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longwall top coal caving technology

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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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 successfully beyond around 5m mining height.

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(PDF) Longwall top coal caving (LTCC) mining technologies ...

2018-5-1  Longwall top coal caving mining is one of the main methods of mining thick coal seams in China. Terefore, carrying out the classification evaluation of top coal caving is of great significance to ...

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Longwall top coal caving (LTCC) mining technologies with ...

Longwall top coal caving (LTCC) mining technologies with roof softening by hydraulic fracturing method. V Klishin 1, S Nikitenko 1 and G Opruk 1. Published 1 May 2018 •

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A review of cavability evaluation in longwall top coal caving

2017-11-1  Longwall Top Coal Caving was initially developed in the former Soviet Union and France in the 1950s and 1960s. It was then applied in the former Yugoslavia, Hungary, Romania, the former Czechoslovakia and Turkey , , .The ‘Soutirage’ method which was developed in France in the 1960s is considered as the original form of LTCC .The system includes a conventional longwall face operating

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Three-dimensional experimental study of loose top-coal ...

2015-6-1  1. Introduction. Longwall top-coal caving (LTCC) mining technology is a productive and economical method to extract thick coal seams, and thus is widely used in many coal mines in China (Wang, 2009, Wang et al., 2014).Although some hypotheses on top-coal drawing process were proposed (e.g. Wang and Fu, 2002, Wang et al., 2004, Wang et al., 2010, Wang et al., 2014, Unver and Yasitli,

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Methane control for mechanised longwall top-coal caving ...

2013-9-5  AbstractIn China, mechanised longwall top-coal caving technology (LTCT) has been widely used under suitable thick coal seam conditions due to its low cost, high production and productivity since it was introduced in 1982. It has even been applied in some high gas-content mines (e.g. No. 5 Mine, Yangquan coalfield), where methane is the most serious hazard affecting production in the mine.

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Technology - Yancoal - Coal Mining

Technology. We are a coal mining company with an eye on the future, combining cutting edge technologies with a diverse mix of coal products from open cut and underground mine operations. Yancoal introduced the Longwall Top Coal Caving (LTCC) mining technology to Australia at

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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 operate successfully beyond around 5m mining height.

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Viewpoint Mining Magazine - Longwall Top-Coal Caving

Longwall Top-Coal Caving isn’t just an alternative mining technique; it can be the difference between a productive, profitable mine and an unsustainable operation. The technology reduces waste and operating costs, making for a more efficient operation. “By achieving the highest productivity possible, operations can stay profitable even in ...

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Longwall top coal caving (LTCC) mining technologies with ...

Longwall top coal caving (LTCC) mining technologies with roof softening by hydraulic fracturing method. V Klishin 1, S Nikitenko 1 and G Opruk 1. Published 1 May 2018 •

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Mining safety of longwall top-coal caving in China ...

Longwall top-coal caving technology has developed rapidly in China, in recent years. The application of longwall top-coal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 50%. Using standard longwall equipment, annual production can reach 3 million metric tons (Mt), and a ...

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Geotechnical Considerations for Longwall Top Coal

2020-10-13  LONGWALL TOP COAL CAVING DESCRIPTION . 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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Methane control for mechanised longwall top-coal caving ...

2013-9-5  AbstractIn China, mechanised longwall top-coal caving technology (LTCT) has been widely used under suitable thick coal seam conditions due to its low cost, high production and productivity since it was introduced in 1982. It has even been applied in some high gas-content mines (e.g. No. 5 Mine, Yangquan coalfield), where methane is the most serious hazard affecting production in the mine.

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Techno-Economic Feasibility of the Longwall Top Coal ...

An extraction method for deep-seated thick seam deposits by underground mining with high resource recovery has remained a great challenge for Indian mining engineers, whereas the longwall top coal caving (LTCC) method has evolved as an effective method for various geo mining conditions in China and other counties. The percentage of top coal recovery (TCR) plays a predominant role in ...

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Viewpoint Mining Magazine - Longwall

Longwall Top-Coal Caving: A productive and efficient alternative. Longwall mining is one of the most productive ways to produce coal, but longwall mines have trouble efficiently mining seams higher than 6 m (19.6 ft). Longwall Top-Coal Caving can more than double the resource recovery rate of normal longwall equipment working in high seams.

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Longwall Mining Syd S. Peng Taylor Francis Group

2019-11-18  Since the last plow longwall mine was closed in 2018, the chapter on plow longwalling has been dropped and in its place Automation of Longwall Components and System is added. Also, a new chapter Longwall Top Coal Caving Mining (LTCC) is added due to

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Drawing mechanism of fractured top coal in longwall top ...

The top end of the caved zone in Yangwangou coal mine employing the top coal caving longwall mining was at the depth of 171 m and fractured zone was at the depth of 106–110 m. The results ...

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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 operate successfully beyond around 5m mining height.

More

Top Coal Caving Longwall underground COAL

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 site. Despite the fact that there are numerous coal seams in Australia which are thick enough for LTCC to be used to increase recoveries, potentially at a reduced cost/tonne, there has been ...

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Longwall top coal caving (LTCC) mining technologies with ...

Longwall top coal caving (LTCC) mining technologies with roof softening by hydraulic fracturing method. V Klishin 1, S Nikitenko 1 and G Opruk 1. Published 1 May 2018 •

More

Geotechnical Considerations for Longwall Top Coal

2020-10-13  LONGWALL TOP COAL CAVING DESCRIPTION . 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

More

OptimizationofCavingTechnologyinanExtrathickSeamwith ...

2021-8-4  e optimization of top coal caving technology is an efficient method to improve the recovery ratio in longwall top coal caving (LTCC). In extrathick coal seams, the conventional single-opening sequential caving technology (SOSCT) shows the following problems: low recovery ratio, high rock mixed ratio, and poor drawing balance.

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Techno-Economic Feasibility of the Longwall Top Coal ...

An extraction method for deep-seated thick seam deposits by underground mining with high resource recovery has remained a great challenge for Indian mining engineers, whereas the longwall top coal caving (LTCC) method has evolved as an effective method for various geo mining conditions in China and other counties. The percentage of top coal recovery (TCR) plays a predominant role in ...

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Longwall Top Coal Caving Mechanisms in the Fractured

The integrated FDM–DFN model enabled the influence of the preexisting fracture, stress redistribution, stress rotation, caving material compaction, and periodic rupture of roof strata to be superimposed on the failure process of top coal. It was revealed the LTCC influenced both magnitude and orientation of the principal stress within top coal.

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Application of retreating and caving longwall (top coal ...

2013-9-5  The present paper discusses the application of the longwall top coal caving method and its advantages and disadvantages compared with conventional longwall mining at the mine. In general adequate retreat rates were achieved once sufficient experience of the top coal caving method allowed the method to be refined.

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Longwall Mining Syd S. Peng Taylor Francis Group

2019-11-18  Since the last plow longwall mine was closed in 2018, the chapter on plow longwalling has been dropped and in its place Automation of Longwall Components and System is added. Also, a new chapter Longwall Top Coal Caving Mining (LTCC) is added due to

More

Drawing mechanism of fractured top coal in longwall top ...

The top end of the caved zone in Yangwangou coal mine employing the top coal caving longwall mining was at the depth of 171 m and fractured zone was at the depth of 106–110 m. The results ...

More
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