Lapa Mining Method - 26m Longitudinal Retreat AGNICO EAGLE 4.2m . Title PowerPoint Presentation Author George Dikho Created Date 312013 102646 AM
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
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 mines entrance. After the pillars are removed the
2 Room Bor d-and-Pillar mining or con tinuous mining method It is the most common supported pillar method designed and used primarily for mining flat-lying
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
Longhole mining methods such as Avoca or longhole retreat as practiced at the Musselwhite mine of Placer Dome employs 100 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
Mining Conventional open cut and conventional mechanised underground mining methods. Processing Crushing high-pressure grinding ball mills CIL. Ore Reserve 100 65.7Mt grading 1.77gt for 3.74Moz of contained gold. Mineral Resource 100 136.2Mt grading 1.76gt for 7.70Moz of contained gold As at 31 December 2018.
By way of an example using a ring pattern for sublevel cave mining with a toe spacing of 2.7 m 8.9 ft with a 2.4 m 7.9 ft burden between rings - with the longest hole in the ring having a length of 30.5 m 100 ft and using the rectilinear figure the volume would be 198 m 3. With this volume as common to the other figures the radial .
Mining retreats horizontally as successive vertical slices are blasted. Vertical block mining is the term most often used for this method. In VBM the workplace is divided into a series of vertical blocks and the blocks may be nined on a retreat basis working from the ends of the workplace.
EAGLE RIVER MINING COMPLEX . INCLUDING THE EAGLE RIVER GOLD MINE . THE MISHI GOLD MINE AND RELATED INFRASTRUCTURE According to Regulation 43-101 and Form 43-101F1 LOCATION . Mishibishu Lake Area and Point Isacor . Sault Ste Marie Mining Division . Province of Ontario Canada . Prepared for Wesdome Gold Mines Ltd. 8 King Street East Suite 811
operation. Narrow vein longitudinal retreating mining methods are especially susceptible to hanging wall and footwall dilution due to the wall overbreak. Understanding the factors which influence the stability of these walls can help a mining engineer design stopes that minimize dilution.
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 .
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.
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.
Transverse Longhole Stoping is a popular large scale underground mining method known for its ability to simplify stope sequencing. It is an open stoping method and is very similar to sub-level open stoping Longitudinal longhole retreat and blast hole stoping.