vertical crater retreat mining method vcr

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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...

longitudinal retreat mining method - greenrevolutionorgin

Drop Raising in Mining (VCR) Method - copper mining India (1980-2009) Metalliferous Mines and Mining Methods Mechanized Under Ground Mining and Mechanized Open Cast MiningVertical crater retreat (VCR), also known as vertical retreat mining (VRM), reduces the cost of mining wide, steeply orebodi Read more...

Chimenea en VCR primeros Tips antes de cargar el explosivo ,

Nov 12, 2017· Primeras importantes indicaciones antes de cargar el explosivo en una chimenea de minería subterránea con método de cráter vertical en retroceso...

Vertical crater retreat mining in the Sudbury Basin ,

VCR has gradually supplanted other mining methods until today about three- quarters of the Sudbury output is obtained using VCR VERTICAL CRATER RETREAT MINING IN THE SUDBURY BASIN Vertical crater retreat mining History The vertical crater retreat mining method is based on CW Livingston's crater blasting theories and was developed by Inco and ....

Research Study on Pillar Design for Vertical Crater ,

Large-diameter (6 1/2 in) blastholes were an integral part of the stoping method at each mine 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 ....

VERTICAL CRATER RETREATpptx | Mining | Geology

CASE STUDY ON VERTICAL CRATER RETREAT MINING BY: SUJAN DALBEHERA DEVGAN SINGH 1 ABHAYA MISHRA 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...

POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH ,

33 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 ....

The Blasting Test and Blasting Vibration Monitoring of ,

In order to ensure the safety of the residence and the underground tunnel cavern within the mobile belt of the underground mining, the Luohe iron mine did the blasting test on the vertical crater retreat mining method and blasting vibration monitoring The blasting experiments use common emulsified oil explosives and non-electric initiation system...

MASTER'S THESIS

at 25 years The mining method used for production at Mindola Shaft is a variation of sublevel stoping known as the Vertical Crater Retreat (VCR) method The ore body in Mindola is on average 12 meters wide with dip varying from 56° to 72°, the ore is extracted in stopes and backfilling is employed...

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

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 An offshoot of this mining method is the VCR drop-raising technique that employs the same spherical crater charge technology as VCR method9, 10 This ....

Abstract - USGS

This method is not as popular as it once was Sublevel stoping, vertical crater retreat (VCR), sublevel caving, and cut-and-fill are all methods that can be applied to ore bodies where shrinkage stoping is feasible The model is valfor operations with daily mining capacities of 100 to 6,000 st/d...

Lecture 4: Underground Mining

Nov 02, 2011· 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 ....

Definition of vertical crater retreat - mindatorg glossary

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 procedur...

Vertical Crater Retreat Mining Method - greenrevolutionorgin

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...

Vertical Crater Retreatpdf - Chapter 11 Vertical Crater ,

Vertical Crater Retreat: an Important New Mining Method LC LANG INTRODUC'I'ION The introduction of 165-mm (6% -in) holes to underground mining operations has made possible the application of Canadian Industries Ltd's (CIL) vertical crater retreat (VCR) mining method, illustrated in the accompanying sketch...

Shock and Vibration - Hindawi Publishing Corporation

For limiting the damage range caused by explosive shock loads in vertical crater retreat (VCR) mining, the blasting damage characteristics of surrounding rock were studied by two methods: numerical simulation and ultrasonic testing Combined with the mining blasting in Dongguashan Copper Mine of China, the VCR blasting shock characteristics under different conditions are obtained by using LSDYNA...

Underground Mining - MAFIADOCCOM

Topic 9: Mining Methods Part V- Underground Mining Hassan Z Harraz [email protected] 2010- 2011 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...

(PDF) Shrinkage stoping and Vertical Crater Retreat stoping

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, leading them to the base of ....

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 ,...

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

cycle of operations utilizing the vertical crater retreat (VCR) method of mining Clearly show examples of the following in your sketch, "raise", ~~S~Ot~~ and "stope" 32 In VCR, the term "crater" is used with reference to the work of CW Livingston Describe how the drilling, explosive loading and blasting cycle in practical VCR mining...

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...

Vertical Crater Retreatpdf - Chapter 11 Vertical Crater ,

Vertical Crater Retreat: an Important New Mining Method LC LANG INTRODUC'I'ION The introduction of 165-mm (6% -in) holes to underground mining operations has made possible the application of Canadian Industries Ltd's (CIL) vertical crater retreat (VCR) mining method, illustrated in the accompanying sketch...

Vertical Crater Retreat (VCR): Underground Mine Design ,

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 ....

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 ....

Vertical Crater Retreat (VCR) con relleno by Vanessa ,

* Medida inicial de los barrenos * Tapar / sellar el fondo de los barrenos * Cebado y carguío de los barrenos * Medida de altura de la carga * Sellado superior * Conexión al tren de encendido en el nivel superior *Se fundamenta en la teoría de cráteres de C Livingston...

Edumine | Design and Application of Sublevel Stoping Methods

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) Variations of this method include vein (Alimak) mining, transverse stoping, Avoca and longitudinal mining Sublevel stoping accounts for more than 60% of all ....

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...

Longitudinal Retreat Mining Method

vertical crater retreat mining method longitudinal retreat mining method - 161 LONGHOLE LONGITUDINAL RETREAT MINING METHOD The mining This mine utilised an early version of the vertical crater retreat mining method that was Get Price And Support Online; Sublevel Caving Technique | Mining | Economic Geology...

mining engineering: Mining Methods

Aug 28, 2010· A few of the underground mining methods, such as, Avoca? and Vertical Crater Retreat (VCR?), have been patented resulting in new names for variations (Modified Avoca and Modified VCR) Moreover, different names are often applied to the same mining method (Blasthole Stoping and Longhole Open Stoping are frequently used to refer to the same ....

Muliyunda Ilishebo - Mining Engineer optimization Graduate ,

Drilling of long hole in production stopes using cubex machines using a VCR mining method (Vertical crater retreat) Air balancing for ventilation Preparation of eucalyptus census...