vertical crater retreat mining method

vertical crater retreat mining method

  • Vertical crater retreat - QueensMineDesignWiki

    The first characteristics to evaluate are the size, dip and plunge of the orebody, which is important because the installations of draw points are essential to the gravity flow of the blasted ore for collection. The second element to assess is the shape and consistency of the orebody. Two horizontal drifts are required before mining can take place, which are to have a very large vertical separation. The distance between the
  • 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.

  • Vertical Crater Retreat

    Vertcial crater retreat is a comparatively new method of blasthole mining in which only large diamter ITH holes are used to blast down horizontal slices of ore into an opening below the block of ore being mined. The method on the 'cratering' effect of an explosive charge being blasted close to the end of

  • Shrinkage and Vertical Crater Retreat Stoping

    2014-10-23  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 mined.

  • Vertical crater retreat mining in the Sudbury Basin ...

    The paper reviews the history of vertical crater retreat mining, various methods of applying vertical crater retreat layouts, the development of in-the-hole drills capable of drilling the large diameter holes required, methods of explosives loading and blasting to achieve the required cratering effect, methods of ground support including backfill placement, and the ore loading equipment presently being utilized

  • Cited by: 2
  • Vertical crater retreat mining in the Sudbury Basin ...

    1991-09-01  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. This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes.

  • Cited by: 2
  • 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 with depth of about 50 meters using open stoping, bottom-up mining.

  • 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 ...

  • (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

  • 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 mining to vertical crater retreat mining. This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes. The ore body is mined from the bottom up. The method in turn has required a ...

  • (PDF) Shrinkage stoping and Vertical Crater Retreat stoping

    V ert ical Crater Retreat (VCR) or V ertical Retreat Stoping: configuration method in stopes where drilling large diameter is used to detonate horizontal slices of ore, leading them to the base of ...

  • Vertical Crater Retreat.pdf [34m7g923oz46]

    Then the new blasting method developed into a new mining method called vertical crater retreat, and is gaining acceptance by the industry. Its application in pillar recovery and in primary stopes has resulted in the elimination of raise boring and slot cutting. Dilution of the ore by backfill material . Related Documents. Vertical Crater Retreat November 2019 16. Vertical Crater Retreat.pdf ...

  • Vertical Crater Retreat Mining Method - goudkampstables.nl

    Vertical Crater Retreat Mining Method nnguniclub. vertical crater retreat mining method Grinding Mill . 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 large-scale underground mining based on CW ~ivingston'scrater ...

  • Vertical Crater Retreat Mining Method

    vertical crater retreat mining method. 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. Download Free png Vertical crater retreat mining . Vertical crater retreat mining method (Atlas

  • NIOSHTIC-2 Publications Search - 10005188 - Research Study ...

    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. Since there are no personnel in a VCR or VBM stope, all ground control including dimensioning of stopes and pillars and the layout of cable bolt assays or other artificial support must be done in advance of production blasting. Accordingly, the ...

  • Types of Mining Methods Sell Side Handbook

    2018-03-09  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. In this method, ore is mined in ...

  • VCR N°2 - Como medir un cráter invertido - YouTube

    2017-12-10  Atlas Copco- Block Caving Mining Method - Duration: 3 ... Mining In Minnesota - Cut and Fill Mining Method 3D Animation - Duration: 6:36. ImageMaker Advertising, Inc.

  • MASTER'S THESIS - DiVA portal

    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 56° to 72°, the ore is extracted in stopes and backfilling is employed. The current production level is located at ...

  • Numerical modelling approach for mine backfill

    Sublevel stoping mining methods with delayed backfill are extensively used to exploit steeply dipping ore bodies by Canadian hard-rock metal mines. Mine backfill is an important constituent of mining process. Numerical modelling of mine backfill material needs special attention as the numerical model must behave realistically and in accordance with the site conditions. This paper discusses ...

  • Vertical Crater Retreat Mining Method - goudkampstables.nl

    Vertical Crater Retreat Mining Method nnguniclub. vertical crater retreat mining method Grinding Mill . 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 large-scale underground mining based on CW ~ivingston'scrater ...

  • Vertical Crater Retreat Mining Method

    vertical crater retreat mining method. 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. Download Free png Vertical crater retreat mining . Vertical crater retreat mining method (Atlas

  • Types of Mining Methods Sell Side Handbook

    2018-03-09  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. In this method, ore is mined in ...

  • Edumine Design and Application of Sublevel Stoping Methods

    2019-10-31  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). Variations of this method include vein (Alimak) mining, transverse stoping, Avoca and longitudinal mining. Sublevel stoping accounts for more than 60% of

  • Vertical crater retreat mining method - Mediadreams

    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. More Research Study On Pillar Design For Vertical Crate . Largediameter 6 12in blastholes were an integral part of the ...

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

  • Numerical modelling approach for mine backfill

    Sublevel stoping mining methods with delayed backfill are extensively used to exploit steeply dipping ore bodies by Canadian hard-rock metal mines. Mine backfill is an important constituent of mining process. Numerical modelling of mine backfill material needs special attention as the numerical model must behave realistically and in accordance with the site conditions. This paper discusses ...

  • Deep Mining: A Rock Engineering Challenge SpringerLink

    2019-04-13  vertical crater retreat stoping. unsupported stopes or caving. long wall mining. sublevel caving. block caving. Naturally Supported Stopes. Naturally supported stoping methods are very attractive from the point of view of cost and simplicity of mining. These methods rely on the support provided by the rock mass in which the stoping excavations are situated, i.e. strong relatively unjointed ...

  • MASTER'S THESIS - DiVA portal

    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 56° to 72°, the ore is extracted in stopes and backfilling is employed. The current production level is located at ...

  • Underground Mining methods Flashcards Quizlet

    Vertical Crater Retreat • Modification of sublevel stoping • Long blast holes are drilled to excavate horizontal slices of ore • holes are drilled and loaded from working level at top of stope • Pillar may be left to support mine, or mined areas may be backfilled and pillars removed. Cut and fill Stoping • similar to sublevel stopping, but stopes filled with backfill for support ...

  • Vertical Crater Retreat Mining in the Sudbury Basin - AusIMM

    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. 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...

  • Vertical Crater Retreat Pillar Mining-A Case Study - AusIMM

    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 ...

  • Vertical Crater Retreat Mining Method

    Vertical Crater Retreat Mining Method. We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing equipment and building materials equipment. And they are mainly used to crush coarse minerals like gold and copper ore, metals like steel and iron, Limestone, coal, asphalt, gravel ...

  • Vertical crater retreat : a new mining method (Book, 1979 ...

    Vertical crater retreat : a new mining method. [J W Williams] Home. WorldCat Home About WorldCat Help. Search. Search for Library Items Search for Lists Search for Contacts Search for a Library. Create lists, bibliographies and reviews: or Search WorldCat. Find items in libraries near you ...

  • Definition of vertical crater retreat - Mindat.org

    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. Ref: SME, 1 ii. A variation of the sublevel stoping method that uses basic crater blasting models ...

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

  • Vertical retreat mining Britannica

    Other articles where Vertical retreat mining is discussed: mining: Blasthole stoping: In vertical retreat mining the stope does not take the shape of a vertical slot. Instead, the trough serves as a horizontal slot, and only short lengths at the bottoms of the blastholes are charged with explosives, blowing a horizontal slice of ore downward into the

  • Plastic limit bearing calculation of blasting-roof in deep ...

    This approach, specifically the Vertical Crater Retreat (VCR) mining method, was introduced in China in the 1980s. After decades of development, the VCR method has become the epitome of efficient and safe mining. The present status of the VCR method is summarized in four points: (i) ordinary emulsion explosives replace ammonium nitrate explosives to reduce blasting costs. The blasting charge ...

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  • Major Mines Projects Morro Agudo Mine

    Vertical Crater Retreat; Room-and-pillar; Summary: The primary extraction method at the Morro Agudo Mine is inclined room-and-pillar. The mineralized zones are accessed via a ramp system that is developed in the hanging wall of the deposit. Cross-cuts are then developed into the deposit to access the mineralized material. The ore drives are developed along the strike of the deposit, and stubs ...

  • 12. Mining methods and method selection

    12.4 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 operating personnel into the developing mine void.-After ...