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backfilling mining method

Mining with Backfill - QueensMineDesignWiki

2019-6-28  Mining with backfill is a requirement in the industry as it is an important aspect of many mining methods and is a solution to many rock stability issues. When a mine plans to use backfill there are a number of considerations to be made with regards to type of fill, delivery systems and from where the fill will be obtained.

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Backfill - QueensMineDesignWiki

2019-6-28  Mine fill is an integral component of mines' design and method with many operations utilizing backfill as a means to aid the stabilization of mining-related voids and the disposing of mining wastes. Concrete is a common additive to backfill material to improve strength and

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(PDF) Underground mining with backfills - ResearchGate

The backfilling of mines is an integral part of the mining process and requires the same level of attention generally afforded to the more commonly recognised "profit-producing" parts of the ...

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Special Issue "Backfilling Materials for Underground

Dear Colleagues, Backfilling of mined-out areas is a fundamental component of many underground mining operations. The backfill material provides support to the surrounding rock mass, reduces wasteful dilution, enables a safe working area for production activities and mitigates the risk of surface subsidence.

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Cemented Backfilling Mining Technology for Gently

To improve the efficiency and reduce costs of cemented-fill mining, we propose a continuous mining and continuous backfilling (CMCB) method based on the coal resources at the Yuxing mine in Inner Mongolia, China, and constructed a complete filling material transportation system.

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Backfill support’s backfill and operation properties and

2018-6-25  Key words: backfilling coal mining; backfill and operation properties; tamping force; vertical roof gap; horizontal roof gap; evaluation method Cite this article as: ZHANG Qiang, DU Chang-long, ZHANG Ji-xiong, WANG Jia-qi, LI Meng, QI Wen-yue.

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“采充并行”式保水采煤方法 - CHINACAJ 【官网】

The method applies the mining pattern of “backfilling while mining” so it can realize the advantage of fast continuous mining and backfilling mining and a- chieve the work on water-preserved mining.

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Floor damage mechanism with cemented paste

This paper aims to address the coal seam floor behavior after mining with CPB method. Firstly, the numerical model by using Midas/GTS-Flac3d method is developed on the basis of 2353 working face, Daizhuang Coal Mine; then, the slip line field theory of plastic mechanics is applied to calculate the floor damage depth. Furthermore, field observation is carried out by using water injection method.

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Subsidence prediction method of solid backfilling

Guo GL, Zhu XJ, Zha JF (2014) Subsidence prediction method based on equivalent mining height theory for solid backfilling mining. Trans Nonferrous Met Soc China 24(10):3302–3308 CrossRef Google Scholar

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Backfill - QueensMineDesignWiki

2019-6-28  Mine fill is an integral component of mines' design and method with many operations utilizing backfill as a means to aid the stabilization of mining-related voids and the disposing of mining wastes. Concrete is a common additive to backfill material to improve strength and

More

Backfill support’s backfill and operation properties and

2018-6-25  Key words: backfilling coal mining; backfill and operation properties; tamping force; vertical roof gap; horizontal roof gap; evaluation method Cite this article as: ZHANG Qiang, DU Chang-long, ZHANG Ji-xiong, WANG Jia-qi, LI Meng, QI Wen-yue.

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Application Prospect of Backfill Technology for Pillar ...

The wastage of coal during pillar extraction in room and pillar mining method in Pakistan is the biggest issue nowadays. This is the first time to research on it and redesign the mining method with small modifications to reduce the wastage of coal in Pakistan. Backfilling technology is the only technique to reduce the wastage

More

Subsidence prediction method of solid backfilling

Guo GL, Zhu XJ, Zha JF (2014) Subsidence prediction method based on equivalent mining height theory for solid backfilling mining. Trans Nonferrous Met Soc China 24(10):3302–3308 CrossRef Google Scholar

More

Floor damage mechanism with cemented paste

This paper aims to address the coal seam floor behavior after mining with CPB method. Firstly, the numerical model by using Midas/GTS-Flac3d method is developed on the basis of 2353 working face, Daizhuang Coal Mine; then, the slip line field theory of plastic mechanics is applied to calculate the floor damage depth. Furthermore, field observation is carried out by using water injection method.

More

mining pressure in mixed workface using a gangue ...

2.1. Mining method of the mixed workface. The mixed workface is a fully mechanized gangue backfilling mining section (hereinafter referred to as the ‘gangue backfilling section’) combined with a traditional, fully mechanized coal mining technology section (hereinafter referred to as the ‘caving section’) in the same coal-mining workface.

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Tailingsfo Backfill of Tailings to Underground

2021-1-4  Tailings can be stored below ground in previous worked out voids. The tailings are generally mixed with a binder, usually cement, and then pumped underground to fill voids and help support an underground mine. For example a ‘room and pillar’ mining operation that uses backfill will be able to extract the insitu pillars containing ore.

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Underground Mining Methods and Equipment

2020-8-25  If backfilling (to fill mined-out spaces with rock, soil or tailings) is part of the underground operation for improving mining recovery, safety, and mitigating surface subsidence, a fill raise will be constructed for transporting backfill materials prepared at the

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Surface collapse control under thick unconsolidated layers ...

With these risks in mind, this study proposes a backfilling strip mining method via determination of the appropriate longwall face length and mining height to guard against bearing structure failure and thus avoid surface collapse. A field trial of the technique was

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The Differences in Underground Mines Dewatering with

2006-6-19  The method was adapted by coal mining to permit high-extraction mining beneath built-up areas on the ground surface by reducing subsidence effects. In the U.S., backfilling of abandoned mine workings through boreholes from the surface has been more recently applied as part of the Abandoned Mined Lands (AML) program of the

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Backfill - QueensMineDesignWiki

2019-6-28  Mine fill is an integral component of mines' design and method with many operations utilizing backfill as a means to aid the stabilization of mining-related voids and the disposing of mining wastes. Concrete is a common additive to backfill material to improve strength and

More

State-of-the-Art Techniques for Backfilling Abandoned

2009-6-9  mining methods, backfilling during the mining operation may be a future option for subsidence control. There are a number of differences between backfilling methods used in active mines to prevent surface subsid-ence and those used in abandoned mines. The greatest difference is the lack of access to abandoned mine voids.

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Method of mine backfilling and material therefor - Joy ...

The method of the present invention also provides a backfill which is able to support men and machinery shortly after backfilling has been completed and which is not subject to reliquidification subsequent to placement. Accordingly, one object of this invention is to provide a new and improved method of backfilling for underground mining ...

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Analysis and Application of Backfill Mining in Thin Coal ...

2019-11-7  mining have a low mining rate, directly leading to massive coal resources left in the gob, which is a huge waste of coal resources (Sun et al. 2017). Although harmonic mining would achieve the same production as traditional longwall mining method, it cannot control the destruction of the overburden strata. As is well-known, rupture failure

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Application Prospect of Backfill Technology for Pillar ...

The wastage of coal during pillar extraction in room and pillar mining method in Pakistan is the biggest issue nowadays. This is the first time to research on it and redesign the mining method with small modifications to reduce the wastage of coal in Pakistan. Backfilling technology is the only technique to reduce the wastage

More

Underground Mining Methods and Equipment

2020-8-25  If backfilling (to fill mined-out spaces with rock, soil or tailings) is part of the underground operation for improving mining recovery, safety, and mitigating surface subsidence, a fill raise will be constructed for transporting backfill materials prepared at the

More

© Copyright 2011, Australian Centre for Geomechanics

2016-11-10  returning land to a form that supports pre‐mining land use. 2 Key drivers of mine void backfilling 2.1 Operational imperatives for mine void backfilling While void backfilling may be costly or not economically feasible in many instances, in some circumstances

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The Differences in Underground Mines Dewatering with

2006-6-19  The method was adapted by coal mining to permit high-extraction mining beneath built-up areas on the ground surface by reducing subsidence effects. In the U.S., backfilling of abandoned mine workings through boreholes from the surface has been more recently applied as part of the Abandoned Mined Lands (AML) program of the

More

Modern Mining Technology(现代采矿技术)-Powered by ...

Modern Mining Technology(现代采矿技术)is a full-English major course, Mining Method and Mining Pressure and Strata Control courses are suggested to learn previously. This course is suitable for majors such as mining engineering, safety engineering and geology engineering etc.

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