METHODS T

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

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bord and pillar mining

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

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underground mining bord and pillar

Bord & Pillar Method Mining Coal Mining. Gallery bord 2 Basic parameters of bord and pillar mining system 1 Pillar 3 the percentage of extraction during development is nearly 20% in deep mines and 35% in shallow mines 3 m thick are suitable for b/p mining method ...

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Bord and pillar working with LHD/SDL - SlideShare

 · Equipment selection for bord and pillar mining. Equipment selection for bord and pillar mining ... • Headings of 4.8 m width is driven • In a gallery auger holes are drilled in the middle of the face upto 2m depth and shot holes are drilled upto 1.8m depth. • P1 type permitted explosive with instantaneous type electric copper detonator is ...

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Bord-and-pillar mining in inclined orebodies - SAIMM

Bord-and-pillar mining has some favourable promises such as improving labour difficulties, lowering operating costs and providing safer working conditions. The success of mechanized bord-and-pillar mining in narrow tabular steep dipping orebodies will depend on the extent of the research and development efforts

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underground mining bord and pillar

Bord & Pillar Method Mining Coal Mining. Gallery bord 2 Basic parameters of bord and pillar mining system 1 Pillar 3 the percentage of extraction during development is nearly 20% in deep mines and 35% in shallow mines 3 m thick are suitable for b/p mining method ...

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL …

This is to certify that the thesis entitled “EVALUATION OF BORD AND PILLAR MINING SYSTEM IN MCL COAL MINES” submitted by Sri Ram chandra Nayak, Roll No. 10605015 & Sri Sangram keshari Dalai, Roll No. 10605027 in partial fulfillment of the requirements for the

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Coal pillar design procedures - MHSC

2 Executive Summary Examination of collapsed pillar cases outside of the empirical limits of Salamon and Munro’s in situ database has highlighted the need for additional parameters to be considered in the design of coal pillars. These include the influence of discontinuities, surrounding strata characteristics

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Glossary of Mining Terms - Coal Education

Glossary of Mining Terms : Glossary of Mining Terms ... Chain pillar - The pillar of coal left to protect the gangway or entry and the parallel airways. ... passage underground. A drift follows the vein, as distinguished from a crosscut that intersects it, or a level or gallery, which may do either.

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Mining Methods - Lithgow Environment Group

Longwall mining increases coal retrieval rates by up to 60% more than bord and pillar methods. The typical longwall panel can take a year to mine. When the coal panel is being mechanically cut, the strata above the advancing machine-cutter are propped up by …

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Method – Mining Science and Technology

Modern Pillar Extraction 0 Comment The Wongawilli system involves much larger blocks of up to 200 m wide. It consists of a 2 or 3 heading entry headings driven through the centre of the panels, splitting the panel into two smaller panels.

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Definition of bord-and-pillar - mindat.org glossary

Photo Search Photo Galleries New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery. Definition of bord-and-pillar. A method of working coal seams. First bords are driven, leaving supporting pillars of coal between. Next, cross drives connect the bords, leaving supporting coal as rectangular pillars.

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BRIEF BIODATA with seminars-investigations-projects- Dr ...

Research areas of interest include Design of support system and methods of mining: long wall/Bord & pillar/Blasting Gallery/Wide stall; Strata control, Caveability, EMP, mine closure management, Underground instrumentation and monitoring,numerical modelling , Fly ash and bottom ash management, transdisciplinary research applicationsto mining ...

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Logistic regression model for prediction of roof fall ...

In total, 128 roof fall accidents for the last few years from five underground coal mines in India having bord and pillar method of working are analyzed for this study. The results revealed that wider gallery width is more prone to major and serious accidents than narrower gallery width.

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bord and pillar mining method

bord and pillar coal mining lebhvbe Bord and pillar mining Coal and coal mining 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 Room and pillar mining A method of underground mining in which approximately half of the coal is .

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Bord-and-pillar mining explained | Illawarra Mercury

 · 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.

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Proactive Strategies for Prevention and Control of Fires ...

thick seams worked with bord and pillar mining methods is presented. A mine located in India which has a 22 year history of working a 10m thick coal seam with the blasting gallery (BG) technology for extraction of the pillars was selected for the study.

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Support Design during Depillaring Operation in Bord and ...

Bord and Pillar, depillaring panel, elasto – plastic model, three – dimensional numerical Simulation, full column grout rock bolts, instrumented rock bolt. 1. Introduction . ... gallery where the bolt has installed and less on the pillar because the focus is to interpret the

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Room and pillar

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).

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How is coal mined? - Quora

 · It is a Bord & Pillar method of mining for extraction of moderately thick coal seams (5 – 9m) where development is already made along the floor (development 3m height maximum) of the coal seam and rest of the coal is left in roof.Almost all procedures are normal mining as practiced in Bord & Pillar depillaring like drivage ofGallery/Splitting of Pillar, ring hole drilling by Jumbo drills ...

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Bord & Pillar Method | Mining | Coal - Scribd

.Basic parameters of bord and pillar mining system 1. Junction Calculation of percentage of extraction during development • If coal from the full seam thickness is extracted. Gallery (bord) 2. Pillar 3. the percentage of extraction during development is nearly 20% in deep mines and 35% in shallow mines.

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Support Design during Depillaring Operation in Bord and ...

Bord and Pillar, depillaring panel, elasto – plastic model, three – dimensional numerical Simulation, full column grout rock bolts, instrumented rock bolt. 1. Introduction . ... gallery where the bolt has installed and less on the pillar because the focus is to interpret the

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I wandered into Fused knowing nothing about fused glass and walked out with dreams of wonderful thin... gs to be made all due to enthusiasm and talent of Tony. I’ve seen and done a lot of glass fusing since but his imagination and art is still one of the best...you’ll count yourself lucky to be a part of his sharing :) See More

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Definition of bord-and-pillar method - mindat.org glossary

Photo Search Photo Galleries New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery. 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.

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Coal Production By Bord And Pillar India

bord pillar gallery - antiradareurope.eu Traduire cette page. Coal Production By Bord And Pillar India. In underground coal mines, bord and pillar is one of theTable: while in Bord & Pillar, pillar size is much larger than bord .

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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).

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Room and pillar

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).

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Stress Distribution on Blasting Gallery Barrier Pillar due ...

Stress Distribution on Blasting Gallery Barrier Pillar due to Goaf Formation During Extraction ... of thick seams by conventional bord and pillar method, the

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DESIGN OF SUPPORT SYSTEM FOR BORD AND PILLAR …

DESIGN OF SUPPORT SYSTEM FOR BORD AND PILLAR WORKINGS ... ―Design of support system for bord and pillar workings‖ submitted by Mr. Manoj Kumar Biswal in partial fulfillment of the requirement for ... for the depth of 53m with a gallery width of 4.8 m and pillar size of 25 m.

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