sub level retreat mining method

Mining method evaluation and dilution …

level designs were used to create mining scenarios for the deeper, undeveloped parts of the mine. These scenarios were finally compared economically to find the most cost These scenarios were finally compared economically to find the most cost

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REGISTRATION BROCHURE Mining companies …

Sublevel retreat mining in the subarctic: a case study of the Diavik Diamond Mine PA Lewis, LM Clark, SJ Rowles, CP Auld, CM Petryshen, AP Elderkin, Rio Tinto, Canada Evaluation of caving as mining method for the Udachnaya underground diamond mine project M Tishkov, M Vishnevskaya, ALROSA PJSC, Russia

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Sublevel Caving Technique | Mining | Economic …

Sublevel Caving Technique - Free download as PDF File (.pdf) or read online for free. An underground mining method used in large, steeply dipping orebodies where the wall rock is of an incompetent nature. Parallel drives are developed in the ore on equally spaced levels. The ore is then drilled and blasted using longholes between levels, often in a circular or fan pattern, on retreat.

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Stoping Mining Methods - Metallurgist & Mineral …

The method is similar in some respects to sublevel caving—the ore is mined from the top downward by a series of slices, and the overlying strata cave and follow the mining downward with a mat intervening between the caved overburden and the ore beneath. The methods differ, however, in that in top slicing the slice is mined right up to the ...

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Caving Underground Mining Methods (longwall, Sublevel ...

Caving Underground Mining Methods (longwall, Sublevel caving, & Block caving) 1. 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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Topic - Sublevel Retreat Mining Methods

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Backfill - Welcome to the Narrow-Vein Mining …

Primary Mining Method Sub-Level Longhole retreat. Information. Waste rock generated from development is dumped in the mined out open stopes.

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sub level mining process701 - .za

Sub Level Retreat mining > Etagenbruchbau - English term or phrase: Sub Level Retreat mining : Their preliminary mine design is based on dimensional models of the mineralized lenses that were used to ...

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Paper Sub Level Stoping | Economic Geology | Mining

This chapter 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 mining, transverse stoping, Avoca, longitudinal, and other less-used methods such as slusher mining …

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Caving Underground Mining Methods (longwall, Sublevel ...

Caving Underground Mining Methods (longwall, Sublevel caving, & Block caving) 1. 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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Shortwall stoping versus sub-level longwall …

Current longwall mining method applied in the mine The current method used in the above-mentioned mines is a sub-level longwall caving-retreat method. In this method…

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sub level retreat mining method

Current longwall mining method applied in the mine The current method used in the above-mentioned mines is a sub-level longwall caving-retreat method. In this method, the face is formed perpendicular to the seam strike and …

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Guyana Goldfields Announces Strategic Plans for …

Sub-level Retreat Scoping Study The Company has commissioned SRK (Vancouver) to complete a separate scoping study for sub-level retreat ("SLR") underground mining method for Rory's Knoll, which is due to be completed in Q2 2012.

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New Note Funding to Rapidly Pursue Growth …

Implementation of the Sub-Level Retreat (SLR) mining method is expected to cost approximately US$1.15 million in additional capital expenditure. The new method will lift mechanisation levels and is expected to deliver a substantial reduction in

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Underground Diamond Mining at Ekati and …

used method in Canadian underground operations, sub-level retreat was newly introduced to Canada; hence, this paper will focus on SLR, mining method. The decision to select sub-level retreat was made

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Underground mining techniques - …

CHAPTER 1 Underground Mining Methods and Applications Production Headframe Hans Hamrin* 1.1 INTRODUCTION Ore is an economic concept. …

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Shortwall stoping versus sub-level longwall …

Current longwall mining method applied in the mine The current method used in the above-mentioned mines is a sub-level longwall caving-retreat method. In this method, the face is formed perpendicular to the seam strike and implemented in the form of slices 7.5 m thick from the top downwards (Figure 1). Because the geotechnical properties of …

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Stoping - Wikipedia

Long hole stoping is a highly selective and productive method of mining and can cater for varying ore thicknesses and dips (0 - 90 degree). It differs from manual methods such as timbered and shrinkage as once the stope has begun blasting phase it cannot be accessed by personnel. For this reason the blasted rock is designed to fall into a ...

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Mining - Underground mining |

Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton …

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Frontier Diamonds is close to reaching its diamond mining …

Sub Level Retreat Mining is a method of underground mining that involves vertical mining in a large, open stope (level) that has been created inside an ore vein. High quality stones dug up from Fronter's Sedibeng diamond mine in March. Pic: Frontier

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4. History of underground mining - SAIMM

As the mines moved deeper and technology improved the mines employed sub­ level caving and vertical crater retreat mining methods with varying degrees of success, but returned to block caving using scrapers by the 1990's. Mining the Premier pipe as an open pit started in 1902. The pit was closed in 1932 at a depth of 189 metres. In 1947 …

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Description of mining methods (step by step) - …

Primary Mining Method Sub-Level Longhole retreat. Information. DEVELOPMENT SEQUENCE The Diamond hill ore bodies and mine workings are in exceptionally solid unfractured rock and accordingly are amenable to …

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Sub-level open stoping - QueensMineDesignWiki

In general this method is fairly safe as the mining tends to retreat away from previously mined or unsupported areas. Also local ground support can be applied in areas where workers are expected to go as safety measure, though remote equipment such as LHD's can travel in unsupported areas.

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Design and Application of Sublevel Stoping Methods ...

Introduction. 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).

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mechanised continuous retreat mining method pdf

Primary Mining Method Sub-Level Longhole retreat. Information DEVELOPMENT SEQUENCE The Diamond hill ore bodies and mine workings are in exceptionally solid unfractured rock and accordingly are amenable to low cost sublevel open stoping methods. Ore is ...

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