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longitudinal retreat mining method

Longitudinal longhole retreat QueensMineDesignWiki

Orebody Characteristics and Geotechnical ConditionsDrilling and BlastingSafety and PerformanceSequencingBackfillDilutionLongitudinal Longhole Retreat VariationsReferencesLongitudinal longhole mining may be used when there is a steeply dipping orebody with the inclination of the footwall greater than that of the angle of repose of the blasted muck. Also, the hanging wall and footwall, must be fairly good or better but group support in the form of cable bolts must be installed, and the mineralized zone must have regular ore boundaries. The size and shape of the extraction block can be altered to fit the orebody geometry and the mine infrastruct

Transverse longhole stoping QueensMineDesignWiki

Longitudinal longhole methods are very well suited to retreat mining, and can be planned such that development occurs within the ore itself, reducing development costs, and generating revenue in the process.

Course Outline Design Topics Main Page Lamefoot Mine Social Engagement Mine Guides

longitudinal retreat mining method

Longitudinal Retreat Mining Method 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 stopes.

The Obuasi Mine Longitudinal Retreat Mining Method

The causes for the changes are multiple, ranging from orebody capability, dynamics, technology, safety, economics, production levels, geotechnical, etc. Mining methods applied have also ranged from timber square setts, conventional cut-and-fill, shrinkage stoping, sublevel caving, mechanised cut-and-fill, longitudinal and transverse open stoping, and lately longitudinal retreat mining method (LRMM).

Types of Mining Methods Sell Side Handbook

Mar 10, 2018Longwall mining method is highly mechanized and can be used with utmost precision. The soft material can be cut loose mechanically as it does not require drilling or blasting. Special cutting machines or rotating drums with cutters move back and forth along the faces cutting off a slice of the seam.

Major MinesProjects Mining Intelligence and News

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 Lower and Deep zones, instead of the more typical SLR. Modified Avoca is an alternative of longitudinal retreat mining method.

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.

Major MinesProjects Mining Intelligence and News

Long-hole open stope is the mining method used at the 777 mine. Mine sequencing involves primary, secondary, chevron and longitudinal retreat stopes that are either paste or unconsolidated loose waste rock backfilled. Long-hole stopes are mined at 15 metre to 17 metre vertical sill to sill intervals.

(PDF) Underground mining Methods ResearchGate

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-lying

Sublevel Stoping Mining Method YouTube

Feb 10, 2018Black Diamond Drilling Services Australia Database

作者: Black Diamond Drilling Services Australia PTY LTD

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.

Longitudinal Retreat Mining Method kpjlangeveen

longitudinal retreat mining method greenrevolutionorgin. Sublevel open stoping, by longitudinal retreat, is the most commonly used stoping methodLongitudinal retreat mining of deep, narrow vein lenses under sand fill at the Golden Giant

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.

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

Edumine Design and Application of Sublevel Stoping Methods

Oct 31, 2019This 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). Variations of this method include vein (Alimak) mining, transverse stoping, Avoca and longitudinal mining. Sublevel stoping

Choice of Method

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.

method statement of road milling

longitudinal retreat mining method; pouring method for the cement mill hopper; manufacturing method of ball mill; method statement for stone crusher; diagram of copper eand traction method; hammer mill grinding method; method of open pit mining for bauxite; crushing milling method statement; method of mining of gypsum; method manganese ores

(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.

Operations LaRonde Agnico Eagle Mines Limited

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

Effect 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 100% 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 adjacent to a mined stope.

Universidade Federal do Rio Grande do Sul

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

IAMGOLD Reaffirms Long-Term Production Guidance for

Aug 05, 2020MINING METHOD. Long-hole open stoping ("LHOS") is the primary mining method used at West. Stopes are approximately 25 to 30 metres high with a strike varying from 12 to 15 metres in length.

STILL DRAFTING PROJECT REAL 2 LinkedIn SlideShare

Oct 29, 201511 Fig.3.1 Longitudinal Retreat Mining Method (Source: AGA Mine Technical Services Dept.) 3.2.3 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

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.

IAMGOLD Reaffirms Long-Term Production Guidance for

Aug 05, 2020MINING METHOD. Long-hole open stoping ("LHOS") is the primary mining method used at West. Stopes are approximately 25 to 30 metres high with a strike varying from 12 to 15 metres in length.

Operations LaRonde Agnico Eagle Mines Limited

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

Effect 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 100% 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 adjacent to a mined stope.

Johan Ferreira, MAusIMM(CP), RPEQ Mine Manager Red

The primary mining method adopted is narrow vein retreat long hole open stoping. Longitudinal as well as transverse stoping methods are being used. At Karari Mine open stopes are being backfilled from paste fill being provided from a newly constructed backfill plant.

职位: Mining Manager at Red River

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.

Wireless initiation: Enabling new mining methods

modified AVOCA mining method for the majority of its’ mining in retreats without secondary access. Using this method, each blast is backfilled and waste is removed from the backfilled stope (void pull) to create a void for the next blast. As the blast follows the ore body down, the increasing depth, strike length and number of lifts contributes

Lamaque Gold Mine, Val-d’Or, Quebec Mining Technology

Feb 26, 2015Based on the Triangle deposit’s 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.

STILL DRAFTING PROJECT REAL 2 LinkedIn SlideShare

Oct 29, 201511 Fig.3.1 Longitudinal Retreat Mining Method (Source: AGA Mine Technical Services Dept.) 3.2.3 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

B.Eng (Mining), Grad.Cert.Eng Thesis submitted in

vein mining methods. Furthermore, understanding the underlying causes of dilution in narrow-vein mining is an essential element in dilution minimisation. Sponsors of the 2nd AMIRA Blasting and Reinforcement Technology Project expressed concern about the applicability of empirical stability charts to narrow-vein stope design and dilution prediction.

UNDERGROUND MINING METHODS YouTube

Nov 10, 2017Subject :GEOLOGY Course :ENERGY RESOURCES AND MINERAL EXPLORATIONS Keyword : SWAYAMPRABHA

作者: CH-08:ARYABHATT [Mathematics, Physics, Chemistry]

TECHNICAL REPORT AND PRELIMINARY ECONOMIC

technical report and preliminary economic assessment of the upper beaver gold-copper deposit kirkland lake, ontario, canada for queenston mining inc.

REVIEW OF FILL MINING TECHNOLOGY IN CANADA by K.H.

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 mining.

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.

Stoping Wikipedia

The 1893 mining disaster at Dolcoath mine in Cornwall was caused by failure of the stulls holding up a huge weight of waste rock. Square-set stoping. Square-set stoping is a method relying on square-set timbering. Square set timbers are set into place as support and are then filled with cement. The cement commonly uses fine tailings.

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