Stope mining Britannica

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

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(PDF) Rib pillar design in open stope mining

The approach involves an empirical method for pillar design and a discusion of the pillar stability used for open stope mining methods. The empirical method predicts the stability of rib pillars.

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Stope-and-Pillar Design for the Elliot Lake Uranium

Stope-and-Pillar Design for the Elliot Lake Uranium Mines CIM Bulletin, 1972 D. G. F. HEDLEY and F. GRANT, Research Scientists, Mining Research Centre, Mines Branch, Department of Energy, Mines and Resources, Elliot Lake Laboratory, Elliot Lake, Ontario . In 1958, the Ontario Department of Mines appointed a committee to study the accident

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Stope-and-pillar mining English to Russian Geology

Stope-and-pillar mining (a stope is a production opening in a metal mine) is a similar method used in non-coal mines where thicker, more irregular ore bodies occur; the pillars are spaced randomly and located in low-grade ore so that the high-grade ore can be extracted.

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Stoping Mining Methods MetallurgistMineral

2020-7-14  After active mining has been completed to the level above or to the floor pillar, the rest of the broken ore is drawn off from below, leaving the stope empty. It may be filled with waste later to prevent general movement and subsidence or to permit mining of pillars left between stopes during the first mining.

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Types of Underground Mining Method Comparison

2020-7-16  To start the stope, if the ore is low grade and timber is scarce, a pillar or pillars are left above the level as shown in A, and if the ore is high grade it is all removed above the level and stulls are placed as shown at B. To start a stope as shown at B, a cutting out or lead stope is broken immediately above the level as shown at D, Fig. 2.

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Crown pillars QueensMineDesignWiki

2019-6-28  A crown pillar, defined as a rock mass situated above an uppermost stope of the mine, can be one of two types: a “surface crown pillar” and “crown pillar between open pit and underground” . Both types of crown pillars have similar purposes to protect the surface land and the underground mine, and those working in it from inflows of

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Hard-rock room and pillar QueensMineDesignWiki

2019-6-28  Background. Room and pillar is one of the oldest existing mining methods, dating back over 1000 years. In its early use, detailed stope planning was very uncommon and mine operators would typically follow apparent high grade areas, leaving pillars only when necessary to stabilize openings.

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Initial effects of improved drill and blast practices on

Bulyanhulu is a narrow-vein gold mine employing longitudinal longhole open stoping. The mining front retreats towards a central pillar for each panel. Sill pillars are left between the mining panels. In most areas, there have been efforts to extract 100% of the ore in each panel by placing paste backfill before mining adjacent stopes.

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Bord-and-pillar mining in inclined orebodies

2009-8-27  pillar mining is thus considered as a supplement to conventional mining, which accounts for the majority of current mining operations on Amandelbult. Bord-and-pillar mining is applicable to horizontal to flat dipping thin tabular orebodies where the surrounding hangingwall and the ore itself are

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(PDF) Open Stope Mining in Canada ResearchGate

Open stope mining is the most common mining method employed in underground, hard rock mines in Canada. It is characterised by relatively small, single lift stopes (20,000 to 100,000 tonnes), and

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Stope-and-pillar mining English to Russian Geology

Stope-and-pillar mining (a stope is a production opening in a metal mine) is a similar method used in non-coal mines where thicker, more irregular ore bodies occur; the pillars are spaced randomly and located in low-grade ore so that the high-grade ore can be extracted.

get price

(PDF) Rib pillar design in open stope mining

The approach involves an empirical method for pillar design and a discusion of the pillar stability used for open stope mining methods. The empirical method predicts the stability of rib pillars.

get price

Stope-and-Pillar Design for the Elliot Lake Uranium

Stope-and-Pillar Design for the Elliot Lake Uranium Mines CIM Bulletin, 1972 D. G. F. HEDLEY and F. GRANT, Research Scientists, Mining Research Centre, Mines Branch, Department of Energy, Mines and Resources, Elliot Lake Laboratory, Elliot Lake, Ontario . In 1958, the Ontario Department of Mines appointed a committee to study the accident

get price

Development of empirical rib pillar design criterion for

The design of open stope rib pillars has been done using many empirical methods, but none of the methods has been verified with a design survey. This thesis uses data collected in the "Integrated Mine Design Study" to develop an empirical rib pillar design method for open, stope mining. The method is called the "pillar stability graph". The design variables in the method are: the compressive

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The design of stable stope spans for shallow mining

2009-8-26  The design of stable stope spans for shallow mining operations B (joint orientation adjustment factor) and C (gravity adjustment factor) to determine the modified stability number, N’, which is used in the modified stability graph method6, 13–15 for dimensioning of open stopes in mining. A total of 176 case histories by Potvin13 and 13 by Nickson16 of unsupported open stopes are plotted on the

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Pillar Strength in Underground Stone Mines in the United

2012-8-30  pass bench-mining of onthe floor may be carried out. The function of pillars in room-and-pillar mines is to provide spacing both local and global stability. Local stability is conditionsdefined as the provision of stable ribs (pillar [9].walls) and stable roof conditions, allowing safe access to working areas. Falls of ground from the The

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Stoping Mining Methods MetallurgistMineral

2020-7-14  After active mining has been completed to the level above or to the floor pillar, the rest of the broken ore is drawn off from below, leaving the stope empty. It may be filled with waste later to prevent general movement and subsidence or to permit mining of pillars left between stopes during the first mining.

get price

Hard-rock room and pillar QueensMineDesignWiki

2019-6-28  Background. Room and pillar is one of the oldest existing mining methods, dating back over 1000 years. In its early use, detailed stope planning was very uncommon and mine operators would typically follow apparent high grade areas, leaving pillars only when necessary to stabilize openings.

get price

Initial effects of improved drill and blast practices on

Bulyanhulu is a narrow-vein gold mine employing longitudinal longhole open stoping. The mining front retreats towards a central pillar for each panel. Sill pillars are left between the mining panels. In most areas, there have been efforts to extract 100% of the ore in each panel by placing paste backfill before mining adjacent stopes.

get price

Pillar Strength in Underground Stone Mines in the United

2012-8-30  pass bench-mining of onthe floor may be carried out. The function of pillars in room-and-pillar mines is to provide spacing both local and global stability. Local stability is conditionsdefined as the provision of stable ribs (pillar [9].walls) and stable roof conditions, allowing safe access to working areas. Falls of ground from the The

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Technology of back stoping from level floors in

2014-3-1  When the stope face in the primary-mining layer is 1–2 m away from the boundary of pillar in the goaf, high stress can fracture the coal wall seriously and easily cut off the entire roof. The supports in the working face should have sufficient setting load and the speed of cutting coal should be increased.

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Stoping mining Britannica

Stoping, in mining engineering, the opening of large underground rooms, or stopes, by the excavation of ore.Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of ore without caving.In mines where the rock requires no artificial support, the operation is known as open stoping.

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Development of empirical rib pillar design criterion for

The design of open stope rib pillars has been done using many empirical methods, but none of the methods has been verified with a design survey. This thesis uses data collected in the "Integrated Mine Design Study" to develop an empirical rib pillar design method for open, stope mining. The method is called the "pillar stability graph". The design variables in the method are: the compressive

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Evaluation of the Active Support and Yielding Bearing

However, the stiffness coordination relationship between the natural pillar and the stope roof is actually the foundation to achieve yielding support [13, 14]. The artificial pillars are originally applied to replace the natural pillars for increasing the ore recovery rate [15–18]. With the development of mining technology, various categories

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采矿工程 毕业设计_外文翻译 英译汉 中英文_百度文库

ROOM-AND-PILLAR METHOD OF OPEN-STOPE MINING 空场采矿法中的房柱采矿法 Chapter 1.A Classification of the Room-and-Pillar Method of Open-Stope Mining 第一部分,空场采矿的房柱法的分类 OPEN STOPING 空场采矿法 An open stope is an

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Geotechnical approach to stope and pillar optimisation at

Mining methods at GSGM are based on variations of a longhole open stope and room and pillar method. There is no planned backfill. This methodology was originally proposed due to the flat lying nature of the ore lodes. The mining methods used are: Inclined room and pillar. Transverse longhole open stoping. Longhole wall slash.

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Designing an optimal stope layout for underground

An illustration of the stope and pillar layout notations. Moreover, if a mining block is shared among a number of possible stopes, i.e. the mining block exists in more than one stope sets, such combinations are categorized as overlapping stopes. Physical mining constraint restricts the generation of overlapping stopes, and accordingly, avoiding

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Variations in ultra-deep, narrow reef stoping

2009-8-27  stope cooling can be achieved. For example, this may involve a greater or lesser use of the following: more ventilation at stope inlet colder ventilation at stope inlet cold mining water and free discharge over rock surfaces in-stope air coolers. Ever since the introduction of

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EVALUATION OF BORD AND PILLAR MINING SYSTEM IN

2010-5-13  mining and its development correlate closely with cultural progress. Mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials. One of such methods is the Bord and Pillar method of mining. Bord and Pillar method of mining is one of the oldest methods of mining.

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