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Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping is used when the country rock is sufficiently strong not to collapse into the stope, although in most cases artificial support is also provided.. The earliest forms of stoping were conducted with hand tools or by firesetting; later gunpowder ...
The Mt Wright Underground Mine is located near the town of Ravenswood in North Queensland and is operated by Carpentaria Gold – a wholly owned subsidiary of Resolute Mining Limited. Following the evolution of the mine plan through a number of stages, the ''sublevel shrinkage (SLS) with continuous fill'' mining method was implemented in 2010 ...
Mining 101 Underground Mining Methods. In 2005, only 17% of metal mines were underground operations (Raw Materials Data, Stockholm 2010) – but there are many instances where underground extraction of minerals is more costeffective than surface mining, typically when the given ore body is high grade or very deep.
1. Underground Mining Methods Classification of Underground Mining Methods Mineral production in which all extracting operations are conducted beneath the ground surface is termed underground mining. Underground mining methods are usually employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great ...
Underground Mining Choice of mining method Underground Mining Methods Soft rock Mining Methods Blast mining Shortwall mining Coal Skimming (or Sink and Float) method Hard rock Mining Methods Stoping 1) Room and pillar 2) Bench and Fill (B F) stoping 3) Cut and Fill (C F) stoping 4) Stull stoping 5) Squareset stoping 6) Shrinkage stoping 7 ...
Australian Centre for Geomechanics Underground Mining Methods Mike Turner Shrinkage Methods Section 10, Page 3 INTRODUCTION In shrinkage stoping the ore is generally mined in horizontal slices, starting from the bottom and advancing updip. The hangingwall and footwall are supported by broken ore left in the mined out stope.
The shrinkage method is not a common practice anymore because the majority of the new mining blocks at the #3 shaft, between 960 m and 1818 m (3150 ft and 5965 ft), have ground pressures that do not allow this type of mining.
The discussion of specific underground mining methods is organized based on the type and degree of support required in mining operations: pillar supported, artificially supported, and unsupported. Case studies are presented on mining methods at the Kristeneberg Mine (cutandfill) and the Mouska Gold Mine (shrink stoping).
Shrinkage stoping is a flexible mining method for narrow ore bodies that need no backfill during stoping. Long wall mining consists of multiple coal shearers mounted on a series of selfadvancing hydraulic ceiling supports. ... Other underground mining methods include Hard rock mining, bore hole mining, drift and fill mining, long hole slope ...
Mining Mining Blasthole stoping: When the dip of a deposit is steep (greater than about 55°), ore and waste strong, ore boundaries regular, and the deposit relatively thick, a system called blasthole stoping is used. A drift is driven along the bottom of the ore body, and this is eventually enlarged into the shape of a trough. At the end of the trough, a raise is driven to the drilling ...
Other articles where Shrinkage stoping is discussed: mining: Shrinkage stoping: Shrinkage stoping is used in steeply dipping, relatively narrow ore bodies with regular boundaries. Ore and waste (both the hanging wall and the footwall) should be strong, and the ore .
May 18, 2018· Sublevel Caving Mining Method Duration: 3:06. Black Diamond Drilling Services Australia PTY LTD 12,599 views
A classification of stoping methods based upon method of support was adopted by the Mining Division of the Bureau of Mines in 1928. This classification has been used ever since as a basis for describing methods in its publications dealing with mining methods and costs and is as follows: Classification of stoping methods. A. Stopes naturally ...
Jan 27, 2014· Underground mining terminology and layout. Image: CC. ... Access from the surface is via a shaft or a decline. There is a variety of mining methods used, often in the same mine, depending on the geometry of the orebody and the stability of the rock. ... raising the level of the mining; shrinkage stoping – similar to cut and fill except the ...
Shrinkage stoping is similar to the cut and fill method, except instead of filling each level to act as a support, the blasted, broken ore is left in the resulting space to act as a support for the next level. After all the levels are blasted, the ore is then removed. This underground mining method is a good option for steep ore bodies.
Oct 23, 2014· Shrinkage and Vertical Crater Retreat Stoping 1. Hassan Z. Harraz hharraz2006 2014 2015 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.
Underground Mining Methods presents the latest principles and techniques in use today. Reflecting the international and diverse nature of the industry, a series of mining case studies is presented covering the commodity range from iron ore to diamonds extracted by operations located in all corners of the world. Industry experts have contributed 77 chapters.
Description of Mining Methods Shrinkage Stoping Shrinkage stoping is applicable to ore zones that are dipping at least 55 degrees and that range in width from roughly to meters. The enclosing waste rock must be competent and not subject to failure so that when the ore is drawn from the stope, dilution is kept to a minimum.
May 22, 2020· Other methods include shrinkage stope mining, which is mining upward, creating a sloping underground room, long wall mining, which is grinding a long ore surface underground, and room and pillar mining, which is removing ore from rooms while leaving pillars in .
In underground retreating longwall coal mining, hard roof collapse is one of the most challenging safety problems for minedout areas. Identifying precursors for hard roof collapse is of great ...
The underground mining methods we use include room and pillar, narrow vein stoping and largescale mechanised mining. Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with massive square pillars between them .
Shrinkage stoping may be termed a " classic" mining method, having been perhaps the most popular mining method for mos t of the past century . It has largely been replaced by mechaniz ed ...
The method to be used for underground mining depends on the concentration of ore, strength of the surrounding rock, and the various risks involved. ScienceStruck explains what these methods are, with the applications of each one. ... Shrinkage Stoping. Similar to sublevel stopping, this technique is carried out in vertical ore deposits ...
Shrinkage stoping. Combination stoping. Breast stoping. Side stoping. Sublevel stoping. Squareset stoping. Filling methods. Underhand Stoping Mining Method. The method of underhand stoping in which the ore is drawn to the level above (B, Fig. .1), is called Cornish stoping.
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