longitudinal retreat mining method

    Operations, Two mining methods are used at LaRonde: longitudinal retreat with cemented rock or paste backfill; and transverse open stoping with cemented rock backfill, paste or unconsolidated backfill In addition, to address concerns regarding the frequency and intensity of seismic events encountered at the lower levels of the LaRonde mine, a hybrid of ,TROPICANA GOLD MINE, Mining: Conventional open cut and conventional mechanised underground mining methods Processing: Crushing, high-pressure grinding, ball mills, CIL Ore Reserve ()*: 657Mt grading 177g/t for 374Moz of contained gold Mineral Resource ()*: 1362Mt grading 176g/t for 770Moz of contained gold * As at 31 December 2018Factors influencing overbreak in narrow vein longitudinal ,, operation Narrow vein longitudinal retreating mining methods are especially susceptible to hanging wall and footwall dilution due to the wall overbreak Understanding the factors which influence the stability of these walls can help a mining engineer design stopes that minimize dilution(PDF) Underground mining Methods, 2) Room (Bor d)-and-Pillar mining (or con tinuous mining) method It is the most common supported pillar method, designed and used primarily for mining flat-lyingUS3712677A, A chamber mining technique whereby a series of horizontal slopes are formed between haulage and bleeder entri Upon completion of a crosscut, the top and sides are drilled and blasted in a retreat operation and the broken ore is hauled out The mined-out area need not be entered and there is no need for support or scaling since failure of walls between stopes will at no time endanger men and ,.

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    Alamos Gold, The primary mining method is longitudinal retreat long-hole stoping Ore is hauled by truck to the Kremzar mill located approximately 08 kilometres from the portal of the ramp The Phase III shaft expansion of the operation to 2,000 tpd is expected to be completed in 2025STILL DRAFTING PROJECT REAL 2, Oct 29, 2015· 11 Fig31 Longitudinal Retreat Mining Method (Source: AGA Mine Technical Services Dept) 323 Transverse Open Stoping This method is practiced in wide orebody with widths greater than fifteen meters A haulage drift is developed through waste and from it, at regular intervals of fifteen meters (15 m), transverse drifts (crosscuts) are driven ,Lapa Mining Method, Lapa Mining Method - 26m Longitudinal Retreat AGNICO EAGLE 42m Title: PowerPoint Presentation Author: George Dikho Created Date: 3/1/2013 10:26:46 AMTypes of Mining Methods | Sell Side Handbook, Mar 09, 2018· Selecting a Mining Method , Some common ones include longitudinal stoping, transverse longitudinal stoping, big-hole stoping, and vertical crater retreat Longitudinal stoping, also referred to as bench stoping or sublevel benching is a preferred method when the orebody is thin and narrow and steeply dipping and sheet-like Transverse ,Mining News, Access to production stopes is typically either transverse or longitudinal, with short longitudinal retreat utilized for reducing delays associated to rehabilitation and exposure to induced stress Historically, mining has been carried out using bottom-up LHOS methods, either in a pillarless or in a primary and secondary stope configuration.

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    UNDERGROUND MINING METHODS, Nov 10, 2017· Subject :GEOLOGYCourse :ENERGY RESOURCES AND MINERAL EXPLORATIONSKeyword : SWAYAMPRABHAMining Terms, Longitudinal Retreat Mining: A method of mining an orebody beginning at one stope and gradually mining new stopes towards the central ore-handling system Long-hole open stope: A method of mining involving the drilling of holes up to 90 feet long into an ore body and then blasting a slice of rock which falls into an open spaceWaterberg PGM Project, Bushveld ,, Three mining methods, including blind longitudinal retreat, transverse sub-level open stoping and longitudinal sub-level open stoping, have been shortlisted to conduct mining at the project The depth and the thickness of the mine will enable the implementation of low-cost mechanised underground mining methodslongitudinal 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 ,A long hole stoping system for mining narrow platinum reefs, A long hole stoping system for mining narrow platinum reefs Advantages of this mining method It allows for a low safety and health risk as well as improved working environment Physical work is reduced and it is easier to motivate the workforce Another advantage is the improvement in ,.

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    REVIEW OF FILL MINING TECHNOLOGY IN CANADA by KH ,, Also at INCO's Frood-Stobie Mine undercut-and-fill methods were developed in 1956 for mining broken-up rib pillars (5) In the early 1960's Falconbridge Nickel Mines Ltd adopted undercut-and-fill methods for recovering longitudinal pillars These methods soon replaced the more expensive and less efficient square set miningIsland Gold mine, Mining Methods: The primary mining method is longitudinal retreat long-hole stoping Ore is hauled by truck to the Kremzar mill located approximately 08 km from the portal of the ramp Processing Method:Vertical Crater Retreat Mining Method, Longitudinal retreat mining method samatourfr vertical crater retreat mining method 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 largescale underground miningEffect of delayed backfill on open stope mining methods ,, Longhole mining methods such as Avoca or longhole retreat as practiced at the Musselwhite mine of Placer Dome employs extraction with the use of fill walls to provide support to the adjacent stope Transverse open stoping also practiced at Musselwhite employs cemented rock fill ,Longitudinal longhole retreat, Longitudinal longhole retreat - QueensMineDesignWiki.

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    Gwalia Gold Mine ~ Mining Geology, Jun 04, 2015· The primary mining method since resumption of underground production in 2008 is a Longhole Open Stoping method with paste fill Stoping configurations are predominantly double lift (40m vertical interval) however single lift stoping (20m vertical interval) is used in some areasSelection of a Mining Method for the C Anticline of the ,, longitudinal retreat and transverse sublevel caving was proposed as a suitable mining method for C Anticline The cavability assessment for the proposed sublevel caving showed an increased probability of hanging wall caving as mining progress The proposed mining method ,Stability of underground mine development intersections ,, Dec 01, 2014· The longitudinal method uses two drifts (upper and lower) running along the strike through the orebody with fewer cross cuts, thus requiring less mine development Stoping and backfilling are often practiced in longitudinal retreat; see Fig 1c Both transverse and longitudinal stoping methods are particularly suited for steeply dipping orebodiLonghole, This method consists in a variety of chambers where the mine blocks are generally cut by sub-levels from which long holes are drilled in plans that are generally parallel These boreholes allow to blast the block by successive vertical break The broken ore is mucked out by drawpoints or by longitudinal retreatMétodo de Explotación Subterránea: Sublevel stoping, May 25, 2015· Disposición de los tajeos - Longitudinal FIGURA 6 Longitudinal Longhole retreat mining Fuente: Queen´s University 10Underground Mining Methods - Sublevel Stoping 11 Disposición de los tajeos - Transversal FIGURA 7 Transversal Longhole Stoping Fuente: Queen´s University 11Underground Mining Methods - Sublevel Stoping 12.

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    Examining the Influence of Stope Strike Length On ,, Jun 27, 2010· The mining method is longitudinal retreat with delayed backfill on sublevels of 30 m intervals Stope dimensions are 12m along the strike and have variable width following the vein A two-dimensional, finite element model was developed to simulate the longitudinal mining and backfilling process while monitoring ore dilutionLongitudinal longhole retreat, Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping For longitudinal retreat the long axis of the stope is along (or parallel) to the strike of the orebody It may also be referred to as bench stoping or sublevel benchingMajor Mines & Projects | Island Gold Mine, Of all the methods tested since mining activities commenced at the Island Gold mine, the longitudinal long-hole retreat mining is the preferred method The ore width, vertical dip, good ground quality, productivity factors, costs, and availability of equipment and personnel were some of the major parameters involved in the decisionMajor Mines & Projects, Longitudinal bottom-up stoping has been used above 190 level Due to the orebody width and mine sequencing, stopes between the 190 level and the 280 level are mined using the transverse method with primary and secondary stopes, with some longitudinal retreat mining occurring at the extremities of the orebody Most of the primary stopes above ,Vertical Crater Retreat, Mining retreats horizontally as successive vertical slices are blasted Vertical block mining is the term most often used for this method In VBM the workplace is divided into a series of vertical blocks and the blocks may be nined on a retreat basis working from the ends of the workplace.

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