bord and pillar mining working photos



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Bord Pillar Method Mining Coal

Disadvantages of bord and pillar mining method Ventilation is sluggish at the working places as compared to L/W method because of multiple connections and large no of ventilation stoppings which provides sources of leakage The extraction losses are generally higher than in other methods of mining Work is carried on at a no of working places...

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University of Wollongong Research Online

DETAIL LAYOUT AND METHOD OF WORKING The mine there is being worked by Bord and Pillar method in which continuous miners are being used as the main equipment for extracting coal The Pillar size which is being kept for support of the overburden pressure is 35 m x 35 m 40 m x 40 m and 40 m x 35 m The depth of cover above the...

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EVALUATION OF UNDERGROUND COAL PILLAR DESIGN

21 Bord and Pillar working method 6 22 Pillar Failure 7 23 Effect of mining method on pillar strength 8 24 Basic principles of pillar design 8 25 Pillar Strength Formulas 15 26 Factor of Safety 20 27 Size of pillars 21 28 Laboratory Techniques 22 3...

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Room and Pillar Mining

The major partial mining method are strip pillar mining Wongawilli strip pillar mining room and pillar mining and thickness-limited extraction 1 Strip pillar mining Strip mining technology is an effective measure to reduce the overburden strata and surface movement and deformation and it is also one of the important measures in the system of Green Mining...

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Pillar design

Stresses in pillar boundary must be sufficiently low that mining conditions are acceptable with reasonable levels of support The following graph shows case histories from Canadian hard rock min If it is considered stable the factor of safety is greater than 14 and if it is considered failure factor of safety is less than 1 7...

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Wollongong Coal gets green light for

Dec 09 2020 0183 32 The IPC has granted Wollongong Coal an approval to extract up to 37 million tonnes of coal over five years using bord and pillar mining methods at Russell Vale...

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Design of Bord and Pillar method in coal mines

This method is sometimes called room-and-pillar mining This can be better understand with the help of follwing fig 6 APPLICABILITY OF BORD AND PILLAR METHOD The Bord and Pillar method is adopted for working 1 A seam thicker than 15 m 2 A seam free from stone or dirt bands...

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Bord and Pillar mining by continuous Miner in HINDI

Jul 29 2016 0183 32 Please watch Mines Act 1952 Video No 1 Committee With MCQ In HINDI https //youtube/watch v=USzxioNpomo - - - - - - Bord and pillar is...

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Google Photos

Google Photos is the home for all your photos and videos automatically organized and easy to share...

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Bord and Pillar Method of Working Coal Mining Coal

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...

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Room and pillar mining

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 overburdenCalculating the size shape and position of pillars is a complicated procedure and is an area of...

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Definition of bord

Photo Search Photo Galleries Search by Color New Photos Today New Photos Yesterday Members Photo Galleries Past Photo of the Day Gallery Mineral Photography Definition of bord-and-pillar working N of Eng A system of mining in which interlacing roadways are driven at right angles into the seam leaving small square or rectangular pillars of...

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Board Pillar Coal Colliery and Mining Forum

Apr 17 2015 0183 32 You should have joined in on the debate as it was not mentioned about a certain depth for Bord and Pillar but a mention by a Mining Engineer that at greater depth there was need for larger pillars with his link to the Coalbrook disaster in South Africa in 1960 Seen photo`s of similar work in French Coalmine`s but heavier timber than 2 to...

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What Is a Room and Pillar with picture

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 Room and pillar is the oldest type of mining technique Throughout history miners have used a random room and pillar mining strategy to extract minerals from the...

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PDF Underground Mining Methods Room and Pillar method

To minimise mining loses and also provide high safety conditions proper dimensioning of pillars using geomechanics must be considered 5 Figure 2 below illustrates typical pillar failure...

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Board Pillar Coal Colliery and Mining Forum

Aug 16 2013 0183 32 Plus if your working under cities/towns reservoirs and other sensitive areas Bord and Pillar is the only way to extract coal It does have drawbacks in that it is hard to ventilate you only get around 50 max extraction rat It s not all that long ago when all coal in the UK was extracted by Bord and Pillar...

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Underground Mining Methods and Equipment

13 Room-and-pillar Mining Room-and-pillar mining is suitable for flat or nearly horizontal tabular deposits If the ore bodies are moderately inclined gt 30 176 it is impractical to utilize tired mobile equipment resulting in reduced productivity If the competence of the hanging wall and/or the ore is...

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Digging deeper Mining methods explained Anglo American

The underground mining methods we use include room and pillar narrow vein stoping and large-scale mechanised mining Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them which are gradually cut away as the work proceeds We use this for mining coal...

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Definition of bord

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 caved after each unit has been worked The term bord-and-pillar is not used to any great extent in American mining literature but has a place in English...

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VENTILATION PLANNING LAYOUTS FOR LARGE OPENING

working environments Large room-and-pillar stone mining fundamentals The value per ton of ore for large room-and-pillar stone mines is typically low therefore productivity must be high Typical face areas are 122 m wide x 76 m high 40 ft wide by 25 ft high with 43 m 14 ft pulled with each blast Figure 1...

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Mining Weekly

Nonetheless he highlighted that South Africa did have mechanised mines but that they mostly used the bord-and-pillar mining method with low-profile mining technologies which were mostly...

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Bord and pillar methods it s advantage and disadvantage

Feb 20 2020 0183 32 Unit-6Chapter introduction to coal mining methodTopic classification of methods of working Bord and pillar methodsAdvantage of Bord and pillar methodsDis...

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Mining subsidence and its effect on the environment some

Oct 21 1999 0183 32 The impact of mining subsidence on the environment can occasionally be very catastrophic destroying property and even leading to the loss of life Usually however such subsidence gives rise to varying degrees of structural damage that can range from slight to very severe Different types of mineral deposits have been mined in different ways and this determines the nature of the...

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Board Pillar

Sep 15 2015 0183 32 The mining progresses from top to bottom in mining panels 2 Post-pillar mining Applies to inclined deposits with dip between 20o and 55o Have large vertical dimension and filling the mined space suffers backfilling The filler maintains the stable rock minimizes columns and serves as a working platform for the next slice 3...

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Surface Coal Mining Methods in Australia

x Bord and pillar mining also known as room and pillar mining x Surface mining operations x Open cut mining strip mining o Using draglines o Using truck and shovels and o Using a combination of above integrated mining systems Draglines work in strips which are typically 40 to 90 m wide and few kilometres long and...

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will no longer build tracked drills bord and pillar

Searching for the latest safety news and technologies in the mining sector Read the latest Safe to Work magazine - RSS Facebook Twitter Google Follow bord and pillar mining machinery August...

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Pillar design incoalmines

productivity inbordand-pillar mining tional bord-and-pillar mining methods Thealternatives are opencast methods where the coal seams are rela-tively shallow andthick andpanel andlongwall mining methods fordeeper coalseams Thearea ofapplication ofopencast methods islargely determined bythe size ofthe coal deposit and the coal-to-waste ratio For...

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Underground mining of thick coal seams

Nov 01 2015 0183 32 Both routes of conventional mining methods ie longwall and bord and pillar are used to win the roof coal band during final extraction Due to different geological and techno-economical reasons longwall route to win the roof coal band is popular in China while the Indian coal mining industry is mainly practicing B P route for winning the...

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Bord And Pillar Mining Working Photos

towards high productivity under a claystone roof - underground COAL Feb 15 2001 their history to find an economic mining method under these initially a Bord and Pillar operation and when the reserves of the inspector commented that the bord was about 22 ft 67m wide and the working height of the coal was to fret and consequent rib and roof falls occurred see Photos 1 2...

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Design of Bord and Pillar method in coal mines

Feb 27 2016 0183 32 This method is sometimes called room-and-pillar mining This can be better understand with the help of follwing fig 6 APPLICABILITY OF BORD AND PILLAR METHOD The Bord and Pillar method is adopted for working 1 A seam thicker than 15 m 2 A seam free from stone or dirt bands...

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