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Key technologies and equipment for a fully mechanized

2017-8-26  Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams Jinhua Wang1 • Bin Yu2 • Hongpu Kang1 • Guofa Wang1 • Debing Mao1 • Yuntao Liang3 • Pengfei Jiang1 Received: 20 February 2015/Revised: 15 March 2015/Accepted: 18 March 2015/Published online: 21 July 2015

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Top Coal Caving Longwall underground COAL

equipment for a Longwall Top Coal Caving face. Photo courtesy of Joy Manufacturing Company Pty Ltd. A brief description of longwall top coal caving (LTCC) is included at the end of the Longwall section of the Fundamentals of Coal Mining module of this web

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Longwall Top Coal Caving Introduction underground

Longwall Top Coal Caving. Longwall top coal caving (LTCC) is a special type of longwall mining applicable to very thick seams (greater than 4.5m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate successfully beyond around 5m

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Longwall Top Coal Caving (LTCC) technology Yancoal

Longwall Top Coal Caving (LTCC) technology. Yancoal introduced the Longwall Top Coal Caving (LTCC) mining technology to Australia at its Austar mine in 2006. Developed in China, top coal caving uses a modified long wall mining system. LTCC allows the

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Geotechnical Considerations for Longwall Top Coal

2020-10-13  Longwall Top Coal Caving (LTCC) is an enhanced form of the conventional longwall recovery system, whereby a rear Armoured Face Conveyor (AFC) (refer to Figure 3) is utilised to extract coal from behind the powered supports that would otherwise be left unrecovered in thick seam environments. The major

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Application of Longwall Top Coal Caving in Challenging

2020-1-8  Abstract-Longwall top coal caving (LTCC) techniques has been employed in favourable geological conditions widely in China since the mid-80s and in Australia recently. With the improvement of highly-powered face equipment and the method itself, in the past 15 years, LTCC was introduced to more challenging geological

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我国煤矿综放开采40年:理论与技术装备研究进展 CHINACAJ

SONG Xuanmin,ZHU Defu,WANG Zhonglun,et al.Advances on longwall fully-mechanized top-coal caving mining technology in China during past 40 years:theory, equipment and approach[J].Coal Science and Technology,2021,49(3):1-29.doi:10.13199

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Recognition of rock–coal interface in top coal caving

This paper provides a novel rock-coal interface recognition method based on stacked sparse autoencoders (SSAE). Given their different size and hardness, coal and rock

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National Awards-煤炭资源与安全开采国家重点实验室

2017-10-10  “The key technology and equipment of extra thick coal seam full-mechanized top coal caving mining technology with great mining height” Wang, Jiachen(6) 5 The 2nd prize of National Advancement Award of Science and Technology in 2014

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Longwall Top Coal Caving,Top Coal Caving,Top Coal

Longwall Top Coal Caving (LTCC) is a special designed longwall mining method for very thick seams (thickness is more than 4.5m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to

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[PDF] Key technologies and equipment for a fully

Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of the total minable coal reserve. A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for coal seams less than 14 m thick

get price

Longwall Top Coal Caving Introduction underground

Longwall Top Coal Caving. Longwall top coal caving (LTCC) is a special type of longwall mining applicable to very thick seams (greater than 4.5m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate successfully beyond around 5m mining height.

get price

Geotechnical Considerations for Longwall Top Coal

2020-10-13  Longwall Top Coal Caving (LTCC) is an enhanced form of the conventional longwall recovery system, whereby a rear Armoured Face Conveyor (AFC) (refer to Figure 3) is utilised to extract coal from behind the powered supports that would otherwise be left unrecovered in thick seam environments. The major

get price

Application of longwall top coal caving to Australian

2004-2-15  In terms of equipment innovation, the more recent Chinese developments have relocated the top coal draw points to the rear of the longwall supports. The Chinese equipment has a pivoting supplementary goaf or tail canopy behind the support. Beneath this is

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Caving mechanisms of loose top-coal in longwall top-coal

Today, the top-coal caving longwall mining is the major mining method for thick seam coal mining in China. In the Datong coal district, the annual production is 1.5 million metric tons per panel. The top-coal caving longwall mining has attained outstanding achievements in coal mines with favorable conditions.

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Application of Longwall Top Coal Caving in Challenging

2020-1-8  Abstract-Longwall top coal caving (LTCC) techniques has been employed in favourable geological conditions widely in China since the mid-80s and in Australia recently. With the improvement of highly-powered face equipment and the method itself, in the past 15 years, LTCC was introduced to more challenging geological

get price

Viewpoint Mining Magazine Longwall Top-Coal Caving

The Longwall Top-Coal Caving (LTCC) method makes use of a second conveyor and the natural force of gravity to recover coal above the shearer’s recommended height once the face has advanced. According to Dr. Sebastian Mundry, a

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Coal Engineering

2021-9-24  Taking the top beam and base of the main structural parts of the anti-four-link caving coal transition support as the research object, the three-dimensional model of the top beam and base was established using SolidWorks, and the fatigue life analysis of the

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Recognition of rock–coal interface in top coal caving

This paper provides a novel rock-coal interface recognition method based on stacked sparse autoencoders (SSAE). Given their different size and hardness, coal and rock generate different tail beam vibrations. Therefore, the rock-coal

get price

Geotechnical Considerations for Longwall Top Coal

2020-10-13  Longwall Top Coal Caving (LTCC) is an enhanced form of the conventional longwall recovery system, whereby a rear Armoured Face Conveyor (AFC) (refer to Figure 3) is utilised to extract coal from behind the powered supports that would otherwise be left unrecovered in thick seam environments. The major

get price

Longwall Top Coal Caving,Top Coal Caving,Top Coal

Longwall Top Coal Caving (LTCC) is a special designed longwall mining method for very thick seams (thickness is more than 4.5m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate

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Top Coal Caving PresentationV5 ConsultMine

2015-12-21  Top coal caving Allison Golsby ˆ˙ ˝ ˛ Tuesday 23rd October 2012: 11.45am ˛ ˚ ˜ MAusIMM(CP), RPEQ, MEngSc(Min Man), MMinEng(Geomech), G Chief Executive Officer GPO Box 358 Brisbane Qld 4001 ˘ ˇ DipMVent [email protected] M +61 409 008 942

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Application of Longwall Top Coal Caving in Challenging

2020-1-8  Abstract-Longwall top coal caving (LTCC) techniques has been employed in favourable geological conditions widely in China since the mid-80s and in Australia recently. With the improvement of highly-powered face equipment and the method itself, in the past 15 years, LTCC was introduced to more challenging geological

get price

Viewpoint Mining Magazine Longwall Top-Coal Caving

The Longwall Top-Coal Caving (LTCC) method makes use of a second conveyor and the natural force of gravity to recover coal above the shearer’s recommended height once the face has advanced. According to Dr. Sebastian Mundry, a Caterpillar Inc. longwall automation manager, LTCC eliminates all the problems commonly associated with high-seam

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Recognition of rock–coal interface in top coal caving

This paper provides a novel rock-coal interface recognition method based on stacked sparse autoencoders (SSAE). Given their different size and hardness, coal and rock generate different tail beam vibrations. Therefore, the rock-coal interface in top coal caving can be identified using an acceleration sensor to measure such vibrations. The end of the hydraulic support beam is

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Application of longwall top coal caving to Australian

2004-2-15  In terms of equipment innovation, the more recent Chinese developments have relocated the top coal draw points to the rear of the longwall supports. The Chinese equipment has a pivoting supplementary goaf or tail canopy behind the support. Beneath this is

get price

[PDF] Key technologies and equipment for a fully

Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of the total minable coal reserve. A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for coal seams less than 14 m thick

get price

Longwall Top Coal Caving (LTCC) Mining Technology

Longwall Top Coal Caving (LTCC) is a special designed longwall mining method for very thick seams (thickness is more than 4.5m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate

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Coal Zoom Longwall Top-Coal Caving: A Productive and

2018-12-4  Longwall Top-Coal Caving: A Productive and Efficient Alternative . December 4, 2018 In the right conditions, longwall mining is one of the safest, most productive and most efficient ways to produce coal. This is owed in part to the high degree of automation employed by modern longwall operations, which keeps shearers and roof supports advancing smoothly and people

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