vertical crater retreat mining method

  • Sub Level CavingYouTube

    Mar 22, 2007· A method of underground mining operation. Best Toys for 2019Toy Fair New York 2019 Best in ShowDuration: 15:27. US Japan Fam Recommended for you

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  • Vertical Crater Retreat Mining in the Sudbury BasinAusIMM

    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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  • 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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  • 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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  • Mining Methods FlashcardsQuizlet

    Start studying Mining Methods. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. Crater retreat stoping. a method of stope mining that allows for extraction of vertical deposits surrounded by incompetent rock mass (rock that cannot support itself)

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  • Underground mining (hard rock)Wikipedia

    VRM/ VCR: Vertical retreat mining (VRM) also known as Vertical crater retreat (VCR) is a method where mine is divided in vertical zones [clarification needed] with depth of about 50 meters using open stoping, bottom up mining.

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  • Underground mining (hard rock)Wikipedia

    VRM/ VCR: Vertical retreat mining (VRM) also known as Vertical crater retreat (VCR) is a method where mine is divided in vertical zones [clarification needed] with depth of about 50 meters using open stoping, bottom up mining.

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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

    Live Chat
  • 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

    Live Chat
  • Vertical Crater Retreat.pdfChapter 11 Vertical Crater

    Vertical Crater Retreat: an Important New Mining Method L.C. 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

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  • Shrinkage and Vertical Crater Retreat Stoping

    Oct 23, 2014· Shrinkage and Vertical Crater Retreat Stoping 1. Hassan Z. Harraz [email protected] 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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  • MINING 324 SYLLABUSExplosives Engineering

    MINING 324 SYLLABUS FS11 Underground Mining Methods and Equipment. Instructor: Richard L. Bullock, D. Eng., P.E., Q.P. 217 Sunset Drive, Longview, WA I. COURSE DESCRIPTION Principles utilized to develop metallic, coal and industrial mineral deposits into productive entities using underground mining

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  • longitudinal retreat mining methodgreenrevolution .in

    Eagle Mine215 Кб. This method provides the cost advantages of bulk mining, while maintaining a degree of selectivity and operational flexibility. The majority of the stopes will be mined as transverse bench and fill stopes, with some thinner thickness zones of the orebody mined as longitudinal retreat stopes.

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  • 12. Mining methods and method selection

    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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  • 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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  • Baselining Vertical Retreat Mining as a Mining Method

    Baselining Vertical Retreat Mining as a Mining Method Baselining a Mining MethodVertical Crater Retreat (VRM) Baselining a process is not an easy task. One must get down on the ground floor and document process structure from start to finish. A convenient method for representing a process and all of its components is simple flowcharting.

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  • Types of Mining MethodsSell Side Handbook

    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 bodies.

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  • Vertical Crater RetreatMiningNature

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

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  • Vertical crater retreat : a new mining method (Book, 1979

    Add tags for "Vertical crater retreat : a new mining method". Be the first. Similar Items. Related Subjects: (1) Mining engineering. Confirm this request. You may have already requested this item. Please select Ok if you would like to proceed with this request anyway. Linked Data.

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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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  • Vertical crater retreatQueensMineDesignWiki

  • Vertical Crater Retreat (VCR): Underground Mine Design

    Mining and Minerals Engineering: University: ia Polytechnic Institute And State University 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 & Definitions Hide All 7

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  • 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.

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  • POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH

    3.3. Vertical crater retreat mining methodVCR 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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  • Definition of vertical crater retreatmindat 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 procedures.

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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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  • 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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  • Vertical Crater Retreat.pdfEconomic GeologyMining

    Chapter 11. Vertical Crater Retreat: an Important New Mining Method L.C. LANG. INTRODUC'I'ION the standard uphole method was used to blast down the The introduction of 165 mm (6% in.) holes to 18 m (60 ft) long section of waste from the bottom underground mining operations has made possible the of the ore into the undercut. application of Canadian Industries Ltd's (CIL) vertical From the

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  • Definition of vertical crater retreatmindat 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 procedures.

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  • 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.

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  • vertical crater retreat (VCR) Mining and Blasting

    Aug 04, 2011· Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA. Vertical Crater Retreat (VCR) method. View this document on Scribd. Posted in blasting, explosives, miningTagged blasting in underground metal mines, underground metal mines, vertical crater retreat

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  • Shrinkage stoping Vertical Crater Retreat stoping

    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

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  • Vertical Crater Retreat Mining Methodgreenrevolution .in

    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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  • (PDF) Underground mining MethodsResearchGate

    Shrinkage stoping Ascending method of mining Advantages and Disadvantages Vertical Crater Retreat stoping Introduction Application Developmental sequence of stopes Production How Cratering Works

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  • Vertical Crater Retreat (VCR): Underground Mine Design

    Mining and Minerals Engineering: University: ia Polytechnic Institute And State University 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 & Definitions Hide All 7

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  • 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.

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  • AbstractUSGS

    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 valid.for operations with daily mining capacities of 100 to 6,000 st/d.

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