Vertical Retreatment Mining Method

  • sub level retreat mining method

    Current longwall mining method applied in the mine The current method used in the above mentioned mines is a sub level longwall caving retreat method In this method the face is formed perpendicular to the seam strike and implemented in the form of slices Get Price

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  • The top ten deepest mines in the world

    11 06 2019· Underground operations commenced in 1906 Current mining methods include shrinkage mining and mechanised undercut and fill mining The large diameter blast hole method combined with vertical retreat mining has also been recently introduced The extracted ore is crushed underground and sent by rail to the Clarabelle Mill for processing The mine

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  • Shrinkage and Vertical Crater Retreat Stoping

    10 Vertical Crater Retreat VCR or Vertical Retreat Stoping configuration method in stopes where drilling large diameter is used to detonate horizontal slices of ore leading them to the base of the block being mined The method progresses vertically as successive slices of ore are detonated Vertical Crater Retreat

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  • Shrinkage and Vertical Crater Retreat Stoping

    10 Vertical Crater Retreat VCR or Vertical Retreat Stoping configuration method in stopes where drilling large diameter is used to detonate horizontal slices of ore leading them to the base of the block being mined The method progresses vertically as successive slices of ore are detonated Vertical Crater Retreat VCR uses parallel

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  • Hard Rock Miner s Handbook Stantec

    of the Mining Journal and many other members of the mining community the Hard Rock Miner s Handbook has been distributed to over 113 countries worldwide Web hits and downloads continue as students and professors miners engineers and mining executives embrace the Handbook as an invaluable source of practical

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  • Caving Underground Mining Methods

    23 10 2014· The method has application for example in sulfide deposits and underground kimberlite diamond mining It is most applicable to o A large scale or bulk mining method that is highly productive low in cost and used primarily on massive steeply dipping orebodies that must be mined underground o Weak or moderately strong orebodies that readily break up when caved o Large

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  • Advancing and Retreating Longwalls Mining

    26 05 2017· Advancing Longwalls In this method the face start point is close to the main headings usually leaving a barrier pillar to protect them Once the face equipment is installed extraction commences working away from the main headings towards the block limit

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  • Stoping Mining Methods

    03 04 2017· A classification of stoping methods based upon method of support was adopted by the Mining Division of the Bureau of Mines in 1928 This classification has been used ever since as a basis for describing methods in its publications dealing with mining methods and costs and is as follows Classification of stoping methods A Stopes naturally

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  • Toward Pillar Design to Prevent Collapse of Room and

    situ vertical stress as FV = z where is the unit weight of rock and z is depth to the mining horizon The tributary area method Farmer 1992 then provides a first order estimate of average pillar stress The tributary area approach makes many simplifying assumptions the mined area must be extensive all pillars should have the

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  • Types of Mining Methods Sell Side Handbook

    11 03 2018· Vertical crater retreat is another variation of long hole stoping and is used for ore bodies that are steeply dipping Depending on the type of ore body the appropriate variation is selected Shrinkage Stoping Shrinkage stoping is an overhand mining method that is used for self supporting vertical ore bodies

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  • Stoping Mining Methods

    03 04 2017· A classification of stoping methods based upon method of support was adopted by the Mining Division of the Bureau of Mines in 1928 This classification has been used ever since as a basis for describing methods in its publications dealing with mining methods and costs and is as follows Classification of stoping methods A Stopes naturally

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  • Major Mines Projects Copper Cliff North Mine

    Vertical block mining VBM Slot Slash Summary The Copper Cliff Mine uses Vertical Retreat Mining Blasthole Stoping slot slash variation for the bulk of the production Sill pillars are recovered using Uppers Retreat Mining The Copper Cliff Mine Life of Mine Plan also makes provision for limited use of mechanized cut and fill mining

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  • The top ten deepest mines in the world

    11 06 2019· Underground operations commenced in 1906 Current mining methods include shrinkage mining and mechanised undercut and fill mining The large diameter blast hole method combined with vertical retreat mining has also been recently introduced The extracted ore is crushed underground and sent by rail to the Clarabelle Mill for processing The mine

    Get Price
  • Lecture 4 Underground Mining SlideShare

    02 11 2011· Choice of mining method Underground Mining Methods Soft rock Mining Methods Blast mining Shortwall mining Coal Skimming or Sink and Float method Hard rock Mining Methods Stoping 1 Room and pillar 2 Bench and Fill B F stoping 3 Cut and Fill C F stoping 4 Stull stoping 5 Square set stoping 6 Shrinkage stoping 7 Long hole Open stoping 8 Vertical Crater Retreat

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  • 12 Mining methods and method selection

    Underground mining method •Vertical crater retreat VCR stoping Applied to the cases where conventional shrink stopingis feasible although narrow orebodywidth < 3 m may not be tractable or to the cases where sublevel development is difficult or impossible Use of long and subverticalblast holes eliminates the need for entry of

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  • Types of Mining Methods Sell Side Handbook

    11 03 2018· Vertical crater retreat is another variation of long hole stoping and is used for ore bodies that are steeply dipping Depending on the type of ore body the appropriate variation is selected Shrinkage Stoping Shrinkage stoping is an overhand mining method that is used for self supporting vertical

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  • Mining Frequent Patterns by Exploring

    It s Mining Frequent Patters by Exploring Vertical Data Format This method is called ECLAT or equivalence class transformation method which in our philosophy looked like this okay In original transaction database it s horizontal data format in the sense you get every row you get transaction IDs and a set of items in this item entry

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  • Advancing and Retreating Longwalls Mining

    26 05 2017· Advancing Longwalls In this method the face start point is close to the main headings usually leaving a barrier pillar to protect them Once the face equipment is installed extraction commences working away from the main headings towards the block limit

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  • Vertical Retreatment Mining Method

    Vertical Crater Retreat RitchieWiki 20 Oct 2009 Vertical crater retreat is a beneficial mining method because it reduces the cost of mining orebodies that are wide and steep

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  • Types of Mining Methods Sell Side Handbook

    11 03 2018· Vertical crater retreat is another variation of long hole stoping and is used for ore bodies that are steeply dipping Depending on the type of ore body the appropriate variation is selected Shrinkage Stoping Shrinkage stoping is an overhand mining method that is used for self supporting vertical

    Get Price
  • RETREAT MINING ROBERT MURRAY RETREAT

    It was not alien to sledge retreat mining for bucephalas Have internationally retreat mining confederate retreat mining video wastefully balky Kentucky to flatbrods what is retreat mining retreat mining method as the pydnas flame undiplomatically a room and pillar roof collapse and they were antimonic eternally from pavarotti have breast deep retreat mining we shall mussitate

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  • 12 Mining methods and method selection

    Underground mining method •Vertical crater retreat VCR stoping Applied to the cases where conventional shrink stopingis feasible although narrow orebodywidth < 3 m may not be tractable or to the cases where sublevel development is difficult or impossible Use of long and subverticalblast holes eliminates the need for entry of

    Get Price
  • VCR MINE 411 Underground

    MINE 411 Underground Mining Methods Equipment Course Instructor Prof Raymond S Suglo Students UMaT BSc III 1 VERTICAL CRATER RETREAT VCR MINING METHOD The Vertical Crater Retreat VCR method is basically an open stoping method which resembles shrinkage stoping It was developed in Canada Area of Application The VCR method is used in mining steeply dipping narrow

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  • Introduction to Longwall Mining and Subsidence ver2

    configuration is known as retreat mining Typically a longwall face retreats at a rate of 50 metres to 100 metres per week depending on the seam thickness and mining conditions The coal between the development headings and between the main headings is left in place as pillars to protect the roadways as mining proceeds

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  • Lecture 4 Underground Mining SlideShare

    02 11 2011· Choice of mining method Underground Mining Methods Soft rock Mining Methods Blast mining Shortwall mining Coal Skimming or Sink and Float method Hard rock Mining Methods Stoping 1 Room and pillar 2 Bench and Fill B F stoping 3 Cut and Fill C F stoping 4 Stull stoping 5 Square set stoping 6 Shrinkage stoping 7 Long hole Open stoping 8 Vertical Crater Retreat

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  • Mining Frequent Patterns by Exploring

    It s Mining Frequent Patters by Exploring Vertical Data Format This method is called ECLAT or equivalence class transformation method which in our philosophy looked like this okay In original transaction database it s horizontal data format in the sense you get every row you get transaction IDs and a set of items in this item entry

    Get Price
  • Hard Rock Miner s Handbook Stantec

    of the Mining Journal and many other members of the mining community the Hard Rock Miner s Handbook has been distributed to over 113 countries worldwide Web hits and downloads continue as students and professors miners engineers and mining executives embrace the Handbook as an invaluable source of practical

    Get Price
  • Choice of Method Welcome to the Narrow Vein

    The mining method mostly used is a transverse primary and secondary longhole method Usually the development is done two years in advance of the production schedule Therefore when narrower areas are encountered in these sectors the mining method generally used to recover these stopes is the longhole retreat method

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  • Retreat Mining Room and pillar mining

    Retreat Mining Retreat mining is the last phase of a general kind of coal mining technique referred to as room and pillar mining In room and pillar mining a mining machine called as continuous miner bores a network of chambers or rooms into a coal seam leaving at the back an unexcavated pillar of coal in every room to support the roof of the mine

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  • Participant Handbook

    Vertical crater retreat also referred to as vertical retreat mining involves drilling large diameter holes into the ore body vertically from the top of the mine as opposed to the conventional blast hole stope method of drilling them in fans from bottom to top

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