Vertical Crater Retreat Mining Method

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Vertical crater retreat - QueensMineDesignWiki

Vertical crater retreat (VCR), also known as Vertical retreat mining, is an open stoping, bottom-up mining method that involves vertically drilling large-diameter holes into the orebody from the top, and then blasting horizontal slices of the orebody into an undercutVertical Crater Retreat - RitchieWiki,Vertical crater retreat is a beneficial mining method because it reduces the cost of mining orebodies that are wide and steep It also eliminates the need for a support system after the blasting occurs and increases mining safety because miners do not have to beBlasting in High Production UG Metal Mines workings ,Aug 04, 2011 · This entry was posted in blasting, explosives, mining and tagged blasting in underground metal mines, underground metal mines, vertical crater retreat (VCR) Bookmark the

Shrinkage and Vertical Crater Retreat Stoping - SlideShare

6) Vertical Crater Retreat (VCR) stoping 8 9 VCR - Vertical Crater Retreat 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 minedVertical Crater Retreat | Mining | Nature - Scribd,VCR MINING Vertical crater retreat (VCR) mining is a method originally developed by the Canadian mining company INCO Today, VCR is an established mining method used by mines all over the world that have competent, steeply dipping ore and host rock VCR is based on the crater blasting technique in which powerful explosive charges areVertical Crater Retreat | Mining | Industries,Vertical Crater Retreat Blasthole mining is a general term applied to mining methods that employ long hole drilling for the production of ore In most Blasthole methods the ore is

Vertical crater retreat mining in the Sudbury Basin

Vertical crater retreat mining in the Sudbury Basin Min Sci Technol, 13: 131-143 Faced with rising costs and lower metal prices, several Ontario base metal sulphide mines have changed their method of mining to vertical crater retreat miningStudy on the long-hole raising technique using one blast ,On the other hand, several blasting technique innovations have also improved the raising safety In Canada in 1975, mining company INCO developed a mining method based on Livingston's cratering theory This method is called vertical crater retreat (VCR) or vertical retreat mining (VRM) methodvertical crater retreat mining method - cleanseas,Vertical crater retreat mining in the Sudbury Basin Faced with rising costs and lower metal prices, several Ontario base metal sulphide mines have changed their method of

VERTICAL CRATER RETREAT - ResearchGate

VCR MINING Vertical crater retreat (VCR) mining is a method originally developed by the Canadian mining company INCO Today, VCR is an established mining method usedDesign and Application of Sublevel Stoping Methods ,Introduction This course refers to the generic mining method of sublevel stoping The most commonly used sublevel stoping mining methods are sublevel open stoping, long-hole open stoping or blasthole stoping, and vertical crater retreat (VCR)(PDF) Underground mining Methods - ResearchGate,Shrinkage stoping may be termed a “ classic” mining method, having been perhaps the most popular mining method for mos t of the past century It has largely been replaced by mechaniz ed

Vertical Crater Retreat (VCR): Underground Mine Design

Vertical Crater Retreat (VCR) - Flashcards Flashcard Deck Information Class: MINE 3564 - Underground Mine Design the spherical charge is positioned at a distance underneath and the detonation creates a crater shape opening in the rock -higher risk for damaging surrounding rock than SLOS method-dilution Generated by Koofers List vertical mining process - perkinspreschool,May 27, 2018 · Vertical crater retreat mining in the Sudbury Basin - ScienceDirect Faced with rising costs and lower metal prices, several Ontario base metal sulphide mines have changed their method of mining to vertical crater retreat miningVertical Crater Retreat - [DOC Document],Mining retreats horizontally as successive vertical slices are blastedVertical block mining is the term most often used for this method In VBM the workplace is divided into a series of vertical blocks and the blocks may be nined on a retreat basis working from the ends of the workplace

Research Study on Pillar Design for Vertical Crater

Large-diameter (6 1/2-in) 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 MineUnderground mining techniques - Universidade Federal do ,with large vertical heights are mined in horizontal slices starting at the top and benching down in steps Post room-and-pillar mining (Figure 13) applies to inclined ore bodies with dip angles from 200 to 550 These mines have large vertical heights where the mined-out space is backfilledvertical crater retreat (VCR) – Mining and Blasting,vertical crater retreat (VCR) August 4, 2011 by PARTHA DAS SHARMA Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method View this document on Scribd explosives, mining | Tagged blasting in underground metal mines, underground metal mines, vertical crater retreat (VCR) | Leave a comment

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, bottom-up miningTechniques in Underground Mining - ILO Encyclopaedia,Techniques in Underground Mining Vertical crater retreat mining Like sublevel stoping and shrinkage stoping, vertical crater retreat (VCR) mining is applicable to mineralization in steeply dipping strata It qualifies as a safe mining method becauselongitudinal retreat mining method - greenrevolutionorg,vertical crater retreat mining method -- China Mining Equipment CO, Ltd 2011 5 26mining methods mining handbook document transcript chapter 62 mining methods explosives mining and blastingdedicated to the local and family history of cradley in the black country survivalblog retreat locales archives

POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH

33 Vertical crater retreat mining method - VCR Vertical Crater Retreat method applies to orebodies with steep dip and competent 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 method can be regarded as a considerably safer form of A new model for mining method T selection of mineral ,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 are302 - A Framework for Stope Sequence Optimization,Many 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,

302 - A Framework for Stope Sequence Optimization

Many 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,The Blasting Test and Blasting Vibration Monitoring of ,vertical crater retreat mining method and the blasting vibrationwereanalyzedItisestimatedifthevibration damage possibly the surface buildings and related facilities of mine Keywords Iron mine Vertical crater retreat mining method (VCR) Blasting test Vibration monitoring 1 Introduction The initial design scheme of the Luohe iron mine wasNotes on Vertical Crater Retreat Method - sitesgoogle,Notes on Vertical Crater Retreat Method mining rate Case Studies Falconbridge Nickel Mines - used for rib pillar recovery (before VCR was employed, cut and fill, and sub-level stoping were employed for pillar recovery) - each pillar is 107-122 m long, 61 m high and 67 m wide

Vertical Crater Retreat (VCR) con relleno by Vanessa

* Medida inicial de los barrenos * Tapar / sellar el fondo de los barrenos * Cebado y carguío de los barrenos * Medida de altura de la carga * Sellado superior * Conexión al tren de encendido en el nivel superior *Se fundamenta en la teoría de cráteres de C LivingstonSHORT DELAY BLASTING PRESENTATION - Academiaedu,Vertical crater retreat The most common drill hole diameter used in VCR mining is 165mm Blasted ore is collected at the draw points using LHD vehicles, and then transported to ore passes, sometimes to be crushed, before it is transported to surface for processing Upon completion of the ore extraction, the stope is often backfilled from the top Vertical Crater Retreat | Mining | Industries,Vertical Crater Retreat Blasthole mining is a general term applied to mining methods that employ long hole drilling for the production of ore In most Blasthole methods the ore is blasted into a vertical

Geotechnical aspects of vertical crater mining method in a

Vertical Crater Retreat is compared 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 environmentvertical crater retreat mining method - postcatcher,vertical crater retreat mining method – Grinding Mill Vertical Crater Retreat Stoping as Applied at the Homestake, 28 Jul 2012, Therefore, the feasibility of Study on the long-hole raising technique using onevertical crater retreat mining method - postcatcher,vertical crater retreat mining method vertical crater retreat mining method – Grinding Mill Vertical Crater Retreat Stoping as Applied at the Homestake, 28 Jul 2012, Therefore, the feasibility of Study on the long-hole raising technique using one

Rock Mechanics Study of Shaft Stability and Pillar Mining

mechanized cut-and-fill and vertical crater retreat occurred Pillar mining began below the 3650 level in late 1988 Shortly Although only a small tonnage of ore in the shaft pillar hadVertical crater retreat : a new mining method (Book, 1979 ,Add tags for "Vertical crater retreat : a new mining method" Be the first Similar Items Related Subjects: (1) Mining engineering Confirm this request You may have already requested this item Please select Ok if you would like to proceed with this request anyway Linked DataVERTICAL CRATER RETREATpptx | Mining | Science,Vertical crater retreat (VCR) mining is a method originally developed by the Canadian mining company INCO Today, VCR is an established mining method used by mines all over the world that have competent, steeply dipping ore and host rock

View source for Vertical crater retreat - QueensMineDesignWiki

View source for Vertical crater retreat From QueensMineDesignWiki ← Vertical crater retreat Jump to: navigation, search You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in one of the groups: Users, approvedvertical crater retreat mining method - abwasseranlageneu,Vertical crater retreat (VCR) mining is a method originally developed by the Canadian mining company INCO Today, VCR is an established mining method used by mines all over the world that have competent, steeply dipping ore and host rock,

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