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 ...

Vertical Crater Retreat (VCR) ... at a distance underneath and the detonation creates a crater shape opening in ... surrounding rock than SLOS method

Get this from a library! Vertical crater retreat : a new mining method. [J W Williams]

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

Vertical Crater Retreat - RitchieWiki. 20 Oct 2009 ... Vertical crater retreat is a beneficial mining method because it reduces the cost of mining orebodies that are ...

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 ...

This article is about the orebody requirements and developmental steps involved in Vertical Crater Retreat planning and mining. ... vertical-crater-retreat-mining-method;

copper production in kitwe zambia a vertical crater retreat is the predominant mining method while sublevel open stopping and sublevel caving

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 ...

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.

Posts about vertical crater retreat ... Weblog of Partha Das Sharma For Discussing Various Aspects of Mining, Explosives and ... Vertical Crater Retreat (VCR) method.

16.1 LONGHOLE LONGITUDINAL RETREAT MINING METHOD The mining ... This mine utilised an early version of the vertical crater retreat mining method that was ...

Mining information: Vertical Crater Retreat. Also find mining business, people, countries, commodities, technology & research.

Underground mining method; Shrinkage stoping, Ascending method of mining, Advantages and Disadvantages, Vertical Crater Retreat stoping, Introduction, Applica…

Rock Mechanics Study of Shaft Stability ... Rock Mechanics Study of Shaft Stability and Pillar Mining, ... mechanized cut-and-fill and vertical crater retreat ...

mining rate Case Studies Falconbridge Nickel Mines - used for rib pillar recovery (before VCR was employed, ... Notes on Vertical Crater Retreat Method

The EduMine online course Design and Application of Sublevel Stoping Methods ... > Mining > Design and Application of Sublevel ... vertical crater retreat ...

to 5 new mining levels at 50 m vertical intervals, ... mining method and the deployment of equipment to ensure the cheapest and most efficient working arrangement.

Techniques in Underground Mining ... Vertical crater retreat mining. ... It qualifies as a safe mining method because the miners always work inside drift-size ...

Vertical crater retreat : a new mining method … Vertical crater retreat : a new mining method. [J W Williams] Home. WorldCat Home About WorldCat Help.

Vertical Crater Retreat is compared to other open stoping methods. Various geotechnical factors have been considered including the effects of stress concentration ...

Vertical Crater Retreat: an Important New Mining … Document Summary for "Vertical Crater Retreat: an Important New Mining Method" » Learn More

VCR MINING. Vertical crater retreat (VCR) mining is a method originally developed by the Canadian mining company INCO. Today, VCR is an established mining ...

There are two principal phases of underground mining: ... (VRM) also known as Vertical crater retreat (VCR) is a method where mine is divided in vertical zones ...

Outline of Topic 5: Shrinkage stoping Ascending method of mining Advantages and Disadvantages Vertical Crater Retreat stoping Introduction

Aug 04, 2011· Mining and Blasting Weblog of Partha Das Sharma For Discussing Various Aspects of Mining, Explosives and Blasting . ... Vertical Crater Retreat (VCR) method.

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Aug 11, 2011· Vertical crater retreat is the predominant mining method while sublevel open-stopping and sublevel caving methods are ... is the largest copper mining ...

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 Mining Method. Vertical Crater Retreat – RitchieWiki – Equipment . A vertical crater retreat (VCR), also referred to as vertical retreat ...

MINING - Coin Mine- vertical crater retreat mining method ,Are these grades good? The following are considered 'high grades' for the purposes of most North and South ...

either of two methods: room-and-pillar mining or longwall mining. Room-and-Pillar Mining The room-and-pillar mining method entails the exca- ... This Is Mining ... ...

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 ...