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The Obuasi Mine - Longitudinal Retreat Mining Method ...

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.

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longitudinal retreat mining method - greenrevolution.org

The mining methods are longhole transversal stoping in 10 metres or more mineralization width, and longitudinal retreat stoping in narrower ore bodies. The mineralized zones put in reserves are of varying thickness, ranging from a few tens of meters to 3 meters, which is the minimum mining width.

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Lapa Mining Method - 26m Longitudinal Retreat

2016-12-12  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

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Types of Mining Methods Sell Side Handbook

2018-3-11  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.

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(PDF) Open Stope Mining in Canada - ResearchGate

The mining method allows for complex stope sequencing. Longitudinal open stope mining, or sublevel retreat (after Potvin and Hudyma, 1989). Much of the development necessary for this mining method...

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Major Mines Projects LaRonde Mine

Two mining methods are used at LaRonde: longitudinal retreat with cemented paste backfill; and transverse open stoping with 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 these two methods has been used.

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Types of Underground Mining Method Comparison

2017-3-16  Longitudinal Back, Flat-Back Mining Method Long-Wall StopingmMining Method. After starting an overhand stope the shape in which the back is carried is often of prime importance. In A, Fig. 2, is illustrated the method of carrying a flat or longitudinal back (the term long-wall is used sometimes when the vein lies nearly flat).

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(PDF) Underground mining Methods - ResearchGate

Underground Mining Methods. Soft rock Mining Methods. Blast mining. Shortwall mining. Coal Skimming (or Sink and Fl oat) method. Hard rock Mining Methods. Stoping. 1) Room and pillar. 2) Bench and ...

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Major Mines Projects Loulo Mine

With the introduction of paste fill the lower areas of the mines are being mined using an underhand (top down) long hole stoping method which retreats to central accesses in an echelon format. Panels are 50 m long, mined as single level stopes (25 m high) and filled with cemented paste fill.

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Lapa Mining Method - 26m Longitudinal Retreat

2016-12-12  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

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Factors influencing overbreak in narrow vein longitudinal ...

2019-10-23  longitudinal retreat mining By Rory Hughes, B.ASc A thesis submitted to McGill University in partial fulfillment of the requirements for the Degree of Master of Engineering Department of Mining and Materials Engineering McGill University Montreal, Quebec, Canada January, 2011 ©Rory Hughes, 2011

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Retreat Mining, Room and pillar mining, Underground

2021-7-15  Retreat Mining. Retreat mining is the last phase of a general kind of coal mining technique referred to as room and pillar mining. In room and pillar mining a mining machine called as "continuous miner" bores a network of chambers or "rooms" into a coal seam, leaving at the back an unexcavated pillar of coal in every room to support the roof of the mine.

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Data mining methods for longitudinal data - UNIGE

2011-9-23  • Detecting temporal changes in event sequences (mining frequent sequences) Blockeel et al. (2001) 2. Using (developing) dedicated tools (e.g. Survival Trees) I will here just briefly comment on an example from the literature De Rose and Pallara (1997) Mining longitudinal data toc kdd long tree seq other ref J I N H 8/12/2004gr 8

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Vertical Crater Retreat Mining Method - mode-design

Longitudinal retreat mining method samatourfr vertical crater retreat mining method vertical crater retreat stoping as applied at the homestake 28 jul 2012 therefore the feasibility of applying the vcr stoping method at the homestake mine was explored vertical crater retreat stoping is a recent innovation in largescale underground mining .

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Major Mines Projects LaRonde Mine

Two mining methods are used at LaRonde: longitudinal retreat with cemented paste backfill; and transverse open stoping with 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 these two methods has been used.

Get Price

Types of Underground Mining Method Comparison

2017-3-16  Longitudinal Back, Flat-Back Mining Method Long-Wall StopingmMining Method. After starting an overhand stope the shape in which the back is carried is often of prime importance. In A, Fig. 2, is illustrated the method of carrying a flat or longitudinal back (the term long-wall is used sometimes when the vein lies nearly flat).

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(PDF) Underground mining Methods - ResearchGate

Underground Mining Methods. Soft rock Mining Methods. Blast mining. Shortwall mining. Coal Skimming (or Sink and Fl oat) method. Hard rock Mining Methods. Stoping. 1) Room and pillar. 2) Bench and ...

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Underground Mining Methods - UFRGS

2009-12-7  Underground Mining Methods and Applications Production Headframe Hans Hamrin* 1.1 INTRODUCTION Ore is an economic concept. It is defined as a concentration of minerals that can be exploited and turned into a saleable product to generate a financially acceptable profit under existing economic conditions. The definition of ore calls for ...

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Major Mines Projects Loulo Mine

The method will be used is expected to provide a more consistent production in the less competent ground. From an operational perspective SURF is very similar to longitudinal sub level caving (SLC). The exception is that in SURF waste rock is tipped into the stope to

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Data mining methods for longitudinal data - UNIGE

2011-9-23  • Detecting temporal changes in event sequences (mining frequent sequences) Blockeel et al. (2001) 2. Using (developing) dedicated tools (e.g. Survival Trees) I will here just briefly comment on an example from the literature De Rose and Pallara (1997) Mining longitudinal data toc kdd long tree seq other ref J I N H 8/12/2004gr 8

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Major Mines Projects LaRonde Mine

Two mining methods are used at LaRonde: longitudinal retreat with cemented paste backfill; and transverse open stoping with 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 these two methods has been used.

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Agnico Eagle Mines Limited - Operations - Operations ...

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, and by the fourth quarter of 2020, the LZ5 production rate was 2,987 tpd, essentially meeting the targeted rate of ...

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Retreat Mining, Room and pillar mining, Underground

2021-7-15  Retreat Mining. Retreat mining is the last phase of a general kind of coal mining technique referred to as room and pillar mining. In room and pillar mining a mining machine called as "continuous miner" bores a network of chambers or "rooms" into a coal seam, leaving at the back an unexcavated pillar of coal in every room to support the roof of the mine.

Get Price

Types of Underground Mining Method Comparison

2017-3-16  Longitudinal Back, Flat-Back Mining Method Long-Wall StopingmMining Method. After starting an overhand stope the shape in which the back is carried is often of prime importance. In A, Fig. 2, is illustrated the method of carrying a flat or longitudinal

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Parameters of Transition from Deepening Longitudinal to ...

2020-6-28  of deepening longitudinal method of mining for steeply dipping strata is the adaptation of the relief when filling external dumps in natural hollows, shallows, or slopes [17,18]. This makes it possible to partially smooth out disturbance to the relief and to some extent restore disturbed agricultural land,

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Underground Mining Methods - UFRGS

2009-12-7  Underground Mining Methods and Applications Production Headframe Hans Hamrin* 1.1 INTRODUCTION Ore is an economic concept. It is defined as a concentration of minerals that can be exploited and turned into a saleable product to generate a financially acceptable profit under existing economic conditions. The definition of ore calls for ...

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Vertical Retreat Mining (VRM) or Vertical Crater Retreat

2021-2-26  The word ‘Retreat’ in ‘Vertical Retreat Mining’ refers to the blasting progression. As each charge is loaded and detonated with this process repeated, the remaining ore to be blasted is "in retreat" upwards until a section of about 7 m to 17 m is left at the top of the stope.

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CHAPTER 11 Mining Technology - Princeton University

2007-3-19  the mining technologies currently in use on Federal leases and the potential for commer-cial mining technologies to extract Federal coal reserves from deep underground seams. The chapter discusses: three surface mining techniques that are used in the West: 1) area strip, 2) open pit, and 3) terrace pit; two methods of underground mining in

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12. Mining methods and method selection

2018-1-30  12.5 Mining method selection-The mining principles and methods have evolved to meet the geomechanical and operational problems of various cases.-Final choice of mining method will reflect both the engineering properties of the orebody and its setting, and the engineering attributes of the various methods such as mining scale, production rate ...

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