Longwall Top Coal Caving Mining

Longwall Top Coal Caving Mining

Longwall Top Coal Caving Mining

  • Viewpoint Mining Magazine - Longwall Top-Coal Caving

    How It WorksAutonomous OperationLTCC Around The WorldA Productive AlternativeIn traditional longwall mining, the shearer travels along the face of the coal seam, cutting as it goes and dropping coal onto an armored face conveyor (AFC) that carries it to a belt or crusher. When a cut is complete, the whole system moves forward one step at a time until the seam is finished.The LTCC method adds another conveyor behind the roof supports, which are equipped with an extended canopy and a sliding door that protects the second conveyor. When the shearer advances, the coal lef...
  • 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 ...

  • Ultra-thick Seam Longwall Mining in China Coal Age

    The disadvantages of top coal caving are that the recovery rate of top coal at both ends of the face is very low and the coal left in the gob is the source for spontaneous combustion. Therefore, the ultra-thick whole seam one slice longwall mining was developed to increase the recovery rate and safety of ultra-thick coal seams in 2009.

  • Longwall Top Coal Caving (LTCC) technology - Yancoal

    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 excavation of thick coal seams of 5 to 12 metres at one pass of the longwall machine, generating high productivity and economic returns for ...

  • 3D numerical modeling of longwall mining with top-coal caving

    Coal has been produced by means of longwall retreat with the top-coal-caving production method where a 2.8 m high longwall face was operated at the floor of the coal seam . Top-slice coal having a thickness of 5.2 m was caved and produced through windows located at the top of the shields.

  • Cited by: 173
  • Caving mechanisms of loose top-coal in longwall top-coal ...

    The top-coal caving longwall mining is one of the major mining methods for extracting thick coal seams in China. The top-coal caving mining was estimated to have produced about 0.6 billion metric tons every year, accounts for 18% of underground coal mining in China .The major features of the top-coal caving mining are that a conventional longwall mining with cutting height 2–3 m is performed ...

  • Cited by: 32
  • LONGWALL TOP COAL CAVING MINING Zhengyang Song 1 ...

    A 3D particle-based numerical approach to simulate the longwall top coal caving (LTCC) process was proposed, which for the first time the effect of continuous support advance and the face-end ...

  • Longwall Top Coal Caving Introduction underground COAL

    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

  • Principles of Longwall Mining - YouTube

    Apr 12, 2016  This video provides a basic description of the long-wall mining method for extracting coal underground. It includes an explanation of the different products/key components of a long-wall mining ...

  • 作者: Wyoming Machinery Company
  • Longwall mining - Wikipedia

    Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–1.0 m (2 ft 0 in–3 ft 3 in) thick). The longwall panel (the block of coal that is being mined) is typically 3–4 km (1.9–2.5 mi) long and 250–400 m (820–1,310 ft) wide.

  • longwall top coal caving Mining -- HOT mining 浩特矿业

    Longwall Top Coal Caving (LTCC) is a special designed longwall mining methodfor very thick seams (thickness is more than 4.5m) where good quality coal is being left because "conventiona l" longwall equipment has not yet been designed to operate successfully beyond around 5m mining height. It enables an increased recovery for only an incremental ...

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

    @article{osti_20020940, title = {Mining safety of longwall top-coal caving in China}, author = {Wu, J and Qin, Y and Zhai, M}, abstractNote = {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 ...

    The longwall top coal caving (LTCC) mining method to be employed at the Eynez East underground coal mine is a special type of longwall mining applicable to seams thicker than 6 meters (20 feet). Conventional longwall equipment has not yet been designed to operate successfully in seams thicker than approximately 6 meters (20 feet) mining height.

  • (PDF) Drawing mechanism of fractured top coal in longwall ...

    The longwall top coal caving (LTCC) is an ef cient mining method to speci cally extract thick or ultra-thick coal seams due to its good adaptability with respect to the large variations of coal ...

  • A General Review on Longwall Mining-Induced Fractures in ...

    Therefore, mining-induced fractures are significant for the safety evaluation of underground structures and finding feasible solutions. On the other hand, the fractures are also beneficial for methane collection and coal fragmentation, which are essential for the successful operation of longwall top coal caving mining.

  • Longwall Top Coal Caving - MiningMonthly

    INTERNATIONAL Longwall News brings you two detailed reports on the status of longwall top coal caving in Australia. Future Of Mining > Innovation 16 November 2005

  • Mining Safety of Longwall Top-coal Caving in China

    2Zhangji Coal Mine, Xuzhou Mining Bureau, Xuzhou 221147, Jiangsu Province, P.R of 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 40o/o.

  • Amazon: Longwall Mining, 3rd Edition (9780367201920 ...

    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

  • Longwall Top Coal Caving,Top Coal Caving,Top Coal Caving ...

    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.

  • Viewpoint Mining Magazine - Miners gather to see the ...

    Longwall Top Coal Caving (LTCC) was introduced in 2012. Another Caterpillar customer, CNX Coal Resources, gave a presentation called “Monster Wall,” discussing the concepts, factors, restrictions and other considerations the mine faced when expanding the longwall face length from 457 to 610 meters (1,500 to 2,000 feet).

  • LW – 2017 – Session III Longwall USA

    May 14, 2019  Longwall Top Coal Caving at the Broadmeadow Mine by Developer May 14, 2019 LW – 2017 – Session III 0 By Matt Jones, longwall superintendent Broadmeadow mine, BHP Billiton Alliance (BMA); Kevin Meyer, longwall maintenance superintendent, Broadmeadow mine; and Brett Moule, longwall applications, Cat Global Mining The...

  • Longwall Top Coal Caving at the Broadmeadow Mine ...

    May 14, 2019  The adjacent open-cut mine has been mining the full seam section for more than 30 years, investigations and evaluations were made into the Top Coal Caving method and its suitability for the operation. Longwall Top Coal Caving (LTCC) was introduced in 2012.

  • Longwall Top Coal Caving,Top Coal Caving,Top Coal Caving ...

    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.

  • Viewpoint Mining Magazine - Miners gather to see the ...

    Longwall Top Coal Caving (LTCC) was introduced in 2012. Another Caterpillar customer, CNX Coal Resources, gave a presentation called “Monster Wall,” discussing the concepts, factors, restrictions and other considerations the mine faced when expanding the longwall face length from 457 to 610 meters (1,500 to 2,000 feet).

  • LW – 2017 – Session III Longwall USA

    May 14, 2019  Longwall Top Coal Caving at the Broadmeadow Mine by Developer May 14, 2019 LW – 2017 – Session III 0 By Matt Jones, longwall superintendent Broadmeadow mine, BHP Billiton Alliance (BMA); Kevin Meyer, longwall maintenance superintendent, Broadmeadow mine; and Brett Moule, longwall applications, Cat Global Mining The...

  • Longwall Top Coal Caving at the Broadmeadow Mine ...

    May 14, 2019  The adjacent open-cut mine has been mining the full seam section for more than 30 years, investigations and evaluations were made into the Top Coal Caving method and its suitability for the operation. Longwall Top Coal Caving (LTCC) was introduced in 2012.

  • Caterpillar to Supply Two Complete Longwall Top Coal ...

    The longwall top coal caving (LTCC) mining method to be employed at the Eynez East underground coal mine is a special type of longwall mining applicable to seams thicker than 6 meters (20 feet). Conventional longwall equipment has not yet been designed to operate successfully in seams thicker than approximately 6 meters (20 feet) mining height.

  • evaluation of longwall face stability in thick coal seams ...

    Jan 31, 2019  Big coal blocks fell from the longwall face and led to the halt of mining operations and the interruption of production and productivity (figure 1a). In the meantime, face falls increased the unsupported area ahead of the shield by exposing the fresh immediate roof, with further increased risks of roof falls (figure 1b ).

  • 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.

  • Effect of Strata Conditions on Shield Pressure and Surface ...

    Sep 24, 2018  This paper presents a comprehensive analysis of roof strata conditions, shield pressure, and ground surface subsidence above Panel 42105 of the Buertai Coal Mine in Inner Mongolia, China. A 3D geological model and a 2D numerical simulation model are established to examine the roof strata structures with varying strata conditions. Numerical simulation results demonstrate that the hard rock 1 ...

  • A Coal Burst Mitigation Strategy for Tailgate during Deep ...

    A coal burst mitigation strategy for tailgate in mining of deep inclined longwall panels with top coal caving at Huafeng Coal Mine is presented in this paper. Field data showed that coal bursts, rib sloughing or slabbing, large convergence, and so forth frequently occurred within the tailgate entries during development and panel retreating employing standard longwall top coal caving (LTCC ...

  • Longwall Top Coal Caving Application Assessment in Australia

    The method employs both coal cutting of the lower portion of the coal seam accompanied by caving and reclamation of the ‘top’ coal. Coal is first cut from the longwall face using a conventional shearer and AFC arrangement working under hydraulic face supports that incorporate a rear coal conveyor and cantilever / flipper arrangement.

  • Longwall Mining, 3rd Edition - 1st Edition - Syd S. Peng ...

    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

  • Longwall mining (eBook, 2020) [WorldCat.org]

    Longwall Mining, 3rd edition will be of interest to professionals and academics in the field of mining engineering specifically, serving both as a reference work and an (under)graduate textbook, but will also interest civil, geomechanical and geological engineers and rock mechanics professionals, as well as coal operators, mining consultants ...

  • Longwall Mining Method and Design

    Longwall mines produce more than 30 pct of all underground coal, up from 5 pct just 15 years ago. The continued growth of longwall mining without appropriate multiple-seam planning may increase the cost and risk of mining. Optimization of the mine design factors is arguably the primary means for controlling interactions between operations. The ...

  • Longwall method coal mining Britannica

    In coal mining: Longwall mining. In the longwall mining method, mine development is carried out in such a manner that large blocks of coal, usually 100 to 300 metres wide and 1,000 to 3,000 metres long, are available for complete extraction (see photograph). A block of coal is Read More