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vertical crater retreat mining method vcr

Vertical Retreat Mining (VRM) or Vertical Crater Retreat (VCR)

VRM is a contraction of ‘Vertical Retreat Mining’, however it is also known as ‘Vertical Crater Retreat’ or ‘VCR’ or sometimes simply called ‘Inverted Crater Blasting’. In 1983, it was called ‘an achievement of the last decade’ and is practiced in mines in Canada, Australia, Europe, Central America, and the U.S. It was advertised as ‘a unique and revolutionary new ...

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Vertical Crater Retreat

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 opening. In most blasthole methods the ore is blasted into a vertical opening. The blastholes may be small diameter long hole carbide drill holes or larger diameter holes drilled with in-the ...

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VCR Method_2018.pdf - MINE 411 Underground Mining

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 to medium large deposits where the country rock and ore are strong and competent and can stand unsupported

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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 used

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VERTICAL CRATER RETREAT.pptx Mining Science

CASE STUDY ON VERTICAL. CRATER RETREAT MINING. BY: SUJAN DALBEHERA DEVGAN SINGH 1. ABHAYA MISHRA 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.

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Shrinkage and Vertical Crater Retreat Stoping

23/10/2014  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, vertical, descending and spherical concentrated loads to ...

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Study on the long-hole raising technique using one blast ...

01/09/2018  This method is called vertical crater retreat (VCR) or vertical retreat mining (VRM) method. VCR method has been an established mining method being practiced in various mines all over the world. 8 An offshoot of this mining method is the VCR drop-raising technique that employs the same spherical crater charge technology as VCR method.9, 10 This technique has vastly improved

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Vertical Crater Retreat Mining Method

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 ...

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vertical crater retreat mining method vcr philippines

Vertical Crater Retreat 34m7w1zp1846. CASE STUDY ON VERTICAL CRATER RETREAT MINING BY SUJAN DALBEHERA DEVGAN SINGH ABHAYA MISHRA 1 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

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Vertical Crater Retreat [34m7w1zp1846]

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 are placed in large-diameter holes and fired. Part of the ...

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Vertical Crater Retreat Pillar Mining-A Case Study -

The Vertical Crater Retreat (VCR) mining method was used to mine two rib pillars at New Broken Hill Consolidated Limited (NEHC) mine at Broken Hill. Experience gained in a trial VCR pillar stope was applied to the design of Panel 3CN pillar (P3CN). Restricted access and a central sandfilled plug in this pillar necessitated the use of angled blastholes and blasting of the stope in two sections ...

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Geotechnical aspects of vertical crater mining method in

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 environment. The joint orientations, however, need to be ...

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Abstract - USGS

Sublevel stoping, vertical crater retreat (VCR), sublevel caving, and cut-and-fill are all methods that can be applied to ore bodies where shrinkage stoping is feasible. The model is valid.for operations with daily mining capacities of 100 to 6,000 st/d. Base-case cost model equations are in table 14, assuming adit entry. For mines with shaft entry, apply the depth factors found in table 10 ...

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POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH ...

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 shrinkage stoping, as no men have to work inside the stope ...

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Vertical crater retreat(VCR meathod)_图文_百度文库

Vertical crater retreat(VCR meathod) - Vertical crater retreat From Queen's University Mine Desig... 百度首页 ; 登录; 加入VIP. 享VIP专享文档下载特权; 赠共享文档下载特权; 100w优质文档免费下载; 赠百度阅读VIP精品版; 立即开通. 意见反馈; 下载客户端; 网页 资讯 视频 图片 知道 贴吧 采购 地图 文库 搜试试 7

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(PDF) Underground mining Methods - ResearchGate

2) Room (Bor d)-and-Pillar mining (or con tinuous mining) method It is the most common supported pillar method, designed and used primarily for mining flat-lying

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vertical crater retreat mining method vcr philippines

Vertical Crater Retreat 34m7w1zp1846. CASE STUDY ON VERTICAL CRATER RETREAT MINING BY SUJAN DALBEHERA DEVGAN SINGH ABHAYA MISHRA 1 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

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machine etaller sand surface mining scribd

VERTICAL CRATER RETREATpptx Mining Science . CASE STUDY ON VERTICAL CRATER RETREAT MINING BY: SUJAN DALBEHERA DEVGAN SINGH 1 ABHAYA MISHRA 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

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longitudinal retreat mining method may

vertical crater retreat mining method; Vertical crater retreat QueensMineDesignWiki Vertical crater retreat (VCR), also known as Vertical retreat mining, is an open stoping, bottomup mining method that involves vertically drilling largediameter holes into the orebody from the top, and then blasting horizontal slices of the orebody into an undercut . Get Price. Vertical Crater Retreat. Mining ...

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Vertical Crater Retreat [34m7w1zp1846]

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 are placed in large-diameter holes and fired. Part of the ...

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Vertical Crater Retreat Mining Method

Vertical Crater Retreat Underground Mining Method. Vertical Crater Retreat (VCR) applies to ore bodies with steep dip and competent rock in both ore and host rock. Read more. Underground Mining Methods by sarah smith on Prezi. Mining is normally done on retreat ... Major Mining Methods Coal Longwall ... Caving Methods Mostly used in vertical metal/nonmetal deposits . Read more. vertical crater ...

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Geotechnical aspects of vertical crater mining method in

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 environment. The joint orientations, however, need to be ...

More

Vertical Crater Retreat Pillar Mining-A Case Study -

The Vertical Crater Retreat (VCR) mining method was used to mine two rib pillars at New Broken Hill Consolidated Limited (NEHC) mine at Broken Hill. Experience gained in a trial VCR pillar stope was applied to the design of Panel 3CN pillar (P3CN). Restricted access and a central sandfilled plug in this pillar necessitated the use of angled blastholes and blasting of the stope in two sections ...

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Drop Raising in Mining (VCR) Method - copper mining

Vertical crater retreat (VCR), also known as vertical retreat mining (VRM), reduces the cost of mining wide, steeply orebodies. The stope has a similar shape, but instead of small longholes drilled in fans, large blastholes are drilled vertically from a top sill to break through into a bottom sill on the sublevel below. This allows the ore to be broken into the bottom sublevel in successive ...

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Design of underground mining with the VCR method -

Τέλος μελετάται η περίπτωση εφαρμογής της μεθόδου V.C.R. σε συνδυασμό με την παραγωγή και τις σφαιρικές γομώσεις σε κοίτασμα Au/Cu.This thesis deals with the underground mining method of Vertical Crater Retreat (VCR) which has been developed during the

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Geotechnical factors - QueensMineDesignWiki

Artificially supported methods include bench-and-fill stoping, cut-and-fill stoping, shrink stoping, and vertical crater retreat (VCR). Cut-and-Fill Mining. Cut-and-fill mining is a very versatile method that can be adapted to an orebody with any shape (Bullock and Hustrulid, 2001). It is a very selective mining method that most commonly advances up-dip in an inclined orebody. Mining costs are ...

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VCR - Vertical Crater Retreat (mining) AcronymFinder

VCR stands for Vertical Crater Retreat (mining). VCR is defined as Vertical Crater Retreat (mining) very frequently. Printer friendly. Menu Search. New search features Acronym Blog Free tools "AcronymFinder. Abbreviation to define. Find. abbreviation; word in meaning; location; Examples: NFL, NASA, PSP, HIPAA,random Word(s) in meaning: chat "global warming" Postal codes: USA:

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Vertical crater retreat(VCR meathod)_图文_百度文库

Vertical crater retreat(VCR meathod) - Vertical crater retreat From Queen's University Mine Desig... 百度首页 ; 登录; 加入VIP. 享VIP专享文档下载特权; 赠共享文档下载特权; 100w优质文档免费下载; 赠百度阅读VIP精品版; 立即开通. 意见反馈; 下载客户端; 网页 资讯 视频 图片 知道 贴吧 采购 地图 文库 搜试试 7

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Underground Mining Methods at Prgera Mine - AusIMM

Conventional drill and blast methods are used for development and production mining. Ground support is effected with Splitset anchors, grouted rebar bolts and grouted cable bolts. Splitsets and grouted rebar can be installed by mechanised means. Vertical crater retreat, slot and massfire, and modified VCR stoping tech- niques are used at Porgera. Stopes are backfilled with a relatively strong ...

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Geotechnical aspects of vertical crater mining method in

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 environment. The joint orientations, however, need to be ...

More

Vertical Crater Retreat Mining Method

Vertical Crater Retreat Underground Mining Method. Vertical Crater Retreat (VCR) applies to ore bodies with steep dip and competent rock in both ore and host rock. Read more. Underground Mining Methods by sarah smith on Prezi. Mining is normally done on retreat ... Major Mining Methods Coal Longwall ... Caving Methods Mostly used in vertical metal/nonmetal deposits . Read more. vertical crater ...

More

Drop Raising in Mining (VCR) Method - copper mining

Vertical crater retreat (VCR), also known as vertical retreat mining (VRM), reduces the cost of mining wide, steeply orebodies. The stope has a similar shape, but instead of small longholes drilled in fans, large blastholes are drilled vertically from a top sill to break through into a bottom sill on the sublevel below. This allows the ore to be broken into the bottom sublevel in successive ...

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Damage Characteristics of Surrounding Rock Subjected

VCR (vertical crater retreat) mining technology is widely used in mine engineering because it possesses many better features, such as higher efficiency and more simple operation. In the mining process, the blasting shock originating simultaneously from the rock-fracturing blasting load also can damage surrounding rock. For better control of the stope boundary, it is a key prospect in ...

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Vertical Crater Retreat (VCR): Underground Mine Design ...

Vertical Crater Retreat (VCR) - Flashcards. Flashcard Deck Information. Class: MINE 3564 - Underground Mine Design: Subject: Mining and Minerals Engineering: University: Virginia Polytechnic Institute And State University: Term: Spring 2014 - of - « Previous card. Next card » INCORRECT CORRECT -INCORRECT -CORRECT -SKIPPED Shuffle Remaining Cards Show Definitions First

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Techniques 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 (“craters”) with very large diameter (about 165 mm) about 3 m away from a free rock surface.

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Geotechnical factors - QueensMineDesignWiki

Artificially supported methods include bench-and-fill stoping, cut-and-fill stoping, shrink stoping, and vertical crater retreat (VCR). Cut-and-Fill Mining. Cut-and-fill mining is a very versatile method that can be adapted to an orebody with any shape (Bullock and Hustrulid, 2001). It is a very selective mining method that most commonly advances up-dip in an inclined orebody. Mining costs are ...

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Mopani Copper Mines - Wikipedia

Vertical crater retreat (VCR), both caving and post-fill, have been the predominant mining method utilised within the Nkana mine, but is now being converted to a combination of sub-level caving (SLC) and open stoping techniques. Vertical shafts from the surface provide access to each of the four underground mines. In addition, in the deeper sections of the Mindola mine and Central Shaft, sub ...

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VCR - Vertical Crater Retreat (mining) AcronymFinder

VCR stands for Vertical Crater Retreat (mining). VCR is defined as Vertical Crater Retreat (mining) very frequently. Printer friendly. Menu Search. New search features Acronym Blog Free tools "AcronymFinder. Abbreviation to define. Find. abbreviation; word in meaning; location; Examples: NFL, NASA, PSP, HIPAA,random Word(s) in meaning: chat "global warming" Postal codes: USA:

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Vertical crater retreat(VCR meathod)_图文_百度文库

Vertical crater retreat(VCR meathod) - Vertical crater retreat From Queen's University Mine Desig... 百度首页 ; 登录; 加入VIP. 享VIP专享文档下载特权; 赠共享文档下载特权; 100w优质文档免费下载; 赠百度阅读VIP精品版; 立即开通. 意见反馈; 下载客户端; 网页 资讯 视频 图片 知道 贴吧 采购 地图 文库 搜试试 7

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