vertical crater retreat mining method 17097

  • Vertical crater retreat

    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

  • 8.3.2: Shrinkage Stoping | ABC 123: Testing Site / Course

    The variant is known as the vertical crater retreat (VCR) mining method. It was invented by mining engineers working in the nickel mines in Canada. The company, INCO or International Nickel Company as it was known, obtained a patent on the method, and until the patent expired near the end of the 20th century, INCO had exclusive use of this new method.

  • Vertical Crater Retreat Mining Method

    Vertical crater retreat mining method vcr vertical crater retreat method applies to orebodies with steep dip and petent 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

  • 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.

  • Plastic limit bearing calculation of blasting-roof in deep …

     · In other countries, deep hole mining is widely used due to its high efficiency and safety []. This approach, specifically the Vertical Crater Retreat (VCR) mining method, was introduced in China in the 1980s. After decades of development, the VCR method has

  • Mopani Copper Mines

    Vertical crater retreat is the predominant mining method while sublevel open-stopping and sublevel caving methods are also used. [26] In April 2011 Mopani announced its intentions to sink a new $295 million shaft at Mufulira, this should extend the life of the mine by some twenty-five years. [27]

  • 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-Use of

  • Crater Blasting

    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.

  • Vertical Crater Retreat | Mining | Science

    f 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.

  • 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.

  • Geotechnical factors

    Artificially supported methods include bench-and-fill stoping, cut-and-fill stoping, shrink stoping, and vertical crater retreat (VCR). Cut-and-Fill Mining Cut-and-fill mining is a very versatile method that can be adapted to an orebody with any shape (Bullock and Hustrulid, 2001).

  • (PDF) UNDERGROUND MINING METHODS | Timileyin …

    There are several methods for bulk underground mining, the most common being block caving, long hole open stoping, sublevel open stoping, sublevel caving and vertical-crater-retreat. 2.2.1 Block Caving Block caving is a large-scale production technique applicable to homogeneous ore bodies of large dimensions and most commonly steep to vertical ore bodies.

  • VCR Method_2018.pdf

    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 in mining steeply dipping narrow to medium large deposits where the country rock and ore are strong and competent and can stand unsupported …

  • A new model for mining method T selection of mineral deposit …

    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

  • 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 | Mining | Science

    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.

  • Baselining Vertical Retreat Mining as a Mining Method

    VRM is a contraction of "Vertical Retreat Mining", however it has other names as well - as sophisticated as "Vertical Crater Retreat" or "VCR" or simply called "Inverted Crater Blasting". In 1983, it was called "an achievement of the last decade and is practiced in mines in …

  • The Best Methods for Underground Mining

     · The vertical crater retreat mining method is also known as VCR mining. This mining method precipitously dips strata for mineralization. This method blasts rocks with total and heavy charges with a large diameter of 165 mm. VCR''s blasting creates a cone-shaped opening in the targeted rock mass to let the materials be mined quickly.

  • Vertical Crater Retreat Mining Method

    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.

  • 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

  • Longitudinal Retreat Mining Method

    Longitudinal Retreat Mining Method. 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.

  • vertical crater retreat (VCR) – Mining and Blasting

     · Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA Mining and Blasting Weblog of Partha Das Sharma For Discussing Various Aspects of Mining…

  • vertical crater retreat (VCR) – Mining and Blasting

     · Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method

  • Shrinkage and Vertical Crater Retreat Stoping

    Underground mining method; Shrinkage stoping, Ascending method of mining, Advantages and Disadvantages, Vertical Crater Retreat stoping, Introduction, Applica… LinkedIn emplea cookies para mejorar la funcionalidad y el rendimiento de nuestro sitio …

  • VCR_

    VCR(Vertical Crater Retreat mining method)[1-2],1974,,。

  • Definition of vertical crater retreat

    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. Ref: SME, 1. ii.

  • Shrinkage and Vertical Crater Retreat Stoping

     · The method progresses vertically, as successive slices of ore are detonated. Vertical Crater Retreat (VCR) uses parallel, vertical, descending and spherical concentrated loads to fragment the ore (disassemble by cratering) drilling; The advance of the stope is

  • Mining Intelligence and News

    Summary: Mining at Rajpura Dariba commenced in 1983 and is carried out using the vertical crater retreat method and blasting hole mining method with mined out stopes backfilled with cemented classified mill tailings. In certain areas the ground conditions adversely affect slope stability and dilution.

  • Mining Intelligence and News

    Mining Method Sub-level open stoping (SLOS) Vertical Crater Retreat Processing Electric furnace Heap leach Counter current decantation (CCD) Agitated tank (VAT) leaching Carbon in column (CIC) AARL elution Merrill–Crowe Solvent Extraction & Electrowinning

  • The Blasting Test and Blasting Vibration Monitoring of …

     · Because the land requisition and demolishing became difficult more and more, the mining scheme of Luohe iron mine was changed from caving method to filling method. 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 …

  • Stability of stope structure under different mining methods

    continuous mining technology, filling mining t echnology, VCR (Vertical Crater Retreat Method) technology, and caving mining technology [4-6]. For example, T. M. Ermekovtakes [7] mine engineering obtains the key parts of pillar instability in the goaf and then3D

  • Quick Guide to Hard Rock Mining | An Underground Miner

     · These acronyms stand for vertical retreat mining, which also refers to vertical crater retreat (VCR). This mining method divides the mines into vertical zones having a depth of 50 meters using a bottom-up mining technique. After ore blasting occurs, retrieval will

  • Geotechnical aspects of vertical crater mining method in …

    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.

Free Consult  or  Leave Message

Copyright © ANC | Sitemap

gotop