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longitudinal retreat mining method

longitudinal retreat mining method - greenrevolution

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

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Lapa Mining Method - 26m Longitudinal Retreat AGNICO

Lapa Mining Method - 26m Longitudinal Retreat AGNICO EAGLE 4.2m . Title: PowerPoint Presentation Author: George Dikho Created Date: 3/1/2013 10:26:46 AM

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Types of Mining Methods Sell Side Handbook

Mar 11, 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 ...

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longitudinal retreat mining method

longitudinal retreat mining method. Dictionary 's List of Every Word of the Year . Our Word of the Year choice serves as a symbol of each year's most meaningful events and lookup trends. It is an opportunity for us to reflect on the language and . Inquiry Online. Planetary Base - Atomic Rockets.

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Longhole - Welcome to the Narrow-Vein Mining Project

Longhole. 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 retreat.

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(PDF) Open Stope Mining in Canada - ResearchGate

Longitudinal open stope mining, or sublevel retreat (after Potvin and Hudyma, 1989). Much of the development necessary for this mining method can be kept in the orebody.

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Major Mines Projects Patterson Lake South Project

The mining method for the underground will be longhole retreat mining in both transverse and longitudinal methods, and some localized drift and fill mining based on current block model information. The mining will progress from the bottom levels to the top, and from the southwest to northeast. Mining is planned at nominally 1,000 tpd ore.

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Factors 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.

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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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UNDERGROUND MINING METHODS - YouTube

Nov 10, 2017  Subject :GEOLOGYCourse :ENERGY RESOURCES AND MINERAL EXPLORATIONSKeyword : SWAYAMPRABHA

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Room and pillar mining - Wikipedia

Retreat mining (below) is an example of a process like this. Retreat mining. Retreat mining is often the final stage of room and pillar mining. Once a deposit has been exhausted using this method, the pillars that were left behind initially are removed, or "pulled", retreating back towards the mine's entrance.

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TECHNICAL REPORT FOR THE EAGLE RIVER MINING

EAGLE RIVER MINING COMPLEX . INCLUDING THE EAGLE RIVER GOLD MINE . THE MISHI GOLD MINE AND RELATED INFRASTRUCTURE (According to Regulation 43-101 and Form 43-101F1) LOCATION . Mishibishu Lake Area and Point Isacor . Sault Ste Marie Mining Division . Province of Ontario, Canada . Prepared for: Wesdome Gold Mines Ltd. 8 King Street East, Suite 811

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Rook I Uranium Project, Saskatchewan Province, Canada

Mining at Rook I uranium project. The Rook I uranium project will employ transverse stope mining and longitudinal retreat stope mining methods for extracting ore. The Arrow deposit is proposed to be accessed by using two shafts, including a production shaft and a ventilation shaft.

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longitudinal retreat mining method

4 MINING 4.1 Mining Method The mining method employed at CBI has been de­ signed for extraction with complete pillar re­ covery, while allowing no perceptible surface subsi­ dence. The mining method is retreat transverse and/or longitudinal long hole stoping with post backfill. The ore body is accessed from a ramp system lo­ Get Price

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Mining Terms - Magyver

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 space.

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Data mining methods for longitudinal data

Mining longitudinal data toc kdd long tree seq other ref J I N H 8/12/2004gr 3 1.2 Main classes of methods Supervised learning (discrimination, classification, prediction) The outcome

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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 mining .

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Retreat Mining, Room and pillar mining, Underground Mining ...

Retreat Mining. Retreat mining is the last phase of a general kind of coal mining technique referred to as room and pillar mining. In room and pillar mining a mining machine called as "continuous miner" bores a network of chambers or "rooms" into a coal seam, leaving at the back an unexcavated pillar of coal in every room to support the roof of the mine.

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Alamos Gold - Island Gold Mine Canada

The primary mining method is longitudinal retreat long-hole stoping. Ore is hauled by truck to the Kremzar mill located approximately 0.8 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 2025.

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Mining method evaluation and dilution control in Kittilä mine

underground mining method was defined during the feasibility study with limited information. With the experience from the underground mining and more rock mechanical and geological data, this thesis was conducted to study if there could be more cost effective method for mining

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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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mining engineering: Mining Methods

Aug 28, 2010  The underground mining methods presented in this chapter are mainly applicable to hard rock mines. Softer, non-metallic ores, such as coal, salt, potash, trona (soda ash), and oil shale are often amenable to different methods than those described in this chapter.

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UNDERGROUND MINING METHODS - YouTube

Nov 10, 2017  Subject :GEOLOGYCourse :ENERGY RESOURCES AND MINERAL EXPLORATIONSKeyword : SWAYAMPRABHA

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Agnico Eagle Mines Limited - Operations - Operations ...

The mining methods are longitudinal retreat with paste backfill, and transverse open stoping with paste or unconsolidated backfill. In its first year of operation, the mine achieved its designed production rate of 1,975 tonnes/day, and by the fourth quarter of 2020, the LZ5 production rate was 2,987 tpd, essentially meeting the targeted rate of ...

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TECHNICAL REPORT FOR THE EAGLE RIVER MINING

EAGLE RIVER MINING COMPLEX . INCLUDING THE EAGLE RIVER GOLD MINE . THE MISHI GOLD MINE AND RELATED INFRASTRUCTURE (According to Regulation 43-101 and Form 43-101F1) LOCATION . Mishibishu Lake Area and Point Isacor . Sault Ste Marie Mining Division . Province of Ontario, Canada . Prepared for: Wesdome Gold Mines Ltd. 8 King Street East, Suite 811

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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 dilution.

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CDC - Mining Feature - Retreat Mining Safety - NIOSH

May 20, 2014  Mining Feature: Brody Mine Accident Highlights Need for Retreat Mining Safety. On May 12, 2014, two mine workers—a continuous mining machine operator and a roof bolting machine operator—tragically lost their lives while working

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Types of Underground Mining Method Comparison

Mar 16, 2017  Longitudinal Back, Flat-Back Mining Method Long-Wall StopingmMining Method. After starting an overhand stope the shape in which the back is carried is often of prime importance. In A, Fig. 2, is illustrated the method of carrying a flat or longitudinal back (the term long-wall is used sometimes when the vein lies nearly flat).

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Lapa Mine ground control practices in extreme squeezing

2.2 Mining method The primary mining method used at Lapa is longitudinal open stoping with cemented backfill (Figure 4). Sublevels are developed at 30 m intervals and the ore is removed between the sublevels using the long hole blasting technique in a longitudinal retreat configuration. Typical stope size is 12 m wide by 30 m high

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Diggers and Dealers Mining Forum - The Vault

• Changing mining method to longitudinal retreat mining, hence reducing development meters , simplifying the 40000 35000 30000 25000 20000 15000 800 700 600 500 400 300 (oz/month) / Cash Costs ($/month) Unit Cash Costs ($ / oz) 12

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US3712677A - Mining method - Google Patents

A chamber mining technique whereby a series of horizontal slopes are formed between haulage and bleeder entries. 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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Underground Mining Methods - UFRGS

characteristics of the major mining methods. 1.3.2 Room-and-Pillar Mining Room-and-pillar mining is designed for flat-bedded deposits of limited thickness, such as copper shale, coal, salt and potash, limestone, and dolomite. This method is used to recover resources in open stopes. The method leaves pillars to support the

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Retreating longwall method mining Britannica

Other articles where Retreating longwall method is discussed: coal mining: Longwall mining: described above, known as the retreating method, is the most commonly used in the United States. In this method the block is developed to its boundary first, and then the block is mined back toward the main haulage tunnel. In the advancing longwall method, which is more common in Europe,

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Advancing and Retreating Longwalls ~ Mining Engineering ...

May 26, 2017  With retreat longwall mining, additional gateroads or bleeder roadways behind the goaf area can be developed for ventilation by the development unit if required. Such additional roadways are much more difficult to mine with an advancing longwall; There are more options for ventilation/gas control using additional roadways at the limit of the block

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The top ten deepest mines in the world - mining-technology

Jun 11, 2019  The mine uses longitudinal retreat and transverse open stoping methods to extract gold. Agnico initiated an extension programme at the mine to access the deeper part of the mine, which extended the mining depth to 3,008m below the surface.

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Caving Underground Mining Methods (longwall, Sublevel ...

Oct 23, 2014  The method has application, for example in sulfide deposits and underground kimberlite (diamond) mining. It is most applicable to :- o A large-scale or bulk mining method that is highly productive, low in cost, and used primarily on massive steeply dipping orebodies that must be mined underground. o Weak or moderately strong orebodies that ...

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IAMGOLD REAFFIRMS LONG-TERM PRODUCTION GUIDANCE

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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OSISKO MINING DELIVERS POSITIVE PEA UPDATE FOR

Mar 25, 2021  The selected mining method is long-hole open stoping with longitudinal retreat. Stope dimensions vary from 10 to 30 metres in strike length and 20 to 25 metres in height, with a minimum thickness of 4 metres. Mineralized material will be extracted using a fleet of 15 tonne load-haul-dump trucks and 51 tonne haul trucks using a ramp to surface.

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The Blasting Test and Blasting Vibration Monitoring of ...

May 04, 2016  The most suitable method for the south ore-body of II longitudinal prospecting line is deep hole flat-back cut and sub-level open stoping filling mining method and the corner part of ore-body adopts point to slice stoping method on the pillars. At present, the used mining method is the VCR and later filling method.

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