Stull stoping is a form of stoping used in hardrock mining that uses systematic or random timbering ("stulls") placed between the foot and hanging wall of the vein. The method requires that the hanging wall and often the footwall be of competent rock as the stulls provide the only artificial support. This type of stope has been used up to a depth of 3,500 feet (1,077 m) and at intervals up to 12 feet (3.7 m) wide. The 1893 mining disaster at Dolcoath minein Cornwall was caused by failure of the stulls holding up a huge
Countermeasure Method For Stope Instability In Crown. 2016317pillar thickness will increase crown pillar stability yet reduce mining recovery because part of crown pillar is formed by ore bodyPreventing . stope failure is the key to maintain stability and optimie recovery of crown pillar.
Other articles where Stope is discussed: mining: Underground mining: of extracting ore are called stopes or rooms. There are two steps involved in stoping. The first is development—that is, preparing the ore blocks for mining—and the second is production, or stoping, itself. Ore development is generally much more expensive on a per-ton basis than stoping, so that every effort
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
Mar 09, 2018· 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. Direct operating costs for room-and-pillar method range from $5-$20/tonne. Some variations of the room-and-pillar mining method include post room-and-pillar mining and step room-and-pillar mining.
Stope-and-Pillar Design for the Elliot Lake Uranium Mines the Ontario Department of Mines appointed a committee to study the accident situation and mining methods used in the uranium mines in the E1liot Lake district. Pillars Pillar, rock mechanics, stope, syncline, Extraction, Mine, Mines, mining, pillar, Pillars, stope, stopes, stress
Feb 01, 2010· Room-and-pillar mining method has a low recovery rate (a large percentage of ore remains in place underground ). In many room and pillar
Table of ContentsFactors Affecting Choice of MethodReview of Stoping MethodsUnderhand Stoping Mining MethodOverhand Stoping MethodLongitudinal Back, Flat-Back Mining MethodLong-Wall StopingmMining MethodRill-Cut Stoping MiningSaw-Tooth Back StopingShrinkage StopingMining by Combination StopingSide StopingBreast StopingSublevel StopingSquare-Set StopingFilling MethodsCaving Methods
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
Mar 09, 2018· 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. Direct operating costs for room-and-pillar method range from $5-$20/tonne. Some variations of the room-and-pillar mining method include post room-and-pillar mining and step room-and-pillar mining.
The first section gives an overview of underg round mining methods and practices as used commonly in underground mines, including classification of underground mining methods and brief explanations of the techniques of room-and-pillar mining, sublevel stoping, cut-and-fill, longwall mining, sublevel caving, and block caving. The second
Stope-and-Pillar Design for the Elliot Lake Uranium Mines the Ontario Department of Mines appointed a committee to study the accident situation and mining methods used in the uranium mines in the E1liot Lake district. Pillars Pillar, rock mechanics, stope, syncline, Extraction, Mine, Mines, mining, pillar, Pillars, stope, stopes, stress
Room and pillar is an underground mining method that has applications to a wide variety of hard-rock deposits worldwide. It is commonly classified as an open-stoping method, meaning that development involves mining out underground cavities while leaving the
INTRODUCTION The sublevel stoping mining method is usually applied to a relatively steeply dipping, competent ore body, surrounded by competent wall rock. Ore is produced by drilling and blasting longholes, which can range from 50 mm (2 in.) to 200 mm (7% in.) diam, with lengths up to 90 m (300 ft).
The invention relates to the technical field of stoping methods and particularly relates to an underhand sublevel open stoping method. The underhand sublevel open stoping method comprises the following steps: firstly, arranging an ore block along the direction of an ore body and dividing the ore block into an ore room and an ore column; dividing the ore block into 3-5 sublevels in the vertical
Nov 02, 2011· 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) Square-set stoping 6) Shrinkage stoping 7) Long-hole Open
Breast stoping: it is an open stoping method often used for mining gently-dipping narrow vein orebodies with thickness between 1.5 and 3 m and irregular floor. Ore and surrounding rock should be at a minimum, moderately competent. This method also has to leave pillar. 2 Geology and technical conditions of mining at Kafang Mine
Table of ContentsStopingStope-Development MethodsRaisesCost of Driving Raises Stoping The foregoing discussion relates to general mine development and covers the work required to reach and penetrate the ore bodies and to provide the main arteries through which the ore is taken from the mine. These arteries provide mine drainage and avenues for travel and transportation of men and supplies
A surface mine was underlied mined-out areas by room-and-pillar stoping method. The harmonic mechanical load was acting on the center of the roof surface of the mined-out areas; its vibration frequency is 0.1 Hz and load density is 0.29 MPa. The width and the height of the mined-out areas is 10 m × 10 m, respectively, and the width of the
Nov 09, 2017· Subject :GEOLOGY Course :ENERGY RESOURCES AND MINERAL EXPLORATIONS Keyword : SWAYAMPRABHA
Stope-and-Pillar Design for the Elliot Lake Uranium Mines Export Citation × Citation (Style = APA) Hedley, D.G.F. ; Grant, F. (1972). "In 1958, the Ontario Department of Mines appointed a committee to study the accident situation and mining methods used in the uranium mines in the E1liot Lake district. This committee reviewed the existing
• Similar to room and pillar except: • pillars are irregular shaped and spaced. • deposit is thick(>20 ft). • Most popular underground mining method in us for non-coal operations • can be adapted to dipping seams (pitch mining) or very thick seams (bench mining) • usually, conventional production cycle is
Room and Pillar Stoping. Post pillars are reserved in the stope for support. According to the depth of blasting holes, there are two mining methods: short-hole room and pillar stoping; medium- and deep-hole room and pillar stoping. The former adopts short-hole rock drill for orebodies with a thickness of less than 3-4m, and ore is transported
Room and Pillar Stoping. Post pillars are reserved in the stope for support. According to the depth of blasting holes, there are two mining methods: short-hole room and pillar stoping; medium- and deep-hole room and pillar stoping. The former adopts short-hole rock drill for orebodies with a thickness of less than 3-4m, and ore is transported
A surface mine was underlied mined-out areas by room-and-pillar stoping method. The harmonic mechanical load was acting on the center of the roof surface of the mined-out areas; its vibration frequency is 0.1 Hz and load density is 0.29 MPa. The width and the height of the mined-out areas is 10 m × 10 m, respectively, and the width of the
The invention relates to the technical field of stoping methods and particularly relates to an underhand sublevel open stoping method. The underhand sublevel open stoping method comprises the following steps: firstly, arranging an ore block along the direction of an ore body and dividing the ore block into an ore room and an ore column; dividing the ore block into 3-5 sublevels in the vertical
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.
Stope-and-Pillar Design for the Elliot Lake Uranium Mines Export Citation × Citation (Style = APA) Hedley, D.G.F. ; Grant, F. (1972). "In 1958, the Ontario Department of Mines appointed a committee to study the accident situation and mining methods used in the uranium mines in the E1liot Lake district. This committee reviewed the existing
Room and Pillar; Longwall; Cut and fill stoping is a method of underground mining used in vertical stopes and in mining high-grade irregular ore bodies. The rock mass surrounding the ore deposit is also usually weak unable to support loads over an extended stoping height. As the name of the method implies, successive cutting of the ore into
Breast stoping: it is an open stoping method often used for mining gently-dipping narrow vein orebodies with thickness between 1.5 and 3 m and irregular floor. Ore and surrounding rock should be at a minimum, moderately competent. This method also has to leave pillar. 2 Geology and technical conditions of mining at Kafang Mine
Post Room-and-Pillar Mining. Post room-and-pillar mining (or "post-pillar" mining) is a combination of room-and- pillar and cut-and-fill stoping. With this method, ore is recovered in horizontal slices starting from the bottom and advancing upward. Pillars are left inside the stope to support the roof.
All the advantages of bord-and-pillar mining make this method sound like the ultimate cost effective and efficient mining method, but there are major restrictions to its application, e.g.: The thickness of the orebody in relation to the machine The stoping will consist of three phases.
Primary Mining Method Cut-and-Fill mining method. Information. Development in the ore of the upper and lower drift. The distance between the levels is 91 m (300 ft). Development of the service raise. Excavation of the stope. Two options: the first option consists in starting the stope from the level.
Oct 22, 2014· Room and Pillar Mining Method 1. Hassan Z. Harraz [email protected] 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.
• Similar to room and pillar except: • pillars are irregular shaped and spaced. • deposit is thick(>20 ft). • Most popular underground mining method in us for non-coal operations • can be adapted to dipping seams (pitch mining) or very thick seams (bench mining) • usually, conventional production cycle is
Laubscher (1977). Applied pillar design work has developed from early coal mining with applied design curves developed by Lunder (1994) and used internationally. Extensive work in areas of drift and stope openings and pillar design have been conducted in Australia and Canada with some of the most widely
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