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Underground mining shrinkage methods

  • Appendix C Mining Methods - April 2014

    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 1.2 to 4.5 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.

  • Topic 9: Mining Methods Part V- Underground Mining

    Underground Mining Methods Flow Chart (modified from Brown, 2003) Like shrinkage stoping, underhand stoping is most suitable for steeply dipping ore bodies.[5] Because of

  • Choice of Method - Welcome to the Narrow-Vein Mining Project

    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.

  • Methods of Underground Mining Bit Service Company

    Feb 27, 2020· 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.

  • Underground mining block caving, bore hole, drift fill

    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 self-advancing hydraulic ceiling supports. Retreat mining is the last phase of a common type of coal mining technique referred to as room and pillar mining.

  • Underground Mining Techniques and Risks Geology for

    Oct 17, 2019· Underground mining terminology and layout. raising the level of the mining; shrinkage stoping similar to cut and fill except the ore is blasted and left in place and used as a mining platform. The most common mining method is longwall mining which is largely automated using a self-advancing coal shearer including hydraulic roof

  • Here are the Types of Underground Mining and Their

    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 sub-level stopping, this technique is carried out in vertical ore deposits

  • SECTION 10 SHRINKAGE METHODS Mike Turner Australian

    Shrinkage mining was a common stoping method prior to mechanised mining and the introduction of hydraulic fill. Sub-level stoping, cut and fill mining and sub-level caving have generally replaced shrinkage mining in Australia, Europe and Canada.

  • CN101881169A - Sublevel shrinkage caving stage open stope

    The invention discloses a sublevel shrinkage caving stage open afterwards filling mining method. In the earlier stage of stoping, caved ores are utilized to support surrounding rocks on a top tray, and in the later stage of stoping, a goaf area is filled with fillers to control ground pressure so as to achieve safe and efficient mining.

  • Types of Mining Methods Sell Side Handbook

    Mar 09, 2018· A highly productive underground mining method, longwall mining is used in a large horizontal spread of thin-bedded deposits of uniform thickness usually ranging from 0.6m to 1m. Used a lot by South African gold mining companies, this method can be used in both soft and hard rocks as the working area along the mining face can be supported

  • Techniques in Underground Mining - ILO Encyclopaedia

    Shrinkage stoping. Shrinkage stoping may be termed a classic mining method, having been perhaps the most popular mining method for most of the past century. It has largely been replaced by mechanized methods but is still used in many small mines around the world.

  • Underground Mining Methods and Equipment

    1. Underground Mining Methods 1.1. 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

  • (PDF) Underground mining Methods - ResearchGate

    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

  • Shrinkage Stoping - Oraee

    Shrinkage is perhaps of lowest level of mechanizabilty amongst all underground mining methods. Walls support in the stope can be accomplished by using rock bolts or leaving pillars. If pillars are left in the stope, they should be as small as possible and to be left in vertical succession between draw points so that the flow of ore downward is

  • UNDERGROUND MINING - Underground mining and mining machinery

    Underground Mining. Underground methods unsupported, sup­ported, and caving are differentiated by the type of wall and roof supports used, the configuration and size of production openings, and the direction in which mining operations progress. Shrinkage stoping is more suitable than sublevel stoping for stronger ore and weaker

  • Shrinkage Stoping - Introduction to Shrinkage Stoping

    GENERAL DESCRIPTION Shrinkage or shrinkage stoping refers to any mining method in which broken ore is temporarily retained in the stope to provide a working platform and/or to offer temporary support to the stope walls during active mining. Since ore "swells" when broken, it is necessary to shrink the muck pile a corresponding amount by draw

  • Underground Mining Methods EXCELLENCE IN MINING

    Underground mining is the process of extracting minerals and ores that are located too far underground to be mined efficiently using surface mining methods. The primary objective of underground mining is to extract ore safely and economically while minimizing handling of waste rock. Typically, underground mine has less environmental impact.

  • 12. Mining methods and method selection

    12.4 Underground mining method 2) In soft rock: coal mine -Mechanical ploughing or shearing on the coal seam ®loading the broken ore on to a chain conveyer ®advancing the hydraulic roof supports ®roof collapsing behind the supported area. 12.4 Underground mining method

  • 8.3.2: Shrinkage Stoping ABC 123: Testing Site / Course

    Source: Underground Methods Although not shown, a shaft has been sunk on the footwall side of the deposit, and among other development workings a haulage drift has been driven, and then crosscuts into the orebody. Next, draw points and chutes were constructed by

  • Digging deeper: Mining methods explained Anglo American

    The underground mining methods we use include room and pillar, narrow vein stoping and large-scale 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

  • New Technology of Preventing and Controlling Underground

    New technologies of preventing and controlling underground water hazards in non-coal mines Methods of prevention and treatment of mine water are generally divided into three kinds, dredging, plugging, and avoiding. A comprehensive program in practical applications often uses a basic method and some supplementary methods.

  • What Are The Primary Methods of Underground Mining? - GRT

    May 21, 2019· It is currently one of the most innovative mining methods in the industry. This method of mining is usually implemented when it is no longer viable to mine in an open mine. The procedure involves drilling vertically downwards directly into the ore. This is followed by drilling sub levels horizontally at consistent intervals (as shown in figure 1).

  • Underground Mining Methods Research Papers - Academia.edu

    Shrinkage Stoping Methods . Save to Library. Download. information, underground mining have been selected there to extract the deposit. In this paper, our concern is about shaft sinking method for underground mining. Depths of the coal seams reveal the necessity of

  • Underground mining methods handbook (Book) OSTI.GOV

    @article{osti_6831532, title = {Underground mining methods handbook}, author = {Hustrulid, W A}, abstractNote = {Sections discuss: mine design considerations; stopes requiring minimum support (includes room-and-pillar mining and sublevel stoping); stopes requiring some additional support other than pillars (includes shrinkage stoping, cut-and-fill stoping, undercut-and-fill mining, timber

  • Shrinkage Stope Mining, Mining Methods, Mining Techniques

    When correctly planned and executed, shrinkage mining is a very effectual technique for ore mining and underground construction. It is used where the hanging and footwalls of the excavation are strong sufficient to be self supporting, although artificial support like rock and cable bolts might be installed as shrinkage progresses.

  • CUT-AND-FILL MINING

    The broken ore is loaded into the ore pass and the stope (face) is therefore cleaned completely unlike all other underground mining methods. After each slice is taken, the vacated volume is filled, in order to support the walls and to provide a working platform. The fill will perform both duties much more effectively than that in shrinkage method.

  • Underground Mining Methods - MineralsEd

    The backfill underground serves to keep the mine walls stable and also as the floor for mining the next slice. Mining continues upwards towards the sur-face until the orebody is depleted. Sublevel stoping Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is

  • The Best Methods for Underground Mining - Industry Tap

    Apr 14, 2021· Shrinkage Stoping. The shrinkage stoping method is utilized to get back any steep ore bodies when the primary ore or rock is competent. A mines huge production section is the perfect place for this method. This mining method is also known as a classic mining method as it was a smart mining tech for most of the time in the past.

  • Underground mining methods - SlideShare

    Apr 14, 2014· Following are considered as unsupported methods; (1)Room-and-pillar mining. (2) Stope-and-pillar mining. (3)Shrinkage stoping. (4)Sublevel stoping. 11. (1)Room-and-pillar mining method: Room-and-pillar mining is very old method applied to horizontal or nearly horizontal deposits that has been adopted and refined over the years.

  • Underground Mining Methods Handbook - Mining Books

    Underground Mining Methods Handbook by W.A. Hustulid, Editor Society of Mining Engineers 1982 - 1794 Pages. General Mine Design Considerations; Introduction. Recovery of Pillars Between Blasthole Shrinkage and Sublevel Stopes at the Pea Ridge Mine. Vertical Crater Retreat: An important New Mining Method

  • Underground Mining Methods: Engineering Fundamentals and

    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.

  • 4.3.2: Underground Mining Methods ABC 123: Testing Site

    Underground mining methods become necessary when the stripping ratio becomes uneconomical, or occasionally when the surface use of the land would prohibit surface mining. Underground methods are traditionally broken into three classes: unsupported, supported, and caving methods.

  • Underground Mining Methods and Equipment

    1. Underground Mining Methods 1.1. 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

  • Stoping - Wikipedia

    In shrinkage stoping, mining proceeds from the bottom upwards, in horizontal slices (similar to cut and fill mining), with the broken ore being left in place for miners to work from.

  • Shrinkage stoping - QueensMineDesignWiki

    Shrinkage stoping is a mining method used for steeply dipping, narrower ore bodies with self supporting walls and ore. It is an overhand mining method that relies on broken ore being left in the stope to be used as the working floor and to support the walls.

  • SECTION 10 SHRINKAGE METHODS Mike Turner Australian

    Shrinkage mining was a common stoping method prior to mechanised mining and the introduction of hydraulic fill. Sub-level stoping, cut and fill mining and sub-level caving have generally replaced shrinkage mining in Australia, Europe and Canada.

  • Types of Underground Mining Method Comparison

    Shrinkage stoping. Combination stoping. Breast stoping. Side stoping. Sublevel stoping. Square-set 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.

  • Underground Mining Methods Coal Mining Mining

    Almost all underground mines are less than 1,000 feet deep, but some mines This drawing depicts the room and pillar method of underground mining. Most underground coal is mined by the room and pillar method, whereby rooms are cut into the coal bed leaving a series of pillars, or columns of coal, to help support the mine roof and control the

  • The Stoping Method Mineral Production Activities

    13. The stoping method of mining. The stoping method used in a U/G mine is also referred to as the mining method, even though stoping is only one part of the mining process. It is the phase which yields most of the ore produced. Selection of stoping method is one of the most important parts of U/G mine design and is influenced by:


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