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Longitudinal Retreat Mining Method

The Obuasi Mine Longitudinal Retreat Mining Method

The Obuasi Mine Longitudinal Retreat Mining Method

The Obuasi Mine - Longitudinal Retreat Mining Method Application and Challenges. The Obuasi Mine has been in operation for the past 100 years. Within this period a host of mining methods have been employed during its various changing phases. The causes for the changes are multiple, ranging from orebody capability, dynamics, technology, safety, economics,

Longitudinal open stope mining or sublevel retreat

Longitudinal Open Stope Mining Or Sublevel Retreat

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

Longhole Welcome to the NarrowVein Mining Project

Longhole Welcome To The Narrowvein Mining Project

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.

Strategic sill pillar design for reduced hanging wall

Strategic Sill Pillar Design For Reduced Hanging Wall

Sep 01, 2021 Steeply dipping, vein and tabular orebodies are traditionally extracted with longitudinal retreat mining methods such as Eureka and Avoca in a bottom-up sequence with delayed backfill. To increase productivity, sill pillars in the orebody are used to separate mining zones thus allowing production to take place simultaneously in two or more zones.

Major Mines Projects Mining Intelligence and News

Major Mines Projects Mining Intelligence And News

Backfill for the transverse stopes would be cemented rock fill (CRF) for primary stopes and RF and/or CRF for secondary stopes. Backfill for the longitudinal retreat stopes would be a mix of CRF with RF. A modified Avoca method could also be utilized in some areas of the Main zone and S1 Shallow zone, instead of the more typical SLR.

Longitudinal Retreat Mining Method Reefkeeping

Longitudinal Retreat Mining Method Reefkeeping

Longitudinal retreat mining method eagle mine215 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.

Lapa Mining Method 26m Longitudinal Retreat

Lapa Mining Method 26m Longitudinal Retreat

Lapa Mining Method - 26m Longitudinal Retreat AGNICO EAGLE 4.2m . Title PowerPoint Presentation Author George Dikho Created Date 3/1/2013 102646 AM

Quick Answer What Is Long Hole Stoping BPsfw

Quick Answer What Is Long Hole Stoping Bpsfw

Oct 22, 2021 Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping. It is a branch of longhole mining differing from Transverse longhole stoping, where the long axis of the stope is perpendicular to the strike of the orebody.

Major Mines Projects Mining Intelligence and News

Major Mines Projects Mining Intelligence And News

Three mining methods are used at the Yalea and Gara underground mines. They are long hole transverse open stoping long hole longitudinal retreat open stoping and stoping under rock fill (SURF). SURF mining is planned to be introduced in the weathered areas of Yalea South Upper.

Mining Terms Magyver

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.

Choice of Method Welcome to the NarrowVein Mining

Choice Of Method Welcome To The Narrowvein Mining

The mining method mostly used is a transverse primary and secondary longhole method. Usually, the development is done two years in advance of the production schedule. Therefore, when narrower areas are encountered in these sectors, the mining method generally used to recover these stopes is the longhole retreat method.

What is long hole open stoping

What Is Long Hole Open Stoping

Jan 22, 2021 Transverse Longhole Stoping is a popular large scale underground mining method known for its ability to simplify stope sequencing. It is an open stoping method and is very similar to sub-level open stoping, Longitudinal longhole retreat, and blast hole stoping. Where are the drawpoints in a longhole stoping?

Diggers and Dealers Mining Forum The Vault

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

Stoping Mining Methods

Stoping Mining Methods

Apr 03, 2017 Stoping Methods. A classification of stoping methods based upon method of support was adopted by the Mining Division of the Bureau of Mines in 1928. This classification has been used ever since as a basis for describing methods in its publications dealing with mining methods and costs and is as follows Classification of stoping methods

Stop Mining Method Mineral Processing Metallurgy

Stop Mining Method Mineral Processing Metallurgy

Feb 22, 2018 Retreat mining can be dangerous however, if the roof refuses to collapse progressively or if the roof collapses suddenly with little working warning. On way of increasing the recovery in room and pillar operations is to remove the

Mining method evaluation and dilution control in Kittil

Mining Method Evaluation And Dilution Control In Kittil

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 the ore and how to reduce the dilution.

Longhole Welcome to the NarrowVein Mining Project

Longhole Welcome To The Narrowvein 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.

Royal Gold Inc Our Portfolio Producing Properties

Royal Gold Inc Our Portfolio Producing Properties

The mining methods are longitudinal retreat with paste-backfill, and transverse open-stoping with paste or unconsolidated backfill. All of the ore is trucked to the surface before being trucked to the LZ5 ore processing plant. The LZ5 ore processing

REVIEW OF FILL MINING TECHNOLOGY IN CANADA by

Review Of Fill Mining Technology In Canada By

Also at INCOs Frood-Stobie Mine undercut-and-fill methods were developed in 1956 for mining broken-up rib pillars (5). In the early 1960s 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 mining.

Factors influencing overbreak in narrow vein

Factors Influencing Overbreak In Narrow Vein

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

Harte Gold Corp Overview

Harte Gold Corp Overview

The primary mining method is longitudinal retreat stoping. Typically, four sublevels are combined to form a mining block and within each mining block a bottom-up stoping sequence will be used. The process plant produces a gold dore bar and bagged gold concentrate thgrough gravity concentration and flotation circuits, respectively.

Las Chispas Mine Sonora Mexico Mining Technology

Las Chispas Mine Sonora Mexico Mining Technology

Mining methods at Las Chispas. The Las Chispas mine will use long-hole stoping and cut-and-fill mining methods via several access drifts and ramps. Long-hole longitudinal retreat stoping and Avoca methods will be included as part of the long-hole stope mining methods in mining areas where vein thicknesses are greater than 1.5m.

Narrow Vein Mining Conference 2012

Narrow Vein Mining Conference 2012

The Obuasi Mine Longitudinal Retreat Mining Method Application and Challenges F Nsarko and F Owusu-Mensah 59 Challenges Faced by Narrow Vein Graphite Mining and In uence of Graphite In ll on Wall Stability H S Welideniya and K Ekanayake 71 Geology and Evaluation Review of the Advances Made in Geological

Vertical Crater Retreat Mining 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 mining .

Vertical Crater Retreat

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

841a Cut and Fill Stoping ABC 123 Testing Site Course

841a Cut And Fill Stoping Abc 123 Testing Site Course

8.4.1a Cut and Fill Stoping. Cut and fill is a very expensive method, but is very selective. You might predict the type of deposits in which it would be employed as the principal mining method. High value metalliferous ores such as gold or silver are often mined by this, and when the high-grade ore is in veins, the high degree of selectivity of this method is a real asset.

Carosue Dam Operations Northern Star

Carosue Dam Operations Northern Star

The mining method is longhole open stoping with paste fill. The open stopes are backfilled with paste utilising tailings from the Carosue Dam Mill. The orebody is accessed via two declines, with 25m levels accessed via an end on access with strike ore drives and then stoped out via longitudinal retreat stoping.

The top ten deepest mines in the world mining

The Top Ten Deepest Mines In The World Mining

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.

Estimation and Separation of Longitudinal Dynamic

Estimation And Separation Of Longitudinal Dynamic

Nov 19, 2021 This paper focuses on estimating dynamic stability derivatives using a computational fluid dynamics (CFD)-based force oscillation method, and on separating the coupled dynamic derivatives terms obtained from the method. A transient RANS solver is used to calculate the time history of aerodynamic moments for a test model oscillating about the center

Alamos Gold Island Gold Mine Canada

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.

US3642325A Process and apparatus for mining by retreat

Us3642325a Process And Apparatus For Mining By Retreat

A process of mining a horizontal coal seam in an underground mine comprising first boring a hole in the middle of the seam while continuously removing the coal with an auger conveyor. Then after suitable penetration reaming wings on the conveyor are opened to span the full height of the seam. The wings have cutters on them so that as the apparatus is withdrawn the coal is

Lamaque Gold Mine ValdOr Quebec Mining Technology

Lamaque Gold Mine Valdor Quebec Mining Technology

Based on the Triangle deposits orebody characteristics, a longitudinal retreat long-hole mining method was selected. Sill pillars are placed temporarily to facilitate the simultaneous operation of a greater number of production areas. The pillars are removed as the mining activity advances upwards to the sill level.

Underground Mining Methods UFRGS

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

734 Highwall Mining ABC 123 Testing Site Course

734 Highwall Mining Abc 123 Testing Site Course

Jul 03, 2015 7.3.4 Highwall Mining. Highwall mining is very similar to auger mining in its concept, where the entry into the coal seam in made at the highwall of the ultimate pit limit. The difference lies in the use of a more sophisticated machine, known as a highwall miner. The highwall miner shares some common elements with a continuous mining machine.

Vertical Crater Retreat VSIPINFO

Vertical Crater Retreat Vsipinfo

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.