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The most commonly used sublevel stoping mining methods are sublevel open stoping, longhole 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 accounts for more than 60% of all underground production in ...
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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 .
F, 2012. The Obuasi mine – longitudinal retreat mining method application and challenges, in Proceedings Narrow Vein Mining 2012, pp 59-70 (The Australasian Institute of Mining .
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.
Mining Method(s): Longitudinal retreat with cemented rock or paste backfill, and transverse open stoping with cemented rock backfill, paste or unconsolidated backfill. Processing Method(s): LaRonde mineral processing complex, which includes copper and .
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.
Mining at Kamoto mine. Room and pillar, transversal longhole retreat with back-fill, and longitudinal longhole retreat with back-fill are currently applied at the Kamoto underground mine. Room and pillar method is employed at the OBS and OBI horizons, while the access drives are constructed along strike on the hanging wall contact.
Jun 01, 2008· The deepest mining to date is on level 233 (2,330 m below surface), and the decline has reached level 242. LaRonde uses two mining methods: longitudinal retreat in 15-m sections with cemented rockfill or cemented pastefill, as well as transverse open stoping with both cemented and unconsolidated rockfill as well as cemented pastefill.
Feb 20, 2020· 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.
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
This course refers to the generic mining method of sublevel stoping. The most commonly used sublevel stoping mining methods are sublevel open stoping, longhole open stoping or blasthole stoping, and vertical crater retreat (VCR). Variations of this method include vein (Alimak) mining, transverse stoping, Avoca and longitudinal mining. Get Price
longitudinal retreat mining method. longitudinal retreat mining method Eagle Mine215 Кб This method provides the cost advantages of bulk mining . Get Price And Support Online; Eagle Mine - Lundin Mining. Mine facilities and method The orebody is accessed from surface by decline mined . Mining Operations Eagle Mine is an underground ...
Oct 31, 2019· 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). Variations of this method include vein (Alimak) mining, transverse stoping, Avoca and longitudinal mining. Sublevel stoping accounts for more than 60% of .
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
The mining method employed is long hole retreat stoping, utilising up and down holes with artificial concrete pillars. Stawell is currently mining the Golden Gift and Magdala orebodies. ... Figure 3 longitudinal section of the blast. The wall was painted by a Geologist to indicate the ore/waste boundary.
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, .
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 ...
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
The Island underground gold mine has been mined using longitudinal long-hole retreat mining or modified avoca mining method, as it is considered as the most productive and economic option. The drilling technique involves drilling a series of vertical holes in the ore from one level to the other and then blasting the ore in vertical slices.
Mining Methods: The primary mining method is longitudinal retreat long-hole stoping. Ore is hauled by truck to the Kremzar mill located approximately 0.8 km from the portal of the ramp. Processing Method:
Jul 17, 2018· The mining method selected is long-hole with longitudinal retreat on panels with minimum dimensions of 20 (length) x 20 (height) metres and minimum thicknesses of 3.5 to 4.0 metres. Mineralized material will be extracted using a fleet of 14 tonne load-haul-dumps ("LHDs") and 50 tonne haul trucks using a ramp at a rate of 2600 tpd.
technical report and preliminary economic assessment of the upper beaver gold-copper deposit kirkland lake, ontario, canada for queenston mining inc.
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. Integration and pilot testing of automated mining equipment (two trucks and one scoop tram) continued in 2019.
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