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Feb 20, 2020· Longhole 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. Longhole stopes are mined at 15 metre to 17 metre vertical sill to sill intervals.
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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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 .
Lapa Mining Method 26m Longitudinal Retreat AGNICO EAGLE . Title: PowerPoint Presentation Author: George Dikho Created Date: 3/1/2013 10:26:46 AM
A longitudinal retreat longhole mining method was selected for the Triangle zone based on the orebody characteristics, including grade, dip, continuity, thickness, etc. Although some part of the Czones have hanging walls dipping shallowly (as low as 43 degrees), the approach in this study has been to promote the application of longhole ...
Jul 17, 2018· The mining method selected is longhole with longitudinal retreat on panels with minimum dimensions of 20 (length) x 20 (height) metres and minimum thicknesses of to metres. Mineralized material will be extracted using a fleet of 14 tonne loadhauldumps ("LHDs") and 50 tonne haul trucks using a ramp at a rate of 2600 tpd.
Mar 09, 2018· Selecting a Mining Method. ... Some common ones include longitudinal stoping, transverse longitudinal stoping, bighole 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 sheetlike. Transverse ...
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 ...
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.
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, .
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 15m sections with cemented rockfill or cemented pastefill, as well as transverse open stoping with both cemented and unconsolidated rockfill as well as cemented pastefill.
Mining at Kamoto mine. Room and pillar, transversal longhole retreat with backfill, and longitudinal longhole retreat with backfill 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.
2) Room (Bor d)andPillar mining (or con tinuous mining) method It is the most common supported pillar method, designed and used primarily for mining flatlying
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
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 ...
This method consists in a variety of chambers where the mine blocks are generally cut by sublevels 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.
This has been incorporated into the Mine''s current reconfiguring operational plan. Longitudinal Retreat Mining Method Application and Challenges at Obuasi Mines, Narrow Vein Conference Perth, Australia, Oct 2011. Evaluation of Ore Transport Options from Kwesi Mensah Shaft to the Mill at the Obuasi Mine Owusu Mensah, Francis (Mineral Resources...
Mining Methods: The primary mining method is longitudinal retreat longhole stoping. Ore is hauled by truck to the Kremzar mill located approximately km from the portal of the ramp. Processing Method:
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 ...
The Island underground gold mine has been mined using longitudinal longhole 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.
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.
Longhole Stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing. ... in the centre of the mining block with retreats ...
technical report and preliminary economic assessment of the upper beaver goldcopper deposit kirkland lake, ontario, canada for queenston mining inc.
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