vertical crater retreat mining method

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vertical crater retreat mining method

vertical crater retreat mining method

Vertical Crater Retreat digistar.mb.ca

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 blasted close to the end of the hole.

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Vertical crater retreat mining in the Sudbury Basin

1991-9-1  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 by

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VERTICAL CRATER RETREAT ResearchGate

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...

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Vertical Retreat Mining (VRM) or Vertical Crater

2021-2-26  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

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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. This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes. The ore body is mined from the bottom up. The method in turn has required a change in materials

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Vertical Crater Retreat [34m7w1zp1846]

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 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

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Vertical Crater Retreat Mining Method Mode Design

Definition of vertical crater retreat i a blasting method employed in underground sublevel mining initially a vertical slot extending across the width of the stope is mined the remaining portion of the stope is then blasted by section into the vertical slot following sublevel procedures Vertical Crater Retreat Mining Method

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Geotechnical aspects of vertical crater mining method

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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(PDF) Shrinkage stoping and Vertical Crater Retreat

V ert ical Crater Retreat (VCR) or V ertical Retreat Stoping: configuration method in stopes where drilling large diameter is used to detonate horizontal slices of ore,

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Vertical Crater Retreat Mining Science

2017-4-5  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

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VCR采矿法_知网百科

VCR采矿法(Vertical Crater Retreat mining method)全称为垂直深孔落矿阶段矿房法[1-2],1974年该采矿法在加拿大涅瓦克矿矿柱回采时取得了成功,得到了多国采矿行业的高度重视,随后各国逐步推广应用。

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Baselining Vertical Retreat Mining as a Mining Method

2021-2-26  VRM is a contraction of "Vertical Retreat Mining", however it has other names as well as sophisticated as "Vertical Crater Retreat" or "VCR" or simply called "Inverted Crater Blasting". In 1983, it was called "an achievement of the last decade and is practiced in mines in Australia, Europe, Central America, and the U. S.

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Geotechnical aspects of vertical crater mining method

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.

get price

vertical retreatment mining method

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 This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes The ore body is mined from

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VCR Method_2018.pdf MINE 411 Underground

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 narrow

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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

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Figure 6 from The Blasting Test and Blasting Vibration

DOI: 10.1007/s10706-016-0025-7 Corpus ID: 130698633. The Blasting Test and Blasting Vibration Monitoring of Vertical Crater Retreat Mining Method in the Luohe Iron Mine @article{Rao2016TheBT, title={The Blasting Test and Blasting Vibration Monitoring of Vertical Crater Retreat Mining Method in the Luohe Iron Mine}, author={Zhenbin Rao and S. Cai}, journal={Geotechnical and Geological

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A new model for mining method T selection of mineral

2009-8-26  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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12. Mining methods and method selection

2018-1-30  12.4 Underground mining method •Vertical crater retreat (VCR) stoping-Applied to the cases where conventional shrink stopingis feasible although narrow orebodywidth (< 3 m) may not be tractable, or to the cases where sublevel development is difficult or impossible.-Use of long and subverticalblast holes eliminates the need for entry of

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Vertical Crater Retreat Mining Method

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. Read more. Underground Mining Methods by sarah smith on Prezi.

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vertical retreatment mining method args.pl

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 This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes The ore body is mined from

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POSSIBILITY OF APPLICATION OF BACKFILL METHODS

2017-6-8  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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Mining Method Retreat agromarco.pl

Mining Method Retreat; Oct 23 2014 · Shrinkage and Vertical Crater Retreat Stoping 1 Hassan Z Harraz hharraz2006 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.

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12. Mining methods and method selection

2018-1-30  12.4 Underground mining method •Vertical crater retreat (VCR) stoping-Applied to the cases where conventional shrink stopingis feasible although narrow orebodywidth (< 3 m) may not be tractable, or to the cases where sublevel development is difficult or impossible.-Use of long and subverticalblast holes eliminates the need for entry of

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Types of Mining Methods Sell Side Handbook

2018-3-11  Vertical crater retreat is another variation of long-hole stoping and is used for ore bodies that are steeply dipping. Depending on the type of ore body, the appropriate variation is selected. Shrinkage Stoping. Shrinkage stoping is an overhand mining method that is used for self-supporting vertical

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Mine Productivity Issues: A Case Study of Mopani

2020-1-5  Vertical crater retreat (VCR) is a beneficial Mining method because it reduces the cost of mining orebodies that are wide and steep. It also eliminates the need for a support system after the blasting occurs and increases mining safety of operations because drilling and blasting are carried out from above and there is no need for the miner to

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Sub level open stoping mining method for the Remaja

2017-4-24  methods have been studied and compared respectively as part of Vertical Crater Retreat and Sub Level Stoping mining methods. Actually the latter method is not strictly Sub Level Stoping, because in order to minimize the risk of collapse of the hanging wall, which dips at

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Lesson 8.3: Mining by Unsupported Methods ABC

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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Geotechnical factors QueensMineDesignWiki

2019-6-28  Artificially supported methods include bench-and-fill stoping, cut-and-fill stoping, shrink stoping, and vertical crater retreat (VCR). Cut-and-Fill Mining. Cut-and-fill mining is a very versatile method that can be adapted to an orebody with any shape (Bullock and Hustrulid, 2001). It is a very selective mining method that most commonly

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