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Machinery Breakdowns In Bord And Pillar Mining

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Bord and pillar mining

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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Bord and pillar applications on the platinum mine T

Frank shaft is mining both Merensky reef and UG2 reef The Merensky orebody is almost depleted and this was the reason for starting to mine the UG2 ore reserves It was decided to mine the UG2 orebody with trackless equipment using a bord and pillar mining method Frank shaft has been mining the UG2 orebody for nearly 5 years

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EXECUTIVE SUMMARY REPORT

Corporate mining activity in Katanga began in 1906 with the formation of Union Miniere du Haut Katanga (UMHK) In 1967 following national independence the operations of UMHK were nationalized and incorporated as La Gnrale des Carrires et des Mines (Gcamines) At its

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NSW Mining Methods

Underground mining accounts for 60% of world coal production but is less common in NSW making up around 35% of raw coal production This method is also used to mine metallic minerals like gold and copper The two main types of underground mining in NSW are bord-and-pillar and longwall mining

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Mineral resource and reserve statement

Mineral resource and reserve statement Resources and reserves reflected in this statement are reported on a Northam attributable basis and include those which are either from properties that are wholly owned by Northam or its wholly owned subsidiaries or joint

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Key success elements of coal pillar extraction in New

Key success elements of coal pillar extraction in New South Wales areas in New South Wales the practice of hydrofracture has been applied Hydrofracture is the application of high pressure water injection or blasting in boreholes preceding the line of mining to induce breaking of the massive strata to encourage early caving

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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 offer conical or radial configurations

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Bord

mechanized bord-and-pillar mining layout for a given piece of ground (Vlakpoort and Moddergat) using a given selection of machines This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18 with adverse strike and dip changes Two bord-and-pillar layouts were designed for this area

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Surface and Underground Mining Methods

Dec 15 2016Room/Bord and Pillar Mining Longwall Mining Shortwall Mining There exist special type of mining methods depending on the specifications of the site which are Plowing mining in thin seams High pressure water jet mining Blasting gallery method for thick seams Longwall top coal caving method in thick seams Multislicing mining method in thick seams

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Mining

Mining - Mining - Underground mining When any ore body lies a considerable distance below the surface the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive and underground techniques must be considered Counting against underground mining are the costs which for each ton of material mined are much higher underground than on the

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Research Report on the Coal Pillar Recovery under Deep

Additional specific recommendations to limit the risk of violent coal bursts during retreat mining operations are At depths exceeding 1 000 ft retreat mining should not be conducted without properly designed barrier pillars At depths exceeding 1 000 ft pillar splitting should not be conducted on the pillar line

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Bord Pillar Method

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 mines

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OFFICE OF THE STATE CORONER FINDINGS OF INQUEST

incident Walter Mining was conducting the place change mining in North 2 Bord and Pillar Panel It was in this area of the mine that the incident occurred 14 Mr Allan an experienced miner who gave evidence considered the particular configuration of this board and pillar mine is standard and very typical for Australia The mains development

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Construction

Construction of Annulus The objective here however is not the removal of the raw materials (as in mining) or the removal of the stone (as in tunneling) but rather the preservation of the rocks In any event tunnels or shafts must be installed in which vehicles and people can be transported to the bottom of the piston so that they can setup the technical equipment

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Where can I get information about the various mining

You can visit - Study Material | Mine Portal They have uploaded enough study notes which can be beneficial for every discipline candidate at least about Coal Mining and Coal India Beside this you can read few interview stories over there And be r

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Room

In coal mining Mining methods classified into four distinct categories room-and-pillar longwall shortwall and thick-seam Read More open-stoping methods In stoping A common open-stoping method is room-and-pillar mining in which pillars of ore are left standing to support the rock over a flat-lying ore body Read More

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Bord and pillar working with LHD/SDL

Jun 10 2015Bord and pillar working with LHD/SDL SDL SPECIFICATION MODEL BUCKET CAPACITY OPERATING WEIGHT ELECTRIC MOTOR GROUNG PRESSURE TRAVELLING SPEED EIMCO ELECON 625 2 032 tons 8 9 tons 48 5 KW 0 94 Kg/cm2 3 0 kmph M412 1 35 tons 8 5-9 tons 55 KW 0 9 kg/cm2 2 6 kmph EIMCO ELECON 611 0 9 tons 9 tons 48 KW 0 96 kg/cm2 3 0 kmph 10

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Development Face Ventilation ~ Mining Engineering Science

May 26 2017This system works quite well and is still in use in some mines where ventilation is not too arduous (e g bord and pillar mining) The brattice wall tends to be leaky and it is difficult to get good flow at the face for distances over 80m The brattice also restricts the working width or

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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

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ESTIMATION OF CAPITAL COSTS FOR ESTABLISHING COAL

ESTIMATION OF CAPITAL COSTS FOR ESTABLISHING COAL MINES IN SOUTH AFRICA Underground coal mining 9 1 4 1 Room and pillar 9 1 4 2 Longwall 12 1 5 South African coal mining context 13 Capacity versus cost for bord and pillar type operations 55 xii LIST OF ABBREVIATIONS

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will no longer build tracked drills bord and pillar

will no longer build tracked drills bord and pillar mining machinery As part of this product discontinuation decision will also lay off 155 workers at its Houston Pennsylvania facility where room and pillar products are produced and 40 workers in

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The role of the rock mechanics engineer in the mining industry

The responsibilities of the rock mechanics engineer in the mining industry and the available computer programs and their applications Over the past decade (1963 – 1973) there has been a change of emphasis in the field of rock mechanics from a purely theoretical approach to the practical solution of problems which occur in the mining industry

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Joy

Joy equipment is used in all areas of underground mining including energy minerals such as coal industrial minerals such as salt and hard rock minerals such as copper and iron Joy equipment is known in the industry as the leading brand of underground mining equipment and is specifically lauded for high reliability and producing the lowest cost per ton

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Major Mines Projects

Opencast techniques are currently employed to mine the DCM reserves 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 0 5 m are considered during mining operations

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MINING METHODS T

While opencast operations are now fully mechanized employing large capacity earth moving equipment introduction of machinery in underground workings has been gradual In conventional bord and pillar workings coal loading and transport have been mechanized eliminating human labour and drudgery to a

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Subsidence from Underground Mining Environmental

EFFECTS ON SURFACE STRUCTURES The effects of subsidence on surface structures are controlled to a large extent by the mining method The long-term delayed nature of subsi dence over room-and-pillar mines can make the task of repair and maintenance of surface facilities intermittent and not

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UNDERGROUND MINING

Room Pillar operations — cutting coal and moving it out of the mine for processing But it's the roof bolter that makes it possible for them to do their jobs Using a series of powerful bolts these machines create self-supporting roofs for Room Pillar mining operations ROOF

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The Oil Drum

This is the next in the series of Tech Talks on Coal Mining and I'm now going to move more into more recent mining rather than dealing with the historic background of the recent past Specifically I am going to describe how the "Bord and Pillar" mining of the olden days transitioned into the much more mechanized mining method known as "Room and Pillar" mining – the most popular

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Hard Rock Miner's Handbook

Hard Rock Miner's Handbook is a work of the heart Jack—whose 40+ year career spanned engineering construction and operation of mining projects worldwide—conceived of and wrote the first edition of the Handbook published in June 2000 to assist miners and engineers in the difficult world of hard rock mining It was his

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What Is a Room and Pillar? (with picture)

This allows miners to extract materials like coal or metal from the soil removed out of the rooms yet leaves the pillars to support the ground above This mining technique works best for materials located along the same horizontal plane or stratum Room and pillar mining may also be known as bord and pillar mining in some areas

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Room and Pillar Mining

At the current Carlisle Mine and developing Bulldog Mine Sunrise Coal is using the room and pillar mining method At the developing mine in Clay City Indiana coal is close to the surface and will require surface mining Room and pillar mining is a non-subsidence plan for

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Longwall Mining

Problems such as poor supervision machinery breakdowns or rook control have disastrous production consequences Dust and gas difficult to control because of high production rates Limited flow area down longwall face limits air quantities for dilution Conveyor systems too small -

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