A stope stability assessment was completed using the Mathews Method based on the initial stope dimensions for transverse (15-60 m by 20 m by 30 m high) and longitudinal (5-15 m by 60 m by 30 m high) longhole mining as proposed in the AMEC Scoping Study. 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 .
Oct 23, 2014· Caving Underground Mining Methods (longwall, Sublevel caving, & Block caving) 1. This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors. The following conclusions are drawn from the field monitoring data, which provide valuable information to better understand the load transfer mechanics associated with longwall retreat mining. Mining depth is a key factor controlling the range of mining-induced stress. The greater the depth, the greater the range of the mining-induced stress.
Longhole Stoping at the Asikoy Underground Copper Mine in Turkey Alper Gönen Mining Engineering Department, Dokuz Eylul University, úzmir, Turkey 1. Introduction Asikoy underground copper mine is located in Küre county, some 60 km north of Kastamonu province and 25 km from Black Sea cost. Underground mining method is 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 all ...
DU311 is a center-articulated, carrier-mounted in-the-hole (ITH) drill rig designed for high mobility and utility in underground mining. This compact machine was developed with an on-board reciprocating booster for the productive drilling of holes with … Jan 31, 2018· Çayeli's mine design is based on underground bulk mining methods with the use of delayed backfill to extract ore in a sequential manner. The primary mining method is retreat transverse and longitudinal long hole stoping with paste fill and loose or consolidated waste rock backfill.
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 … The Temporary Rib Pillar (TRP) mining method was developed by Orica to take advantage of fully wireless blast initiation. Musselwhite utilizes both conventional and modified Avoca mining methods depending on the access available for that retreat. Retreats without a secondary access are mined utilizing modified Avoca. With
Eagle Mine215 Кб. This method provides the cost advantages of bulk mining, while maintaining a degree of selectivity and operational flexibility. The majority of the stopes will be mined as transverse bench and fill stopes, with some thinner thickness zones of the orebody mined as longitudinal retreat … Mining at Rook I uranium project. The Rook I uranium project will employ transverse stope mining and longitudinal retreat stope mining methods for extracting ore. The Arrow deposit is proposed to be accessed by using two shafts, including a production shaft and a ventilation shaft.
Mar 23, 2014· Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping and often requires the development of a rise or slot prior to production blasting. 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.
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 large-scale underground 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.
Lapa is a high-grade gold mine and uses two mining methods – longitudinal retreat with cemented backfill, and locally transverse open stoping with cemented back-fill. There are three distinct geological units pertinent to rock mechanics at the mine namely, ultramafic, volcanic and sediment units. The most severe squeezing conditions technical report and preliminary economic assessment of the upper beaver gold-copper deposit kirkland lake, ontario, canada for queenston mining inc.
Apr 02, 2019· Three mining methods are used at the Yalea and Gara underground mines. They are long hole transverse open stoping; long hole longitudinal retreat open stoping; and stoping under rock fill (SURF). SURF mining is planned to be introduced in the weathered areas of Yalea South Upper. Development and production scheduling of a wholly made-up resource beneath the former CSM test mine. The mining method employed was longitudinal retreat, with cemented…
Underground Mining Methods By Hans Fernberg [email protected] Underground Mining Methods Why underground mining? Generally,depending on orebody geometry, waste / ore ratio increases as open pit mining goes deeper Eventually reaching a break-even situation where underground mining gets more favourable and profitable Environmental aspects Surface mining … The net energy savings presented by a VOD system including up-front capital costs typically are on the order of 1% of total mining and milling costs on a per-tonne basis. Therefore, considering the average mine's profitability the implementation of VOD can increase net profit by 10% or more.
Factors influencing overbreak in narrow vein 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 Jun 01, 2007· Phase 4 mining began in the first half of 2005 and will continue at a rate of 659,000 t/y until 2011. Where mining widths are greater than 15.0 m, transverse stopes are developed. Where mining widths are less than 15.0 m, longitudinal retreat methods are employed. Production from the PQ zone began in September 2003 at a planned rate of 550 t/d ...
The essential geomechanical features of longwall and caving methods of mining were outlined in Chapter 12. Longwall and caving methods are distinguished from other mining methods by … thesis is a case study of the Lapa Mine of Agnico Eagle Mines Limited, a gold mining operation situated in the Abitibi region of Quebec. The Lapa orebody is a narrow vein, steeply dipping deposit with varying width, and is extracted with longitudinal retreat mining method.
Compared to other mining methods, room-and-pillar mining is a low-cost method with a low recovery rate (since some ore is left behind in pillars). Yet, the method causes very little dilution as the contact between ore and waste is limited due to the waste being on top and ore being at the bottom. During the visit, the mine was putting more emphasis on the narrow-vein mining method. The method used at David Bell mine is the Alimak mining method. However, for narrower veins, the longitudinal retreat mining is used. The selection criteria for the Alimak mining method are numerous. The main one is based on economic and the other ones are:
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. Three mining methods, including blind longitudinal retreat, transverse sub-level open stoping and longitudinal sub-level open stoping, have been shortlisted to conduct mining at the project. The depth and the thickness of the mine will enable the implementation of low-cost mechanised underground mining methods.
Initial plans are to use the longitudinal retreat long-hole mining method referred to as Avoca or Bench-and-Fill mining. Production levels are set every sixty or seventy-five meters according to the local vertical continuity, and mining sublevels are spaced at fifteen meters. Production is projected at 300 tons per day following a short ramp-up ... 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
Longitudinal Retreat Mining: A method of mining an orebody beginning at one stope and gradually mining new stopes towards the central ore-handling system. Long-hole open stope: A method of mining involving the drilling of holes up to 90 feet long into an ore body and then blasting a slice of rock which falls into an open space.