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vertical crater retreat mining method

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.

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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

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Vertical crater retreat mining in the Sudbury Basin ...

Sep 01, 1991  Vertical crater retreat mining in the Sudbury Basin. Min. Sci. Technol., 13: 131-143. 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 ...

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Vertical crater retreat mining in the Sudbury Basin ...

The safety aspect of vertical crater retreat mining has been of concern, and was the focus of a provincial inquiry. The benefits in improved safety are demonstrated through an analysis of various records kept by the mines and provincial agencies. Future trends can now be envisaged, particularly in relation to deep mining.

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VERTICAL CRATER RETREAT - researchgate.net

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

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vertical crater retreat (VCR) – Mining and Blasting

Aug 04, 2011  vertical crater retreat (VCR) August 4, 2011 by PARTHA DAS SHARMA Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method

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Vertical Crater Retreat Mining Science

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. VCR is based on the crater blasting technique in which powerful explosive charges are.

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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.

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VCR Method_2018.pdf - MINE 411 Underground Mining Methods ...

MINE 411 Underground Mining Methods Equipment Course Instructor: Prof. Raymond S. Suglo Students: UMaT BSc. III 1 VERTICAL CRATER RETREAT (VCR) MINING METHOD The Vertical Crater Retreat (VCR) method is basically an open stoping method which resembles shrinkage stoping. It was developed in Canada. Area of Application The VCR method is used in mining steeply dipping

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Vertical Crater Retreat Mining Method

Vertical Crater Retreat Mining In The Sudbury Basi. 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

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Shrinkage and Vertical Crater Retreat Stoping

Oct 23, 2014  6) Vertical Crater Retreat (VCR) stoping 8 9. 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.

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

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

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

On the other hand, several blasting technique innovations have also improved the raising safety. 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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8.3.2: Shrinkage Stoping ABC 123: Testing Site / Course

The variant is known as the vertical crater retreat (VCR) mining method. It was invented by mining engineers working in the nickel mines in Canada. The company, INCO or International Nickel Company as it was known, obtained a patent on the method, and until the patent expired near the end of the 20th century, INCO had exclusive use of this new ...

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Modeling of Dynamic Break in Underground Ring Blasting

By way of an example, using a ring pattern for sublevel cave mining with a toe spacing of 2.7 m (8.9 ft), with a 2.4 m (7.9 ft) burden between rings - with the longest hole in the ring having a length of 30.5 m (100 ft), and using the rectilinear figure, the volume would be 198 m 3. With this volume as common to the other figures, the radial ...

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Sublevel Stoping Mining Method - YouTube

Black Diamond Drilling Services AustraliaDatabase

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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. VCR method has been an established mining method

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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.

Read More
8.3.2: Shrinkage Stoping ABC 123: Testing Site / Course

The variant is known as the vertical crater retreat (VCR) mining method. It was invented by mining engineers working in the nickel mines in Canada. The company, INCO or International Nickel Company as it was known, obtained a patent on the method, and until the patent expired near the end of the 20th century, INCO had exclusive use of this new ...

Read More
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. VCR method has been an established mining method

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What kinds of minerals are mined using vertical crater retreat

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.

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Lesson 8.3: Mining by Unsupported Methods ABC 123 ...

The name of this method derives from this drawing off or shrinkage of the stope. A modern and important variant of this method is known as vertical crater retreat (VCR) mining. A few examples of commodities mined by this method include iron and palladium. Open stoping. This type of mining is used to recover steeply dipping orebodies in ...

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

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

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The Best Methods for Underground Mining - Industry Tap

Apr 14, 2021  The vertical crater retreat mining method is also known as VCR mining. This mining method precipitously dips strata for mineralization. This method blasts rocks with total and heavy charges with a large diameter of 165 mm. VCR’s blasting creates a cone-shaped opening in the targeted rock mass to let the materials be mined quickly.

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POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH ...

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 ...

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Major Mines Projects Deepening Inferred (Extension ...

Aug 17, 2021  The Pilar UG Mine has previously employed the following mining methods: Sublevel Stoping, VRM and Vertical Crater Retreat (“VCR”). VRM is the method currently employed, whereby ore is removed from the stope after it is blasted and cemented paste backfill is pumped into the mined stopes to ensure geotechnical stability prior to advancing to ...

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Major Mines Projects - Mining Intelligence and News

The mining methods used include Vertical Crater Retreat (“VCR”), Sub-Level Caving (“SLC”), and Longitudinal Room and Pillar (“RAP”). Mufulira. The mining methods employed at Mufulira Mine are variants of Mechanised Continuous Retreat (“MCR”).

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The Blasting Test and Blasting Vibration Monitoring of ...

May 04, 2016  The blasting test on the vertical crater retreat mining method and the blasting vibration were analyzed. It is estimated if the vibration damage possibly the surface buildings and related facilities of mine. Introduction. The initial design scheme of the Luohe iron mine was sub-level caving mining. In the collapse area, the requisition of lands ...

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(PDF) UNDERGROUND MINING METHODS Timileyin Ayomide ...

There are several methods for bulk underground mining, the most common being block caving, long hole open stoping, sublevel open stoping, sublevel caving and vertical-crater-retreat. 2.2.1 Block Caving Block caving is a large-scale production technique applicable to homogeneous ore bodies of large dimensions and most commonly steep to vertical ...

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Underground Mining Methods - UFRGS

Underground Mining Methods and Applications FIGURE 1.3 Post room-and-pillar mining mined out Numbers indicate sequence of extraction FIGURE 1.4 Step-room mining of inclined orebody Deposits with large vertical heights are mined in slices. Mining starts at

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Abstract - USGS

vertical crater retreat mine model The VCR mining method is used on vertical or steeply dipping ore bodies under similar conditions for sublevel stoping and shrinkage stoping. Down-the-hole drills are used for production, with small jumbos used for drift development.

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