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Ppt For Continuous Mining In Bord And Pillar

CONTINUOUS MINERS - SlideShare

CONTINUOUS MINERS - SlideShare

Aug 03, 2014 Nirbhay Kumar Sinha Roll-2013MT0130 Branch-Mining Machinery Engg. ISM Dhanbad. 2. INTRODUCTION : Continuous mineris a machine used for cutting and loading of coal used in underground Board and Pillar mining operation. The JOY continuous minerproduct line has been developed to meet the high productivity requirements of today's underground mining industry

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Board & Pillar - SlideShare

Board & Pillar - SlideShare

Sep 15, 2015 Board & Pillar. 1. Step mining It is an adaptation for the case where the dip of the ore body is too big (15o to 30o) to use equipment on tires at the same time that its thickness is relatively small (2 - 5 m). A special orientation of transit and stops galleries creates areas with horizontal floor, allowing the use of equipment on tires

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining. The success of Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too large, then the extraction ratio decrease leading to less production and profitability and if

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Bord-and-pillar mining explained | Illawarra Mercury

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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(PDF) Underground Mining Methods: Room and Pillar method

(PDF) Underground Mining Methods: Room and Pillar method

French Lorraine iron ore accounts for 94% of the total production, while 58 mines in Lorraine are mined by the room-and-pillar method. In the United States, the method is used by 65 percent of

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EVALUATION OF UNDERGROUND COAL PILLAR DESIGN

EVALUATION OF UNDERGROUND COAL PILLAR DESIGN

2.1. Bord and Pillar working method 6 2.2. Pillar Failure 7 2.3. Effect of mining method on pillar strength 8 2.4. Basic principles of pillar design 8 2.5. Pillar Strength Formulas 15 2.6. Factor of Safety 20 2.7. Size of pillars 21 2.8. Laboratory Techniques 22 3

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Identifying Optimal Mining Sequences for Continuous

Identifying Optimal Mining Sequences for Continuous

Mining Sequences for Continuous Miners Dr. Joseph C. Hirschi Project Manager ... Room-and-pillar mining has obvious geometric constraints, i.e. Cut #5 cannot be mined until Cut #1 and Cut #3 have been mined. ... PowerPoint Presentation Author: Kathy Bendler

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Bord & Pillar Method | PDF | Mining | Coal

Bord & Pillar Method | PDF | Mining | Coal

Applicability of bord and pillar mining method Following points should be considered for b/p mining Gradient of the seam: Flat seams are more suitable. Thickness of the seam: Seam thicker than 1.5 m and preferably 1.8-3 m thick are suitable for b/p mining method. Presence of stone and dirt bands: Seam should be free from stone and dirt bands

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CONTINUOUS MINER – Mining Science and Technology

CONTINUOUS MINER – Mining Science and Technology

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 left standing to help support the roof. Roof bolts, typically four to six feet long steel bolts, are inserted into holes bored into the roof to bind the strata together support the roof

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Coal Mining - basics

Coal Mining - basics

heading using a continuous miner and highwall miner continuous haulage Reliably excavate to 350-500m from the highwall Can double pass in thicker seams leaving a septum Recovery 45-60% with dilution similar to underground mining Must have strong strata Approximately 1.0Mtpa. Punch Mining Longwall or bord and pillar mining with

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EVALUATION OF BORD AND PILLAR MINING SYSTEM

EVALUATION OF BORD AND PILLAR MINING SYSTEM

Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining. The success of Bord and Pillar mining is selecting the optimum pillar size. If the pillars are too large, then the extraction ratio decrease leading to less production and profitability and if

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Hard-rock room and pillar mining best practice

Hard-rock room and pillar mining best practice

definition; however, room and pillar mining as practised in the narrow reef hard rock mines in Southern Africa is not so simple. In recognition of the complexity of hard-rock room and pillar mining, the mining industry sponsors of the Centre for Mechanized Mining Systems at Wits University requested that the Centre design and facilitate a Best

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typical bord and pillar mine plan ppt - BINQ Mining

typical bord and pillar mine plan ppt - BINQ Mining

Mar 14, 2013 Mar 14, 2013 Bord-and-pillar mining in inclined orebodies. during underground bord-and-pillar mine visits. Three underground mine visits were made, RPM …. Plan area 257478 m2 Average dip 18 …. More detailed. bord and pillar mining. bord and pillar mining india. room and pillar mining. room and pillar mining method

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(PDF) Success of Continuous Miner in Bord and Pillar

(PDF) Success of Continuous Miner in Bord and Pillar

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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MINE SUBSIDENCE-Rev 1 | Mining | Fault (Geology)

MINE SUBSIDENCE-Rev 1 | Mining | Fault (Geology)

Mining Method The extent and magnitude of subsidence is limited by techniques such as bord-and-pillar mining, which limits the extent of extraction. The timing and extent of subsidence in bordand-pillar mines is not predictable, and eventual collapse of pillars in bord-and-pillar mining may lead to trenching or sagging of the surface, with

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Underground Mining Methods and Equipment

Underground Mining Methods and Equipment

methods and brief explanations of the techniques of room-and-pillar mining, sublevel stoping, cut-and-fill, longwall mining, sublevel caving, and block caving. The second section describes underground mining equipment, with particular focus on excavation machinery such as boomheaders, coal cutters, continuous miners and shearers. 1

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bord and pillar mining

bord and pillar mining

bord and pillar coal mining ppt – Grinding … Room and pillar – Wikipedia, the free encyclopedia Room and pillar (also called bord and pillar) is a mining system… Get Price; bord and pillar mining india – Grinding Mill … Bord and pillar mining Te Ara Encyclopedia of New Zealand,This diagram shows the traditional method of bord and

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THE MODERN WONGAWILLI METHOD – Mining Science

THE MODERN WONGAWILLI METHOD – Mining Science

THE MODERN WONGAWILLI METHOD. 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. The panel can be up to 1000 m long. Lifting of the fenders is carried out to the left and right of the split

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