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Vertical crater retreat mining method

Baselining Vertical Retreat Mining as a Mining Method Baselining a Mining Method Vertical Crater Retreat VRM Baselining a process is not an easy task One must get down on the ground floorand document process structure from start to finish A convenient method for representing a process and all of its ponents is simple flowcharting

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  • 12 Mining Methods And Method Selection

    124 Underground mining method Vertical crater retreat VCR stopingApplied 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 impossibleUse of long and subverticalblast holes eliminates the need for entry of

  • 302 A Framework For Stope Sequence Optimization

    any methods of extracting ore in an underground mining context exist The stope sequencing methods developed here are applicable to steeply dipping ore bodies that can be segregated into panels of stopes The mining method used possibly sublevel stoping or vertical crater retreat

  • A New Model For Mining Method T Selection Of Miner

    vertical crater retreat mining VCR strip mining and novel extraction methods such as hydraulic mining and borehole mining Moreover underground methods such as longwall may be performed in the retreat or advance mode and the ground control may be performed by caving or filling Therefore choices in the mining method selection process are

  • Abstract USGS

    VERTICAL CRATER RETREAT MINE MODEL The VCR mining method is used on vertical or steeply dipping ore bodies under similar conditions for sublevel stoping and shrinkage stoping Downthehole drills are used for production with small jumbos used for drift development LHDs move the ore

  • Ajor Mines Projects Morro Agudo Mine

    he proposed mine plan envisages a bulk mining operation with two mining methods vertical retreat mining VRM and sublevel open stoping SLOS Uncemented waste rock backfill will be employed to fill the VRM stopes to provide hanging wall support to reduce mining dilution

  • Ajor Mines Projects Vazante Mine

    ining Methods Sublevel stoping Vertical Crater Retreat Summary The Vazante mine is an underground and open pit mine located about seven kilometers from the municipality of Vazante in the state of Minas Gerais Brazil

  • ASTERS THESIS

    at 25 years The mining method used for production at Mindola Shaft is a variation of sublevel stoping known as the Vertical Crater Retreat VCR method The ore body in Mindola is on average 12 meters wide with dip varying from 56to 72the ore is extracted in stopes and backfilling is employed

  • Baselining Vertical Retreat Mining As A Mining Met

    Baselining Vertical Retreat Mining as a Mining Method Baselining a Mining Method Vertical Crater Retreat VRM Baselining a process is not an easy task One must get down on the ground floorand document process structure from start to finish A convenient method for representing a process and all of its ponents is simple flowcharting

  • Definition Of Vertical Crater Retreat Glossary

    Definition of vertical crater retreat i A blasting method employed in underground sublevel mining Initially a vertical slot extending across the width of the stope is mined The remaining portion of the stope is then blasted by section into the vertical slot following sublevel procedures

  • Design And Application Of Sublevel Stoping Methods

    his course refers to the generic mining method of sublevel stoping The most monly used sublevel stoping mining methods are sublevel open stoping longhole open stoping or blasthole stoping and vertical crater retreat VCR Variations of this method include vein Alimak mining transverse stoping Avoca and longitudinal mining

  • Echniques In Underground Mining ILO Encyclopaedia

    Vertical crater retreat mining Like sublevel stoping and shrinkage stoping vertical crater retreat VCR mining is applicable to mineralization in steeply dipping strata However it uses a different blasting technique breaking the rock with heavy concentrated charges placed in holes craterswith very large diameter about 165 mm

  • Geotechnical Aspects Of Vertical Crater Mining Met

    Vertical Crater Retreat is pared to other open stoping methods Various geotechnical factors have been considered including the effects of stress concentration jointing dynamic stresses superimposed by blasting vibrations amount of development required and shrinkage draw All these factors favour a VCR method in a deep mining environment

  • He Blasting Test And Blasting Vibration Monitoring

    In order to ensure the safety of the residence and the underground tunnel cavern within the mobile belt of the underground mining the Luohe iron mine did the blasting test on the vertical crater retreat mining method and blasting vibration monitoring The blasting experiments use mon emulsified oil explosives and nonelectric initiation system

  • Ining Methods Flashcards Quizlet

    Start studying Mining Methods Learn vocabulary terms and more with flashcards games and other study tools Crater retreat stoping a method of stope mining that allows for extraction of vertical deposits surrounded by inpetent rock mass rock that cannot support itself

  • Lecture 4 Underground Mining

    Nov 02 2011HZ Harraz Presentation Mining Methods 29 30 7 Vertical Crater Retreat VCR Stoping Vertical longholes are drilled from drives developed in the ore between two levels Ore is then blasted using a charge that occupies a relatively short length of the hole some distance from the bottom face The method has a low explosive consumption The

  • Longitudinal Retreat Mining Method

    longitudinal retreat mining method samatourfr vertical crater retreat mining method Vertical Crater Retreat Stoping as Applied at the Homestake 28 Jul 2012 Therefore the feasibility of applying the VCR stoping method at the Homestake Mine was explored Vertical Crater Retreat stoping is a recent innovation in largescale underground mining

  • National Exams May 2015 09MMPA2 Underground

    Discuss the geology geometry and rock strength issues applicable to the vertical crater retreat mining method 3 marks Underground Mining Methods and Design 09MmpA2 May 2015 Page 3 of 13 Question 13 7 marks answer pulsory 13 General mine ventilation question 7 marks

  • Numerical Modelling Approach For Mine Backfill

    including mining sequence and blastinduced vibrations from production blasting Sublevel stoping mining methods with delayed backll are extensively used to exploit steeply dipping ore bodies by Canadian hardrock metal mines Mine backll is an important constituent of mining process Numerical modelling of mine backll

  • POSSIBILITY OF APPLICATION OF BACKFILL METHODS

    Vertical crater retreat mining method VCR Vertical Crater Retreat method applies to orebodies with steep dip and petent rock in both ore and host rock Part of the blasted ore will remain in the stope over the production cycle serving as temporary support This mechanized

  • Research Study On Pillar Design For Vertical Crate

    Largediameter 6 12in blastholes were an integral part of the stoping method at each mine A true vertical crater retreat VCR method was used at the Homestake Mine while a vertical bench mining method VBM was used at the Carr Fork Mine

  • Shrinkage Stoping Vertical Crater Retreat Stoping

    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

  • Study On The Longhole Raising Technique Using One

    On the other hand several blasting technique innovations have also improved the raising safety In Canada in 1975 mining pany INCO developed a mining method based on Livingstons cratering theory This method is called vertical crater retreat VCR or vertical retreat mining VRM method

  • Underground Mine Design Test 1 Flashcards Quizlet

    Start studying Underground Mine Design Test 1 Learn vocabulary terms and more with flashcards games and other study tools

  • Underground Mining Hard Rock Wikipedia

    VRM VCR Vertical retreat mining VRM also known as Vertical crater retreat VCR is a method where mine is divided in vertical zones clarification needed with depth of about 50 meters using open stoping bottomup mining

  • Vertical Crater Chapter 11 Vertical Crater

    Vertical Crater Retreat an Important New Mining Method LC LANG INTRODUCIION The introduction of 165mm 6 in holes to underground mining operations has made possible the application of Canadian Industries Ltds CIL vertical crater retreat VCR mining method illustrated in the acpanying sketches

  • Vertical Crater Retreat Mining In The Sudbury Basi

    Vertical crater retreat mining in the Sudbury Basin Min Sci Technol 13 131143 Faced with rising costs and lower metal prices several Ontario base metal sulphide mines have changed their method of mining to vertical crater retreat mining

  • Vertical Crater Retreat Mining In The Sudbury Basi

    aced with rising costs and lower metal prices several Ontario base metal sulphide mines have changed their method of mining to vertical crater retreat mining This is a bulk mining method that utilises large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes The orebody is mined

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