vertical crater retreat mining method

vertical crater retreat mining method - pickbus.in

vertical crater retreat mining method. Home > Project Case > vertical crater retreat mining method. Help Save Wildlife - World Animal Foundation. Help Save Wildlife. By 2025 as many as one fifth of all animal species may be lost, gone forever. In recent times, hundreds of species have become extinct as a result of human activities:

Vertical Crater Retreat (VCR) con relleno by Vanessa ...

"Homestake Mining Company South Dakota" año 1981 Ventajas *Durante la carga del mineral la ventilación no es buena, debiéndose utilizar ventilación secundaria.

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 ...

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

Discuss the geology, geometry and rock strength issues applicable to the vertical crater retreat mining method. (3 marks) Underground Mining Methods and Design 09-Mmp-A2 May 2015 Page 3 of 13 Question 1.3 (7 marks) answer compulsory 1.3 General mine ventilation question. (7 marks)

Vertical Crater Retreat | Mining | Nature - Scribd

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

MINING 324 SYLLABUS - Explosives Engineering

entities using underground mining methods. For underground mining, includes selection of mining methods, mine planning, economics, safety and overall operational considerations.

URE video archive - YouTube

Welcome to the official Atlas Copco YouTube channel for underground movies. The movies cover everything concerning mining and construction products and appli...

vertical crater retreat mining method vcr - eurotrak.eu

CRATER RETREAT MINING BY: SUJAN DALBEHERA DEVGAN SINGH ABHAYA MISHRA 1 VCR MINING Vertical crater retreat (VCR) mining is a method originally ... Vertical crater retreat - QueensMineDesignWiki Vertical crater retreat (VCR), also known as Vertical retreat mining…

Major Mines & Projects | Morro Agudo Mine

Vertical Crater Retreat; Room-and-pillar; Summary: The primary extraction method at the Morro Agudo Mine is inclined room-and-pillar. The mineralized zones are accessed via a ramp system that is developed in the hanging wall of the deposit. ... The proposed mine plan envisages a bulk mining operation with two mining methods: vertical retreat ...

Vertical Retreatment Mining Method - mayukhportfolio.co.in

Vertical Crater Retreat - RitchieWiki. 20 Oct 2009 ... Vertical crater retreat is a beneficial mining method because it reduces the cost of mining orebodies that are wide and steep.

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.

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

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.

Vertical Crater Retreat - RitchieWiki

Vertical crater retreat 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 because miners do not have to be in …

Vertical crater retreat mining in the Sudbury Basin ...

VERTICAL CRATER RETREAT MINING IN THE SUDBURY BASIN Vertical crater retreat mining History The vertical crater retreat mining method is based on C.W. Livingston's crater blasting theories and was developed by Inco and CIL Inc. [14].

Rock Mechanics Study of Shaft Stability and Pillar Mining ...

mechanized cut-and-fill and vertical crater retreat. occurred. Pillar mining began below the 3650 level in late 1988. Shortly Although only a small tonnage of ore in the shaft pillar had

vertical crater retreat mining method - abwasseranlagen.eu

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.

The Blasting Test and Blasting Vibration Monitoring of ...

ORIGINAL PAPER The Blasting Test and Blasting Vibration Monitoring of Vertical Crater Retreat Mining Method in the Luohe Iron Mine Zhenbin Rao . Sijing Cai

vertical crater retreat mining method vcr - vojtech-czobor.eu

vertical crater retreat mining method – Grinding Mill China. Vertical Crater Retreat Stoping as Applied at the Homestake, 28 Jul 2012, 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'scrater.

POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH ...

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

Vertical Crater Retreat | Mining | Industries - Scribd

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 …

Underground mining techniques - Universidade Federal do ...

Deposits with large vertical heights are mined in slices. Mining starts at the top below the hanging wall. At this stage, rock bolts are installed for roof control with the back at a conve- nient height. Sections below are recovered in one or more steps ... Underground Mining Methods and Applications .

Notes on Vertical Crater Retreat Method - Google Sites

Notes on Vertical Crater Retreat Method ... mining rate Case Studies Falconbridge Nickel Mines - used for rib pillar recovery (before VCR was employed, cut and fill, and sub-level stoping were employed for pillar recovery) - each pillar is 107-122 m long, 61 m high and 6.7 m wide.

vertical crater borehole mining method - mountainboards.co.za

Vertical crater retreat mining method. Empirical open stope design in Canada UBC Library Open . Oct 18, 2010 8 2.1 INTRODUCTION 8 2.1.1 D e f i n i t i o n of open stope mining . . Cross section of the v e r t i c a l crater retreat 50 method used i n blasthole open An inspection of the fractures at the t e s t horizon using a borehole.

Techniques in Underground Mining - ILO Encyclopaedia

Techniques in Underground Mining ... Vertical crater retreat mining. Like sublevel stoping and shrinkage stoping, vertical crater retreat (VCR) mining is applicable to mineralization in steeply dipping strata. ... It qualifies as a safe mining method because the …

Geotechnical aspects of vertical crater mining method in a ...

Geotechnical aspects of vertical crater mining method in a deep mine S. C. Goel Zambia Consolidated Copper Mines Ltd, Zambia SYNOPSIS Vertical Crater Retreat is compared to other open

Vertical crater retreat - QueensMineDesignWiki

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 orebody from the top, and then blasting horizontal slices of the orebody into an undercut.

Blasting in High Production UG Metal Mines workings ...

Aug 04, 2011· Mining and Blasting ... Technical Papers; August 4, 2011 by PARTHA DAS SHARMA. Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method. View this document on Scribd. Advertisements. Like this: ... ← Tunnel Construction Methods …

Shrinkage and Vertical Crater Retreat Stoping - SlideShare

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 …

Vertical Crater Retreat - [DOC Document]

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…

vertical crater retreat (VCR) – Mining and Blasting

vertical crater retreat (VCR) August 4, 2011 by PARTHA DAS SHARMA. Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method. View this document on Scribd. ... explosives, mining | Tagged blasting in underground metal mines, underground metal mines, vertical crater retreat (VCR) | Leave a comment.

vrm vertical crater retreat – Grinding Mill China

Vertical Crater Retreat: an Important New Mining … Document Summary for "Vertical Crater Retreat: an Important New Mining Method" » Learn More vertical rotary grinder