Vertical Crater Retreat Mining 347 views Scribdlongitudinal retreat mining method greenrevolutionorgin

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 VCR is based on the crater 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

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ctufrgsbrDesign and Application of Sublevel Stoping Methods

Underground Mining Methods and Applications FIGURE 13 Post room and pillar mining mined out Numbers indicate sequence of extraction FIGURE 14 Step room mining of inclined orebody Deposits with large vertical heights are mined in slic Mining starts at 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

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Drop Raising in Mining VCR Method copper mining India Geotechnical aspects of vertical crater mining method in a

Drop Raising in Mining VCR Method Vertical crater retreat VCR also known as vertical retreat mining VRM reduces the cost of mining wide steeply orebodi The stope has a similar shape but instead of small longholes drilled in fans large blastholes are drilled vertically from a top sill to break through into a bottom sill on the 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 retreat mining in the Sudbury Basin Vertical Crater Retreat Mining in the Sudbury Basin AusIMM

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 miningFaced 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 hol The orebody is mined

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Underground Mine Design Test 1 Flashcards QuizletView source for Vertical crater retreat QueensMineDesignWiki

1 Wedge attached to the bolt shank is pulled into a conical anchor shell forcing it to expand against the drillhole walls 2 Grout injected into collar end of hole and return pipe is extended for length of the hole 3 Grouting stops when air is displaced and grout flows from return tubeView source for Vertical crater retreat From QueensMineDesignWiki ← Vertical crater retreat Jump to navigation search You do not have permission to edit this page for the following reason The action you have requested is limited to users in one of the groups Users approved

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Mining method evaluation and dilution control in Kittilä mineView source for Vertical crater retreat QueensMineDesignWiki

preliminary method selection with traditional mining method selection tools This yielded several methods which applicability for Kittilä mine was assessed by terms of safety suitability production dilution recovery and flexibility Preliminary selection was followed by stope design where numerical and empirical methods were used toYou do not have permission to edit this page for the following reason

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PDF Underground mining Methods ResearchGatePOSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH

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

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Vertical crater retreat a new mining method Book Vertical retreat mining Britannica

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 DataIn mining Blasthole stoping In vertical retreat mining the stope does not take the shape of a vertical slot Instead the trough serves as a horizontal slot and only short lengths at the bottoms of the blastholes are charged with explosives blowing a horizontal slice of ore downward into the

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Vertical Crater Retreat Mining Method nnguniclubcozaResearch Study on Pillar Design for Vertical Crater

vertical crater retreat mining method Grinding Mill Vertical Crater Retreat Stoping as Applied at the Homestake 28 Jul Therefore the feasibility of applying the VCR stoping method at the Homestake Mine was explored Vertical Crater Retreat stoping is a recent innovation in large scale underground mining based on CW ivingston scraterLarge 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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Geotechnical aspects of vertical crater mining method in a Vertical retreat mining Britannica

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 environmentIn mining Blasthole stoping In vertical retreat mining the stope does not take the shape of a vertical slot Instead the trough serves as a horizontal slot and only short lengths at the bottoms of the blastholes are charged with explosives blowing a horizontal slice of ore downward into the

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Vertical crater retreat a new mining method Book MINING 324 SYLLABUS Explosives Engineering

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 DataMINING 324 SYLLABUS FS11 Underground Mining Methods and Equipment Instructor Richard L Bullock D Eng PE QP 217 Sunset Drive Longview WA I COURSE DESCRIPTION Principles utilized to develop metallic coal and industrial mineral deposits into productive entities using underground mining methods

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