coal mining equipment to detect underground seam

Use of ground penetrating radar in underground coal mining

The main goal of the work was to determine whether a radar-based system could be used to detect coal-rock interfaces in order to establish a suitable mining horizon within the

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Analysis and Application of Coal Seam Seismic Waves for ...

2020-9-25  Analysis and Application of Coal Seam Seismic Waves for detection of Abandoned Mines Daniel J. Yancey ... It is not uncommon for underground coal mining to be conducted in the proximity of aban- ... equipment, and production from inundation or explosive gas release. The mining disaster at Quecreek, PA in 2002, is a prime example. While ...

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Analysis and Application of Coal Seam Seismic Waves for ...

Often, surface or underground drilling is employed to detect the mine void and evaluate the hazards, sometimes with disastrous results. The use of guided waves within coal seams can be utilized to locate voids, faults, and abrupt seam thickness changes. The use of seam waves for void detection and mine planning has tremendous value and use.

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Research and Application of In-seam Seismic Survey ...

2019-10-10  Underground mining, used by most of China’s coal mines, accounts for nearly 90% of China’ s coal production. While, the output of open pit mining in other major coal producing countries accounts for about 70%. In China, the condition of coal seams in many coal mines are relatively poor, and the coal seam thickness is unstable and among ...

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ultra thin coal seam, fully mechanized mining technology ...

The paper introduced existing status of domestic mining technology of ultra thin coal seam and pointed out that existing fully mechanized mining equipments are not suitable for mining ultra thin coal seam. It introduced structure and performance of new types o

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Task-Specific Postures in Low-Seam Underground Coal

2012-8-30  options are restricted by the low-seam underground mining environment. 1. Introduction. In 2009, 532 underground coal mines produced a total of 330.8 million tons of coal (MSHA, 2009). Of these mines, 148 (28%) were. considered low seam with a seam height of less than 109.2 cm and produced 19.1 million tons of coal. For economic reasons, the seam

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Blasting in Underground Coal Mines - Mining Science

2020-10-10  and convey the broken coal out of underground workings. •Continuous mining equipment has escalated coal production and introduced more effective and efficient coal handling facilities. •Traditional drilling and blasting methods are no longer employed as the primary means of breaking coal in Australia, when mining has reached the coal seam.

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Method for prevention and control of spontaneous ...

2017-9-1  Mechanism of coal seam spontaneous combustion is as same as that of a general spontaneous combustion, which will require oxygen. The oxygen, provided by air leakage, is influenced by extraction and other human activities .Meanwhile, fire extinguishment for coal seam spontaneous combustion is quite difficult as it is not easy to remove such a huge amount of heat.

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Modern experience of low-coal seams underground

2018-11-1  Coal is the most abundant energy resource and will continue to be the dominant energy source for decades , , .To maintain a sustainable development of mining areas, the extraction of thin coal seam, which is usually less than 1.3 m in thickness, becomes increasingly important , .

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(PDF) COAL MINING METHODS - ResearchGate

Auger mining uses large-diameter drills mounted on m obile equipment to bore into a coal seam. Holes are horizontally drilled at regular intervals to depths of as much as 1,000 feet. As the cutting

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Analysis and Application of Coal Seam Seismic Waves for ...

2020-9-25  Analysis and Application of Coal Seam Seismic Waves for detection of Abandoned Mines Daniel J. Yancey ... It is not uncommon for underground coal mining to be conducted in the proximity of aban- ... equipment, and production from inundation or explosive gas release. The mining disaster at Quecreek, PA in 2002, is a prime example. While ...

Read More
Analysis and Application of Coal Seam Seismic Waves for ...

Often, surface or underground drilling is employed to detect the mine void and evaluate the hazards, sometimes with disastrous results. The use of guided waves within coal seams can be utilized to locate voids, faults, and abrupt seam thickness changes. The use of seam waves for void detection and mine planning has tremendous value and use.

Read More
Literature survey on the advance detection of dykes in ...

2021-9-10  to detect dykes ahead of underground coal mine workings. In this study a range of geophysical and exploration methods have been identified which are generally used in the mining industry. Each different method exploits a different physical property of the earth’s crust, e.g. seismic and acoustic methods

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Recent Patents on Thin Coal Seam Mining Equipment ...

2021-5-30  The mining efficiency of thin coal seam and very thin coal seam can be improved and the mining cost can be reduced. Results: Thin coal seam shear mining combines mining, conveying, and supporting processes together and has the advantages of a low fuselage, no extra support required for the working face, and feasibility in a small underground space.

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(PDF) Underground mining of thick coal seams

This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). Review shows the required engineering for extraction of thick seams needs to be ...

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ultra thin coal seam, fully mechanized mining technology ...

The paper introduced existing status of domestic mining technology of ultra thin coal seam and pointed out that existing fully mechanized mining equipments are not suitable for mining ultra thin coal seam. It introduced structure and performance of new types o

Read More
Task-Specific Postures in Low-Seam Underground Coal

2012-8-30  options are restricted by the low-seam underground mining environment. 1. Introduction. In 2009, 532 underground coal mines produced a total of 330.8 million tons of coal (MSHA, 2009). Of these mines, 148 (28%) were. considered low seam with a seam height of less than 109.2 cm and produced 19.1 million tons of coal. For economic reasons, the seam

Read More
Blasting in Underground Coal Mines - Mining Science

2020-10-10  and convey the broken coal out of underground workings. •Continuous mining equipment has escalated coal production and introduced more effective and efficient coal handling facilities. •Traditional drilling and blasting methods are no longer employed as the primary means of breaking coal in Australia, when mining has reached the coal seam.

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APPLICATION OF SIGNAL PROCESSING TECHNOLOGY

APPLICATION OF SIGNAL PROCESSING TECHNOLOGY FOR AUTOMATIC UNDERGROUND COAL MINING MACHINERY Jonathon C. Ralston, David W. Hainsworth, Ronald J. McPhee, David C. Reid and Chad O. Hargrave

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Geomorphology of coal seam fires - ScienceDirect

2012-2-1  In coal fire geomorphology, we differentiate two types of sinkholes. In type 1 sinkholes, the bedrock subsides above an underground burned coal seam (reduced to a thin ash layer). Type 2 sinkholes are those that collapse directly onto an exposed coal seam that is burning at deeper depths (see Figs. 7A, 8A, 9). Download : Download full-size image

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Analysis and Application of Coal Seam Seismic Waves for ...

2020-9-25  Analysis and Application of Coal Seam Seismic Waves for detection of Abandoned Mines Daniel J. Yancey ... It is not uncommon for underground coal mining to be conducted in the proximity of aban- ... equipment, and production from inundation or explosive gas release. The mining disaster at Quecreek, PA in 2002, is a prime example. While ...

Read More
Literature survey on the advance detection of dykes in ...

2021-9-10  to detect dykes ahead of underground coal mine workings. In this study a range of geophysical and exploration methods have been identified which are generally used in the mining industry. Each different method exploits a different physical property of the earth’s crust, e.g. seismic and acoustic methods

Read More
(PDF) Underground mining of thick coal seams

This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). Review shows the required engineering for extraction of thick seams needs to be ...

Read More
Top of coal detection technology towards ... - AMSJ

2020-8-19  Top of coal detection technology towards commercialisation. CR Digital and Mining3 are pleased to announce a partnership with the next phase of development in Top of Coal technology. This announcement comes on the back of promising new results delivered from the most recent Bowen Basin trial, where the technology was tested over 12 weeks and ...

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Recent Patents on Thin Coal Seam Mining Equipment ...

2021-5-30  The mining efficiency of thin coal seam and very thin coal seam can be improved and the mining cost can be reduced. Results: Thin coal seam shear mining combines mining, conveying, and supporting processes together and has the advantages of a low fuselage, no extra support required for the working face, and feasibility in a small underground space.

Read More
Task-Specific Postures in Low-Seam Underground Coal

2012-8-30  options are restricted by the low-seam underground mining environment. 1. Introduction. In 2009, 532 underground coal mines produced a total of 330.8 million tons of coal (MSHA, 2009). Of these mines, 148 (28%) were. considered low seam with a seam height of less than 109.2 cm and produced 19.1 million tons of coal. For economic reasons, the seam

Read More
Coal Shearer,Coal Mining Shearer,Low Coal Seam Shearer ...

Fluorspar Beneficiation Process Plant. The Introduction of Placer Gold Ore Dressing Technology and Equipment. Gold mining underground 600 meters. Application of Electrical Haulage In-web Shearer on Working Face of Ultra-thin Coal Seam with Large Inclination. HOT Resolved A World’s Problem About The Low Coal Seam Mining Technology.

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Coal mining - Global Energy Monitor

2021-10-9  As the longwall mining equipment moves forward, overlying rock that is no longer supported by coal is allowed to fall behind the operation in a controlled manner. The supports make possible high levels of production and safety. Sensors detect how much coal remains in the seam while robotic controls enhance efficiency.

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Prediction of coal seam details and mining safety using ...

2021-4-13  With the increasing mining depth of coal mines, geologic hazards have become the main source of accidents. For this reason, coal seam prediction requires more assessment parameters, such as the degree of anisotropy, V P / V S value, and elastic modulus. These parameters are difficult to determine using only the PP-wave.

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Geomorphology of coal seam fires - ScienceDirect

2012-2-1  In coal fire geomorphology, we differentiate two types of sinkholes. In type 1 sinkholes, the bedrock subsides above an underground burned coal seam (reduced to a thin ash layer). Type 2 sinkholes are those that collapse directly onto an exposed coal seam that is burning at deeper depths (see Figs. 7A, 8A, 9). Download : Download full-size image

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