Application Of The Longwall Top Coal Caving System In Austra


Top Coal Caving | Longwall | underground COAL

LONGWALL TOP COAL CAVING Considerable design work is required for the face ends to include the drives for the rear AFC, particularly at the main gate face end where the BSL would have to extend through the main gate supports to the rear AFC and be protected from being buried by the goaf


Application of Longwall Top Coal Caving to - ACARP

The aim of this project was to provide the Australian underground coal mining industry with an up to date, state of the art summary of the Longwall Top Coal Caving (LTCC) mining system and its potential for application in Australia


top coal caving longwall maximizes thick seam recovery

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Longwall Top Coal Caving | Introduction | underground COAL

Longwall Top Coal Caving The sliding doors in the canopies are sequentially opened, and the coal falls through onto the rear mounted AFC The maingate stage loader is extended beyond the face conveyor to enable the rear mounted AFC to discharge coal directly onto it and carry coal to the maingate conveyor system


Geotechnical Considerations for Longwall Top Coal Caving

opportunity for an early commencement of the installation of the longwall into the new panels conditions as the mine advances beyond a depth of 600 m has proven to give optimum caving recovery given the powered support geometry the top coal section between 75% …


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 Introduced in France, and further refined in China, top coal caving uses a modified long wall mining system


Geotechnical Considerations for Longwall Top Coal Caving

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


Evaluation of the application of the Longwall Top Coal

Evaluation of the application of the Longwall Top Coal Caving (LTCC) Method in Australia B K Hebblewhite & Y J Cai UNSW Mining Research Centre


Evaluation of Mine Scale Longwall Top Coal Caving

assigned a uniform height of 35m and the top coal was assigned with remaining height of the coal seam The bottom part was extracted using the normal longwall extraction method The top coal was extracted in such a way that it mimics the real top coal caving mechanism, ie top coals located


Evaluation Of The Application Of The Longwall Top Coal

Longwall Top Coal Caving (LTCC), as the most attractive method for thick coal seams, has been suffering from insufficient geomechanical understanding for the past few years Cavability without doubt is the most critical geomechanical issue associated with the top coal caving method


The Principle of Longwall Top Coal Caving (LTCC) - YouTube

Apr 30, 2015 · Following a conventional cut with a shearer to about 3 m (98 ft) the roof supports move forward and allow the caving of the top coal behind the roof supports a second conveyor mounted gob-side


Top Coal Caving Longwall Maximizes Thick Seam Recovery

Introduced and improved over the last 20 years, the Longwall Top Coal Caving (LTCC) method, used for extracting thick seams (greater than 45 m), was recently launched in Australia More than 90 such longwalls already operate in China


Longwall Top Coal Caving,Top Coal Caving,Top Coal Caving

The Top Coal Caving is a Modified Longwall Mining system Equipment Selection of Longwall Top Coal Caving Mining The space behind the rear legs of the powered supports is large enough to allow lateral and vertical movements other goaf shield for control of caving


Longwall Top Coal Caving (LTCC) Mining Technology

Above Pic ture, A typical mining planning of longwall top coal caving method Coal Seam Thickness 45-7 Meters; Phase 3rd 65-7 Meters Depth of Coal 400-700 Meters; currently, the mining depth is 530 Meters An additional AFC is attached to the rear of the chocks and runs directly below the canopy openings


A review of cavability evaluation in longwall top coal caving

Longwall Top Coal Caving has been considered as one of the most effective technologies for the extraction of underground thick coal seams A large number of studies on the applicability of Longwall Top Coal Caving into new mine sites have linked the success of its application to the geomechanical understanding of the cavability of the top coal


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 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 40o/o


Punch Multi-slice Longwall Mining System for Thick Coal

30 Punch Multi-Slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions A new multi-slice top coal caving mining method based on the concept of punch longwall and top coal caving methods is proposed The concept of the new multi-slice top coal caving mining method is illustrated in Fig 3


An Innovative Longwall Mining Technology in Tangshan Coal

longwall top coal caving (CLTCC) is the main mining method throughout the country [2] However, problems such as low recovery, fire, coal bumps and bursts, wavy surface subsidence, etc, constrain its development and practical application [1] The application of CLTCC in inclined coal seams is more


Cat | Customized Roof Support Systems | Caterpillar

Longwall Top Coal Caving The Longwall Top Coal Caving (LTCC) roof support allows mining to a total seam height of more than 10 m (33 ft) by using a longwall shearer to cut the bottom 28-30 m (92-98 ft) and then caving the top coal behind the roof supports onto a rear AFC


Stress analysis of longwall top coal caving - EDEM Simulation

Longwall top coal caving (LTCC) is a relatively new method of mining thick coal seams that is currently achieving high productivity and efficiency in application, particularly in China The technique is similar to traditional longwall mining in that a cutting head slices coal from the lower section of the coal seam onto a conveyor belt […]


Viewpoint Mining Magazine - Longwall Top-Coal Caving

Longwall Top-Coal Caving: A productive and efficient alternative 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


Longwall Top Coal Caving (LTCC) Mining Technology

The Top Coal Caving is a Modified Longwall Mining system Equipment Selection of Longwall Top Coal Caving Mining The space behind the rear legs of the powered supports is large enough to allow lateral and vertical movements other goaf shield for control of caving


Evaluation Of The Application Of The Longwall Top Coal

Longwall Top Coal Caving (LTCC), as the most attractive method for thick coal seams, has been suffering from insufficient geomechanical understanding for the past few years Cavability without doubt is the most critical geomechanical issue associated with the top coal caving method


Top Coal Caving Mining Method - nnguniclubcoza

Application of Longwall Top Coal Caving to - ACARP The aim of this project was to provide the Australian underground coal mining industry with an up to date, state of the art summary of the Longwall Top Coal Caving (LTCC) mining system and its potential for application in Australia


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 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 40o/o


Punch Multi-slice Longwall Mining System for Thick Coal

30 Punch Multi-Slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions A new multi-slice top coal caving mining method based on the concept of punch longwall and top coal caving methods is proposed The concept of the new multi-slice top coal caving mining method is illustrated in Fig 3


Application of the Vibration to the Top Coal Caving

The article discussed the advantages and disadvantages of the traditional long wall top coal caving (LTCC) first, then proposed a new technique of top coal caving with vibration The theoretical basis of the technique was elaboratedThe top coal vibration system and its control system have been designed as such when the system works, the emulsion pump station provides power for whole system


Longwall innovations to debut - Australian Mining

Jul 09, 2007 · Longwall innovations to debut Australia’s first Longwall Top Coal Caving (LTCC) system at the AUSTAR mine in the Hunter Valley of-the-art automated control for longwall …


Stress analysis of longwall top coal caving - EDEM Simulation

Longwall top coal caving (LTCC) is a relatively new method of mining thick coal seams that is currently achieving high productivity and efficiency in application, particularly in China The technique is similar to traditional longwall mining in that a cutting head slices coal from the lower section of the coal seam onto a conveyor belt installed in front of the hydraulic support near the cutting face


An Innovative Longwall Mining Technology in Tangshan Coal

Thick coal seams are widely spread over most provinces and regions in China [1] Conventional longwall top coal caving (CLTCC) is the main mining method throughout the country [2] However, problems such as low recovery, fire, coal bumps and bursts, wavy surface subsidence, etc, constrain its development and practical application [1]


mining method longwall - rtl3be

Application of Longwall Top Coal Caving to Australian The aim of this project was to provide the Australian underground coal mining industry with an up to date, state of the art summary of the Longwall Top Coal Caving (LTCC) mining system and its potential for application in Australia


A Brief Comparison of Longwall Methods Used at Mining of

Figure 3 Multi-Slice Longwall (Xu, 2001) In comparison with top coal caving method, the slicing method is of lower output, higher production cost and less safety (Xu, 2001) From the economic point of view, investment costs for the panel in MSL are twice higher than at the LTCC method (Köse et al, 1989) 23 The Longwall Top Coal Caving Method


Mining safety of longwall top-coal caving in China

Abstract 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%


Cat | Caterpillar to Supply Two Complete Longwall Top Coal

In July 2014 Caterpillar will deliver the first of two complete Cat ® longwall mining systems to the Soma Eynez East mine of Demir Export AS – Fernas Insaat AS Joint Venture Both longwall systems are designed for longwall top coal caving (LTCC) in a coal seam with an …