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).

Vertical crater retreat - QueensMineDesignWiki

History . The VCR mining method was developed by INCO and CIL Inc., and is based on Mr. C.W. Livingston's crater blasting theories. It was first used in 1974, at the Levack mine located in the Sudbury Basin's North Range, and it provided productivity benefits almost immediately.

vertical crater retreat mining method - postcatcher.in

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.

Vertical Crater Retreat - [DOC Document]

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…

Vertical Crater Retreat.pdf | Economic Geology | Mining

Chapter 11. Vertical Crater Retreat: an Important New Mining Method L.C. LANG INTRODUC'I'ION the standard uphole method was used to blast down the

(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 | Industries - Scribd

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 …

Shrinkage and Vertical Crater Retreat Stoping - SlideShare

Underground mining method; Shrinkage stoping, Ascending method of mining, Advantages and Disadvantages, Vertical Crater Retreat stoping, Introduction, Applica… Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.

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 in advance of production blasting. Accordingly, the ...

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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 ...

Blasting in High Production UG Metal Mines workings ...

2011-08-04· This entry was posted in blasting, explosives, mining and tagged blasting in underground metal mines, underground metal mines, vertical crater retreat …

Geotechnical aspects of vertical crater mining method in …

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.

A new model for mining method T selection of mineral ...

Mining method selection is a critical point and a strategic issue in the mining engineering process. Selection of a method unsuitable for deposit characteristics may make exploitation of the orebody troublesome and sometimes uneconomical. So, available deposits should be evaluated carefully in an optimum manner. In the process, the selection of the most appropriate mining method is of great ...

Underground Mining Methods (3.1) - YouTube

2013-01-14· Mining Exploration Session 3. Professor Kazem Oraee.

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.

Vertical Crater Retreat (VCR) con relleno by Vanessa ...

Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. United States of America: Society for Mining, Metallurgy, and Exploration, Inc. Obtenido de: United States of America: Society for Mining, Metallurgy, and Exploration, Inc. Obtenido de:

Geotechnical aspects of vertical crater mining method in a ...

Geotechnical aspects of vertical crater mining method in a deep mine S. C. Goel Zambia Consolidated Copper Mines Ltd, Zambia SYNOPSIS Vertical Crater Retreat is compared to other open

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.

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, must involve fairly consistent development procedures and stope dimensions. Natural variability of orebody ...

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.

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

cycle of operations utilizing the vertical crater retreat (VCR) method of mining. Clearly Clearly show examples of the following in your sketch, "raise", ~~S~Ot~~ and "stope"

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

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) method.

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