vertical crater retreat mining method

Evolution of Vertical Crater Retreat Mining at Mindola ,
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Mindola mine is currently the deepest mine in the Zambian copper belt Stoping is currently active to 1330 m below surface with long range plans indicating future production from 1590 m level The orebody is tabular and dips between 55o to vertical The thickness varies from 8 to 14 m The vertical crater retreat method of mining was first introduced at Mindola mine in the late ,...

Longitudinal Retreat Mining Method
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Selecting a mining methodSome common ones include longitudinal stoping, transverse longitudinal stoping, big-hole stoping, and vertical crater retreatLongitudinal stoping, also referred to as bench stoping or sublevel benching is a preferred method when the orebody is thin and narrow and steeply dipping and sheet-like...

Shrinkage and Vertical Crater Retreat Stoping
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27-06-2015 0183 32 Shrinkage and Vertical Crater Retreat Stoping prev next out of 19 Post on 27-Jun-2015 974 views ....

vertical crater retreat mining method vcr
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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...

Geotechnical aspects of vertical crater mining method in a ,
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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
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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 blasting technique in which powerful explosive charges are placed in large-diameter ,...

vertical retreat mining
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13 vertical retreat mining vertical retreat mining vrm is a bulk method of mining used in most of vales underground mines it is a versatile method that can be used for longitudinal or transverse mining applications vrm is best suited for ore dipping at 55 or greater and may be used in a variety of ground conditions where the drilled...

Vertical Crater Retreat PDF Mining Science
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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...

vrm vertical crater retreat
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The vertical crater retreat method of mining was first introduced at Mindola mine in the late1980s following several trials that helped define the design criteria Know More vrm vertical crater retreat Comment marche concassage verticalvertical crater retreat vcr , also known as vertical retreat mining vrm , »...

Study on the long
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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 being practiced in various mines all over the world 8...

Vertical crater retreatpdf
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Vertical crater retreat From QueensMineDesignWiki This article is about the orebody requirements and developmental steps involved in Vertical Crater Retreat planning and mining Vertical crater retreat VCR , also known as Vertical retreat mining, is an open stoping, bottom-up mining method that involves vertically drilling large-diameter holes into the ,...

open pit mining methodvertical crater retreat mining ,
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Vertical crater retreat mining in the Sudbury Basin Several mining methods are employed to extract the ore, including blasthole, cutand fill, undercut and fill, sublevel caving, block caving, open pit, and vertical crater retreat VCR VCR has gradually supplanted other mining methods until today about three quarters of the Sudbury output is obtained using VCR...

Vertical Crater Retreat Mining Method
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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 ,...

Primary vertical Crafter Retreat Mining at the Zinc ,
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Vertical crater retreat mining is being used at Zinc Corporation, Limited and New Broken Hill Consolidated, Limited for pillar recovery between previously mined and filled stop In order to increase productivity in the older lead lode areas of the mine, particularly in the lower grade sections around the keel of the orebody, score form of longhole stoping was considered ,...

Shrinkage and Vertical Crater Retreat Stoping
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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 ,...

Vertical crater retreat mining in the Sudbury Basin ,
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01-09-1991 0183 32 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 hol...

Vertical crater retreat mining in the Sudbury Basin ,
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01-09-1991 0183 32 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 ....

Lecture 4 Underground Mining
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02-11-2011 0183 32 HZ Harraz Presentation Mining Methods 29 30 7 Vertical Crater Retreat VCR Stoping Vertical longholes are drilled from drives developed in the ore between two levels Ore is then blasted using a charge that occupies a relatively short length of the hole, some distance from the bottom face The method has a low explosive consumption The ....

mining method retreat
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Vertical crater retreat - QueensMineDesignWiki 2019-6-28 Vertical crater retreat VCR , also known as Vertical retreat mining, is an open stoping, bottom-up mi...

PDF Underground mining Methods
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Underground Mining Methods Soft rock Mining Methods Blast mining Shortwall mining Coal Skimming or Sink and Fl oat method Hard rock Mining Methods Stoping 1 Room and pillar 2 Bench and ....

PDF Shrinkage stoping and Vertical Crater Retreat stoping
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Shrinkage stoping Ascending method of mining Advantages and Disadvantages Vertical Crater Retreat stoping Introduction Application Developmental sequence of stopes ....

Vertical crater retreat mining in the Sudbury Basin ,
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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 hol...

Vertical Crater Retreat
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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...

Vertical Crater Retreat
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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 opening...

Crater Blasting
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Crater blasting is a method of blasting used in an underground mining method called Vertical Crater Retreat VCR Explosive charges are placed in large diameter holes and fired The concentrated, spherical charge is positioned at a specified distance from the horizontal free surface underneath and the detonation creates crater-shaped openings in the rock...

VCR Method_2018pdf
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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 ,...

Types of Mining Methods Sell Side Handbook
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11-03-2018 0183 32 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 ore bodi...

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