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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 kept in the orebody This is a relativelyThe 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 ofThe Obuasi Mine Longitudinal Retreat Mining Method
LaRonde Extension — mine design at three kilometres
22 Mining method Most of the production at LaRonde is done by transverse open stoping (with primary and secondary stopes) a longitudinal retreat method and backfilled2023年5月25日· Zusammenfassung Sublevel Shrinkage (SLSh) ist ein untertägiges Abbauverfahren, das dem Teilsohlenbruchbau (TBB) stark ähnelt, jedoch mit kontinuierlicher Einbringung von Versatz von obenSublevel Shrinkage (SLSh) Mining—A Stateoftheart
(PDF) Design of stoping parameters and support system
2014年1月1日· Longhole Stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing It encompasses advantage of Faster Stope2021年9月1日· Abstract Steeply dipping, vein and tabular orebodies are traditionally extracted with longitudinal retreat mining methods such as Eureka and Avoca in aStrategic sill pillar design for reduced hanging wall
Stability of underground mine development intersections
2014年12月1日· The longitudinal method uses two drifts (upper and lower) running along the strike through the orebody with fewer cross cuts, thus requiring less mineoperation Narrow vein longitudinal retreating mining methods are especially susceptible to hanging wall and footwall dilution due to the wall overbreak Understanding the factorsFactors influencing overbreak in narrow vein longitudinal retreat
Longhole Welcome to the NarrowVein Mining Project
Longhole 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 retreat2018年3月11日· Some common ones include longitudinal stoping, transverse longitudinal stoping, bighole stoping, and vertical crater retreat Longitudinal stoping, Compared to other mining methods, roomandTypes of Mining Methods | Sell Side Handbook
The Obuasi Mine Longitudinal Retreat Mining Method Application
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, production levels, geotechnical, etc Mining methods applied have alsoMining Geomechanics Shuren Wang, Chen Cao, in Advances in RockSupport and Geotechnical Engineering, 2016 24 Engineering Application A surface mine was underlied minedout areas by roomandpillar stoping method The harmonic mechanical load was acting on the center of the roof surface of the minedout areas; its vibration frequency isStoping an overview | ScienceDirect Topics
(PDF) Design of stoping parameters and support system for
2014年1月1日· PDF | Longhole Stoping is a popular large scale underground mining method for metalliferous mine known for its ability to simplify stope sequencing It indexphp/Longitudinallongholeretreat 5Longitudinal 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 simultaneouslyactive mining frontsMajor Mines & Projects | Eleonore Mine
Strategic sill pillar design for reduced hanging wall overbreak
2021年9月1日· Steeply dipping, vein and tabular orebodies are traditionally extracted with longitudinal retreat mining methods such as Eureka and Avoca in a bottomup sequence with delayed backfillThe 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 45 m high; Longhole stopes (panels) are drilled using parallel or fan drill holes between the sublevels (approximately 11 m);Major Mines & Projects | Kupol Mine
Major Mines & Projects | CasposoManantiales Complex
Open pit mining in Kamila and Mercado pits was completed in 2013, and all mining is currently planned as underground, although there is potential for open pit mining at Julieta The main production from the underground mine to date has been from Inca 1, Aztec, and Inca 2A The mining method used at Casposo is longitudinal longhole retreatLonghole 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 intervalsMajor Mines & Projects | 777 Mine
Major Mines & Projects | Holt Complex
Roomandpillar Cemented backfill Holt Mine Complex consists of three mines: The Holt Mine and Mill and the Holloway Mine, and the Taylor Mine located approximately 68 km by road west of the Holt Mill The Holt mill, which is currently on care and maintenance, has a capacity of 3,000 tpd and a fully permitted tailings storage facilityLalor mine is a multilens, flat lying orebody with ramp access from surface and shaft access to the 955 metre level Internal ramps located in the footwall of the orebody provide access between mining levels, with the mine currently developed to the 1,240 meter level in the Copper Gold lens 27 Stopes are accessed by cross cuts from the majorMajor Mines & Projects | Lalor Mine
LONGWALL RETREAT MINING – Mining Science and Technology
The predominant method of longwall mining in Australia is longwall retreat system In retreat longwall mining, two sets of entries are driven between 100 to 250m apart When the entries have been driven a predetermined length, say two kilometres, they are connected and a rectangular longwall block is outlined The longwall face is thenSublevel Open Stoping originated in the early 1900’s in iron ore mines in Michigan, USA It was developed over the years from a method originally known as short hole bench and train miningGenerally a large scale open stoping method, it is often referred to as long hole or blast hole stoping A Typical Sublevel Open Stoping OperationSublevel open stoping QueensMineDesignWiki
Vertical crater retreat QueensMineDesignWiki
Vertical crater retreat (VCR), also known as Vertical retreat mining, is an open stoping, bottomup mining method that involves vertically drilling largediameter holes into the orebody from the top, and then blasting horizontal slices of the orebody into an undercut A system of primary and secondary stopes is often used in VCR mining, where2021年3月5日· Mining methods at the Rook 1 uranium project The current mining plan based on the feasibility study uses a 03% U 3 O 8 cutoff 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 24mRook 1 Uranium Project, Saskatchewan, Canada Mining
Major Mines & Projects | KupolDvoinoye Operation
The Kupol deposit is mined by an underground mining method, long hole longitudinal retreat sublevel open stoping, also known as the Avoca method Sills are driven on 15metre (sublevel) spacing approximately 45 metres high Longhole stopes (panels) are drilled using parallel or fan drill holes between the sublevels (approximately 11 metres)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 of 2025 m with 6m rib pillars and 5mMajor Mines & Projects | Lubambe Mine
Study on the longhole raising technique using one blast based on
2018年9月1日· Fig 1 shows the nomenclature used in VCR method, and they are described as follows: Φ is the hole diameter, L is the charge length, d b is the depth from the surface to the centre of gravity of the charge, ie, depth of burial When d b is such that the maximum volume of rock is broken, this burial is called the optimum depth of burial d2010年2月1日· small mines around the world Shrinkage stoping is a shorthole mining method which is most suitable for steeply dipping orebodies (70° 90°) Also, the blasted ore must not be affected by(PDF) Underground mining Methods ResearchGate