vertical crater retreat mining method vcr

vertical 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 …

VERTICAL CRATER RETREAT.pptx | Mining | Geology

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

Vertical Crater Retreat.pdf | Economic Geology | Mining

crater retreat (VCR) mining method, illustrated in the were drilled downward into the pillar, and by measuring accompanying sketches. This unique and revolutionary the depth of the holes, the results of the uphole blast

Vertical Crater Retreat Mining Method - laceno.eu

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.

Vertical Crater Retreat (VCR): Underground Mine …

the spherical charge is positioned at a distance underneath and the detonation creates a crater shape opening in the rock -several holes are detonated at the same level creating a horizontal slice. ore is excavated in slices starting …

Design 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).

National Exams May 2015 09-MMP-A2, Underground Mining ...

1.2.2 Vertical Crater Retreat (VCR) Discuss the geology, geometry and rock strength issues applicable to the vertical crater retreat mining method. (3 marks) ... cycle of operations utilizing the vertical crater retreat (VCR) method of mining. Clearly show examples of …

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.

Underground Mining Methods (3.1) - YouTube

Jan 14, 2013· Mining Exploration Session 3. Professor Kazem Oraee.

vertical crater retreat mining method - rishaeyehospital.com

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.

vertical crater retreat mining method vcr - eurotrak.eu

CRATER RETREAT MINING BY: SUJAN DALBEHERA DEVGAN SINGH ABHAYA MISHRA 1 VCR MINING Vertical crater retreat (VCR) mining is a method originally ... Vertical crater retreat - QueensMineDesignWiki Vertical crater retreat (VCR), also known as Vertical retreat mining…

Research Study on Pillar Design for Vertical Crater ...

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 …

vertical crater borehole mining method - …

Feb 14, 2016· Underground hard rock mining refers to various underground mining techniques used to Shafts are vertical excavations sunk adjacent to an ore body. . as Vertical crater retreat VCR is a method where mine is divided in vertical .

vertical crater retreat mining method vcr - eurotrak.eu

CRATER RETREAT MINING BY: SUJAN DALBEHERA DEVGAN SINGH ABHAYA MISHRA 1 VCR MINING Vertical crater retreat (VCR) mining is a method originally ... Vertical crater retreat - QueensMineDesignWiki Vertical crater retreat (VCR), also known as Vertical retreat mining, is an open stoping, ...

Shrinkage and 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 the block being mined.

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

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…

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 mining.

Geotechnical aspects of vertical crater mining …

Geotechnical aspects of vertical crater mining method in a deep mine S. C. Goel ... these factors favour a VCR method in a deep mining environment. The joint orientations, however, ... Crater Retreat mi n i ng method a potential alternative. Visits were made to a …

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 - crownsecurity.in

vertical crater retreat mining method. Home » Project Case » vertical crater retreat mining method. Related Posts. vertical grinding mill mining; ... vertical crater retreat (VCR) – Mining and Blasting. Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA. Get A Quote

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 crater retreat mining method vcr - vojtech …

Vertical Crater Retreat - RitchieWiki. A vertical crater retreat (VCR), also referred to as vertical retreat mining, involves drilling large-diameter holes into the orebody vertically from the top of the mine, as opposed to the conventional blasthole stope method of drilling them in fans from bottom to top.

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, approved.

vrm vertical crater retreat – Grinding Mill China

Vrm Vertical Crater Retreat vertical crater retreat mining method vcr Menghancurkan Vertical Crater Retreat is compared to other open . these .. » Learn More Pre: namibian gold granite

(PDF) Underground mining Methods - ResearchGate

c) Unsupported, supported and caving underground mining methods Hard rock under ground mining methods can be classified as the follo wing:- Hard rock Mining Me thods

Creighton's VCR mechanics. (vertical crater retreat mining ...

Inco's commitment to Vertical Crater Retreat (VCR) mining has been particularly intense. The company has constantly reviewed and incorporated the latest in mining materials, equipment, blasting and filling methods, remote control and the like, and constantly refined VCR planning and design to ensure greater productivity and safety.

Geotechnical aspects of vertical crater mining method …

Synopsis. 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.

Vertical crater retreat mining in the Sudbury Basin ...

Stopes are mined using the VCR method and ore handled by a fully integrated system including the CL-1000 Osciloader, an Eagle-3640 low profile crusher, and extensible face conveyor and one mobile VERTICAL CRATER RETREAT MINING IN THE SUDBURY BASIN 139 90 belt bender.