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What kinds of minerals are mined using vertical crater retreat Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, What kinds of minerals are mined using vertical crater retreat, quarry, aggregate, and different kinds of minerals.
Vertical crater retreat (VCR) mining is a method originally developed by the Canadian mining company INCO. Today, VCR is an established mining method used .
This method is not as popular as it once was. 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.
vertical crater retreat mining method customer case. 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.
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...
VCR - Vertical Crater Retreat. Looking for abbreviations of VCR? It is Vertical Crater Retreat. Vertical Crater Retreat listed as VCR. ... Mining methods using up-dip vertical crater retreat with post-fill are being examined in order to improve mining recovery and ... vertical conveyor; Vertical Crater Retreat; vertical crest of internal ...
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 large-scale underground 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 .
Vertical Crater Retreat (VCR) - Flashcards. Flashcard Deck Information. Class: MINE 3564 - Underground Mine Design ... Applications appropriate for Vertical Crater Retreat -steep dip (over 45 degrees)-large vertical extent ... -higher risk for damaging surrounding rock than SLOS method-dilution. Generated by Koofers. List View: Terms ...
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 ...
Mar 01, 2019· Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA. ... Vertical Crater Retreat (VCR) method. View this document on Scribd. Advertisements. Posted in blasting, explosives, mining | Tagged blasting in underground metal mines, underground metal mines, vertical crater retreat ...
VCR mining applicable to similar ore-rock conditions as Sublevel Open stoping VCR is technically simpler with DTH drilling compared to top hammer drilling DTH holes are straight with minimal hole deviations VCR charging is complex, techniques must be mastered by the charging team
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 large-scale underground mining .
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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 ...
Oct 23, 2014· Shrinkage and Vertical Crater Retreat Stoping 1. Hassan Z. Harraz hharraz2006@yahoo 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.
* 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. Livingston.
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
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 ...
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 .
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.
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 ...
3.3. 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 ...
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.
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