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 …Web
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2.2 Mining method Most of the production at LaRonde is done by transverse open stoping (with primary and secondary stopes). ... a longitudinal retreat method and backfilled with either cemented rockfill or pastefill. 1 28 33 99 10 10 41111 55 66 12 12 13 13 77 Figure 3 Ideal mining sequence BasaltWeb
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The selected mining method is mainly long hole longitudinal retreat with some stopes using a modified long hole longitudinal retreat method. Primary materials handling fleet will comprise of 10 tonne scooptram Load Haul Dump and 50 t haul trucks. ... The long hole mining method was primarily selected due to the sub vertical geometry of ...Web
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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. This is a relatively...Web
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Steeply dipping, vein and tabular orebodies are traditionally extracted with longitudinal retreat mining methods such as Eureka and Avoca in a bottom-up …Web
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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 plant processes 2,000 tonnes of ore per day. ...Web
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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. …Web
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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 highWeb
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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.Web
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Recently, the longitudinal SLC-retreat, called remnant mining, is used to mine out unrecovered parts around the backfilled orebodies. This method is very similar to the SLSh explained in Sect. 2. …Web
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Mining methods of the PLS uranium project. The PLS uranium project will be operated as an underground mine using longhole stoping method in a longitudinal retreat orientation. The completed …Web
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Mining areas are accessed via three portals: the Santa Rosa, Babicanora Central, and Las Chispas Portals. The longhole longitudinal retreat mining method is used in mining areas where areas where ground conditions are fair to good. longhole stope heights of 15 m to 18 m, as well as a maximum strike length of 25 m, were selected based on ...Web
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2) Room (Bor d)-and-Pillar mining (or con tinuous mining) method It is the most common supported pillar method, designe d and used p ri mar i ly f or min in g fl a t - lyingWeb
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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 ...Web
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Longitudinal retreat; Cemented backfill; Backfill; Mine Life: 13 years (as of Jan 1, 2017) ... (SLOS) and Sublevel Retreat (SLR) will be the main mining methods planned, supplemented by post pillar cut and fill (PPCF) and mechanized cut and fill (MCF) mining for Upper zone where mineralization dip angle is approximately at 39 degrees. All ...Web
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Stoping is the method used in mining operations of extracting ore and waste rock from underground mines that create openings called stopes. There are several types of stoping that vary based on the mining techniques used to move ore and waste throughout the stope. Stoping occurs in two steps: developing the ore blocks to prepare …Web
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Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping. For longitudinal retreat the long axis of the stope is along (or parallel) to the strike of the orebody. It may also be referred to as bench stoping or sublevel benching.
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3.1 Open Stoping and Stope Technical Performance. Mining today is focused on maximizing production at the lowest costs and highest level of safety for the employees. As a result, more companies are adopting bulk non-entry underground mining methods, such as sublevel open stoping and vertical crater retreat, mining methods that can be …Web
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The mining method currently in use is long hole longitudinal retreat sub level open stoping (the Avoca method) with the following parameters: - Sills are driven on 15 m (sublevel) spacing approximately 4.5 m high; - Longhole stopes (panels) are drilled using parallel or fan drill holes between the sublevels (approximately 11 m);Web
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Main mining sublevels will be spaced 75 m apart, with stope sublevels placed at 25 m spacing. The upper sublevel in each level will contain a five metre sill pillar. The two mining methods will be longitudinal retreat longhole mining, and vertical retreat mining (VRM) with primary and secondary sequencing.Web
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Sub-level long-hole stoping method with multiple longitudinal panels utilizing delayed backfill is approximately 90% of the production. RMR Rock Quality Designation (RQD) - walls: 80%. ... Primary Mining Method Sub-level long-hole retreat with backfill. Information. WALTERS ZONE. Stope height: 15.5 m (50.8 ft).Web
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Longitudinal view of the LaRonde orebody Geological setting Reserves are found in four principal stratigraphic units (from north to south: zones 7, 19, 20 and 21, Figure 2). Zones …Web
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Mining at Minera Florida is conducted using various underground variations on sublevel stoping (SLS), either traditional SLS or longitudinal retreat. The different mining zones are accessed via ramps that provide flexibility and access to the ore at different elevations. Traditional SLS is used for veins thicker than 3.5 m.Web
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Mining methods at the Rook 1 uranium project. The current mining plan based on the feasibility study uses a 0.3% U 3 O 8 cut-off grade, ... The mining plan involves the use of longitudinal retreat and transverse stopes with a level spacing of 30m and a nominal stope strike length of 12m to 24m.Web
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Mining Geomechanics. Shuren Wang, ... Chen Cao, in Advances in Rock-Support and Geotechnical Engineering, 2016. 2.4 Engineering Application. A surface mine was underlied mined-out areas by room-and-pillar stoping method. The harmonic mechanical load was acting on the center of the roof surface of the mined-out areas; its vibration frequency is …Web
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The main advantages of this mining method are that it is a non-entry method, making it one of the safest underground mining methods, and that it can achieve high production rates. ... Steeply dipping, vein and tabular orebodies are traditionally extracted with longitudinal retreat mining methods such as Eureka and Avoca in a …Web
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LHOS is a highly selective and productive method of mining that can be employed for orebodies of varying thicknesses and dips. The main distinct variations of the LHOS used at Obuasi are longitudinal retreat stoping (LRS), and transverse open stoping (TOS). The blind upper stoping(BUS) is a form of LRS or TOS used for partial sill pillar recovery.Web
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Longitudinal retreat; Summary: Lubambe is an underground operation utilising the Longitudinal Room and Pillar mining method. The current mining method employed is a variant of room and pillar 'modified room and pillar' which also falls under open stoping methods (unsupported underground mining methods).This method has stope designs …Web
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Longitudinal retreat; Paste backfill; Summary: The current mining method is longitudinal longhole retreat stoping, with sublevel intervals at 30 m spacing. The mine has been divided into seven mining horizons to allow for several simultaneously-active mining fronts.Web
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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.Web
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Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping. For longitudinal retreat the long axis of the stope is along (or parallel) to the strike of the orebody. ... Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is removed from one level at the bottom ...Web
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The study is divided into two parts: dilution control and mining method selection. Dilution control was done by identifying the reasons for dilution and examining their. impact on Kittilä mine. After this, measures could be developed to …Web
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Longitudinal retreat and transverse primary-secondary mining methods will also be used dependent on mineralization geometry and stope design criteria. The mine will use a combination of conventional and automated equipment, similar to what is currently used at the LaRonde Complex. The first production blast from the Odyssey underground mine ...Web
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The mining method used at Casposo is longitudinal longhole retreat. Mine production is made up of a combination of ore development through sill drifts (34%) and stope production (66%). The veins are accessed by sub-level footwall drives, driven from …Web
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Mine Life. 8.17 years (as of Jan 1, 2020) Keno Hill is one of the world's highest-grade silver mines. Hecla Mining Company began ramp-up of the Keno Hill mill during the second quarter of 2023 and expects to operate at full production levels by year-end and to reach 2.5 million ounces of silver in 2023.Web
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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. ... Agnico is investigating various mining methods and ground support systems due to seismic …Web
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The long hole open stoping (LHOS) method will be used for underground mining following a longitudinal retreat approach, with a bottom-up stope sequence. Underground mining will begin after the start of open-pit operations at Goliath, with the first ore from the underground operation expected in year one and sustained commercial …Web
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