sublevel open stoping

  • Ebook Geotechnical Design For Sublevel Open Stoping

    Geotechnical Design For Sublevel Open Stoping Top results of your surfing Geotechnical Design For Sublevel Open Stoping Start Download Portable Document Format (PDF) and E-books (Electronic Books) Free Online Rating News 2016/2017 is books that can provide inspiration, insight, knowledge to

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  • Evaluation and Selection of Recoverable Reserves in a

    open pit and underground mining operations are concern (such as sublevel stoping). For the same tonnage, grades are lower, while for the same grades tonnages decrease. However, a procedure can be envisaged for use in the design stage to calculate the reserves recoverable from an

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  • sublevel stoping

    For sublevel stoping the ore body and walls should be strong enough to support open stoping In this method, the ore is excavated in open stopes, retreating . Live Chat There are a number of variations on blasthole stoping In sublevel stoping, shorter blastholes are drilled from sublevels located at shorter vertical intervals along .

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  • Sublevel open stoping : design of the O640, L651 and

    The main objective is to give the reader an understanding into sub-level open stoping and the design process followed. The objective here is to present a design methodology applicable to sublevel open stoping, but also to then bridge the gap between theory and practice by applying said methodology to an actual design example.

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  • Economic Comparison of Drilling Systems in Sublevel

    Ring drilling and parallel drilling are two main drilling systems in sublevel stoping which have high level productivity. In figure 1 a schematic illustration of ring drilling pattern has been demonstrated in an open stope ('see figure 1.A'). In this style of production drilling, blast holes are

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  • Underground mining (hard rock)

    Underground mining (hard rock) Jump to navigation Jump to search. A three An orebody hosted in strong self-supporting rock may be mined by an open stoping method and an orebody hosted in poor rock may need to be mined by a cut and fill method where the void is

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  • sub level stoping

    Sublevel stoping, sublevel caving, top-slicing, and block-caving require more stope preparation before ore extraction can begin In sublevel stoping (a form of open . Inquiry; Sublevel - definition of sublevel by The Free Dictionary. sublevel (ˈsʌbˌlɛvəl) n a level between other levels in a mine Want to thank TFD for its existence?

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  • sub level stoping

    Design and Application of Sublevel Stoping Methods, 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. Get Info

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  • Sublevel Stoping Flashcards

    upscaled variant of sublevel open stoping, using longer blastholes with larger diameter hole diameters ranging from 4 to 7 inches, drilled with Down the Hole hammer Hole depths may reach 150 - 200 ft larger holes are reported to provide improved fragmentation

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  • sublevel stoping mining method

    SUB-LEVEL OPEN STOPING: DESIGN OF THE O640, L651, sub-level open stoping and the design process followed The objective here is to present a design methodology applicable to sublevel open stoping, but also to then bridge the gap between theory and practice by applying said methodology to an actual design example

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  • (PDF) Sublevel Stoping Underground Mining Methods

    Sublevel Stoping Underground Mining Methods. Sublevel open stoping: design of the O640, L651 and N 659 sub level open. stopes in the 3000 orebod y of the Mount Isa copper mines, Queensland, Australia. Department of Mining, University of Pretoria. Prof. Dr. H.Z. Harraz Presentation

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  • transverse sub level open stoping

    transverse sub level open stoping - villa-dante . transverse sub level open stoping. sublevel open stoping – Grinding Mill China. sublevel open stoping: design of the O640, L651 and N659 sub-level open stopes in the 3000 orebody of the Mount ISA copper mines, Queensland, Australia Learn More Monitoring open stope caving at Goldex Mine.

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  • Case Study Minimising Dilution and Improving Fragmentation

    Junction's longhole opening stoping practices than the ANFO based products. This has been highlighted by results which included: 1. 56.9% dilution reduction for bulk Subtek™ Velcro emulsion vs ANFO based products 2. Improved fragmentation

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  • Considerations for Sublevel Open Stoping

    Sublevel stoping is not dependent on the width of the ore body. Widths of less than 6 m (20 ft), however, make the utilization of long-hole drilling techniques more difficult. The main criteria for sublevel open stoping are competent ore and stable host rock, regular ore boundaries, and a footwall dip that exceeds the angle of repose of broken ore.

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  • Geotechnical Design for Sublevel Open Stoping

    Geotechnical Design for Sublevel Open Stoping - CRC Press Book. The first comprehensive work on one of the most important underground mining methods worldwide, Geotechnical Design for Sublevel Open Stoping presents topics according to the conventional sublevel stoping process used by most mining houses, in which a sublevel stoping geometry is

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  • Stoping Mining Methods

    In the sublevel variation of open stoping, the stope faces retreat from the end of the ore body or stope limit longitudinally or (where the stopes are run across the lode) from one of its walls. The miners are always working under solid backs and have a safe avenue of

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  • Sublevel Open Stoping Mining Method

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  • Sublevel stoping..Underground mining methods

    Sublevel stoping..Underground mining methods 1. Hassan Z. Harraz hharraz2006yahoo 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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  • Geotechnical Design for Sublevel Open Stoping: 1st

    1-4-2014The first comprehensive work on one of the most important underground mining methods worldwide, Geotechnical Design for Sublevel Open Stoping presents topics according to the conventional sublevel stoping process used by most mining houses, in which a sublevel stoping geometry is chosen for a

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  • Sublevel retreat mining in the subarctic: a case study of

    Unlike sublevel open benching, blasts are only mucked until cracked to the surface, leaving a blanket of ore to protect against air blasts and rockfalls from the surface (Jakubec et al. 2004). A drawpoint is considered to be cracked once the muck pile no longer touches the brow, leaving the underground drift open to the pit above.

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  • sub level stoping

    Sublevel stoping, sublevel caving, top-slicing, and block-caving require more stope preparation before ore extraction can begin. In sublevel stoping (a form of open stoping), ore chutes, manway, and starting raises must be put up and one or more drifts driven on each sublevel (fig. 60, B).

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  • Sublevel open stoping hanging wall instrumentation

    Cite As: Carswell, JF, Player, J, de Vries, R Hassell, R 2015, 'Sublevel open stoping hanging wall instrumentation program at the Dugald River underground mine', in PM Dight (ed.), Proceedings of the Ninth Symposium on Field Measurements in Geomechanics, Australian Centre for

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  • Sublevel Stoping

    Sublevel open stoping: design of the O640, L651 and N659 sublevel open stopes in the 3000 orebody of the Mount Isa copper mines, Queensland, Australia. Department of Mining, University of Pretoria. Prof. Dr. H.Z. Harraz Presentation sublevel stoping 28. Configuration of stopes To

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  • Mining

    Mining - Mining - Blasthole stoping: When the dip of a deposit is steep (greater than about 55), ore and waste strong, ore boundaries regular, and the deposit relatively thick, a system called blasthole stoping is used. A drift is driven along the bottom of the ore body, and this is eventually enlarged into the shape of a trough. At the end

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