Longwall top coal caving equipment

MJ Series Jaw Crusher

MJ Series Jaw Crusher

MJ series jaw crusher is mainly used as a coarse crushing crusher. Its purpose is to crush rocks into smaller particle sizes for subsequent processing…

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MC Series Single-Cylinder Hydraulic Cone Crusher

MC Series Single-Cylinder Hydraulic Cone Crusher

MC series single cylinder hydraulic cone crusher is used in secondary and fine crushing operations. It is widely used in metallurgy, construction, highway,…

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ML Series Vertical Shaft Impact Crusher

ML Series Vertical Shaft Impact Crusher

Vertical shaft impact crusher is often used in the final crushing circuit. Due to the ability to produce fine-grained final products, ML series vertical…

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MD Series Multi-Cylinder Hydraulic Cone Crusher

MD Series Multi-Cylinder Hydraulic Cone Crusher

MD series multi-cylinder hydraulic cone crusher is used in the second and third stages of mineral processing and stone crushing, as well as the superfine…

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MF Series Fixed Shaft Circular Vibrating Screen

MF Series Fixed Shaft Circular Vibrating Screen

In order to eliminate the phenomenon of unbalanced vibration, unstable amplitude, on/off bounce, poor screening effect, and cracking of the screen box…

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MGD Series Vibrating Feeder

MGD Series Vibrating Feeder

MGD series vibrating feeder is designed for ultra-heavy working conditions and is suitable for feeding materials to primary jaw crushers, primary impact…

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MGB series hopper discharge feeder

MGB series hopper discharge feeder

MGB series hopper discharge feeder is mainly used for the uniform, quantitative and automatic control of under-silo feeding of bulk materials.…

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MZA/K Series Circular Vibrating Screen

MZA/K Series Circular Vibrating Screen

MZA/K series circular vibrating screen produced by Meilan has an axis-eccentric circular vibrating screen, which can be used for dry and wet classification…

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  • OBORTS Company, Opposite the residence of old General Mambou, Near Dragage, Bastos, Yaoundé, Cameroon
    Email: [email protected]

  • 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 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.

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

    2018-5-1 · Longwall top coal caving (LTCC) mining technologies with roof softening by hydraulic fracturing method May 2018 IOP Conference Series Materials Science and …

  • Ultra-thick Seam Longwall Mining in China Coal Age

    2013-10-24 · 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.

  • to supply two complete longwall top coal

    2014-7-2 · 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 …

  • Mining Safety of Longwall Top-coal Caving in China

    2020-11-4 · 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. Using standard longwall equipment, annual production can reach 3 million metric tons …

  • How does Longwall Top Coal Caving work? LTCC Mining

    2018-7-19 · 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

  • Top Coal Caving PresentationV5 - consultmine.au

    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

  • Mining safety of longwall top-coal caving in China

    1999-7-1 · Using standard longwall equipment, annual production can reach 3 million metric tons (Mt), and a maximum of 4.1 Mt has been obtained; many top-coal caving longwall working faces can obtain 200 tons per man-shift. Longwall top-coal caving is distinctly different from slice mining in thicken seam.

  • Longwall Mining - SlideShare

    2010-4-30 · Longwall Top Coal Caving (LTCC) Advantages of LTCC • Increased resource recovery in thick seams (> 75%) • Lower face working height (better face control) • Improved spontaneous combustion control • More efficient capital utilisation/ financial performance • Reduced operating costs • Improved production consistency • Less gate road

  • 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 …

  • to Supply Two Complete Longwall Top Coal

    2021-5-8 · 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.

  • 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 height.

  • An Innovative Longwall Mining Technology in Tangshan Coal

    Conventional longwall top coal caving (CLTCC) is the main mining method throughout the country . However, problems such as low recovery, fire, coal bumps and bursts, wavy surface subsidence, etc., constrain its development and practical application .

  • longwall top coal caving technology ppt

    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 …

  • Barloworld Equipment Specifications

    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 2.8-3.0 m (9.2-9.8 ft) and then caving the top coal behind the roof supports onto a rear AFC.

  • 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 …

  • Mining Safety of Longwall Top-coal Caving in China

    2020-11-4 · 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. Using standard longwall equipment, annual production can reach 3 million metric tons (Mt), and a maximum of 4.1 Mt has

  • Geotechnical Considerations for Longwall Top Coal …

    2020-7-2 · 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

  • 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 site. Despite the fact that there are numerous coal seams in Australia which are thick

  • Chinese Longwall Manufacturers. Coal, Colliery and

    2008-9-10 · The longwall was a China National Coal Mining Equipment (CME) top caving face, 240 metres wide and with a 2km panel length. The operation is a 365 days, 24/7 operation. The mine, which features two top coal caving faces and which has been operating since January 2005, has planned utilisation to keep the output conveyor belt full.

  • Application of Longwall Top Coal Caving to Australian

    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 a retractable second AFC. With the rear AFC extended and the rear canopy lowered/retracted

  • Chinese Longwall Manufacturers. Coal, Colliery and

    2008-9-10 · The longwall was a China National Coal Mining Equipment (CME) top caving face, 240 metres wide and with a 2km panel length. The operation is a 365 days, 24/7 operation. The mine, which features two top coal caving faces and which has been operating since January 2005, has planned utilisation to keep the output conveyor belt full.

  • Longwall Top Coal Caving at the Broadmeadow Mine

    2019-5-14 · The Broadmeadow mine was started using a longwall to extract coal at 4.7 m (15 ft) leaving the top section of the seam to fall into the gob. 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.

  • EPMSA Pty Ltd

    EPMSA is a professional services business specialising in coal mining projects. We provide real world relevant knowledge via our directors, Adrian Watson and Ian Glazebrook. We recognise that each organisation has a unique make up and we work with our clients …

  • 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

  • A Brief Comparison of Longwall Methods Used at Mining …

    2009-9-17 · 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). 2.3. The Longwall Top Coal Caving Method

  • The Key Stratum Structure Morphology of Longwall

    2020-8-28 · Longwall mechanized top coal caving mining (LMTCCM) in extra-thick coal seams has its own characteristics. The law of mining pressure and overlying strata failure height in extra-thick coal seams are much larger than those of medium-thick and thick coal seams. The key stratum structure morphology also has an important influence on the law of overlying strata movement and stability of

  • Key technologies and equipment for a fully mechanized …

    2017-8-26 · China, the top-coal caving mining method means the fully mechanized longwall top-coal caving mining method. A longwall panel is laid out at the bottom of the thick coal seam and extracted using a fully mechanized longwall mining method. At the same time, the remaining coal above the longwall face are fractured by ground stress and strain

  • (PDF) Longwall top coal caving design for thick coal seam

    Longwall top coal caving design for thick coal seam in very poor strength surrounding … 123 Gamble JC (1971) Durability-plasticity classification of shales and

  • PAPER OPEN ACCESS Functional schemes of automated …

    2020-3-14 · equipment in longwall top coal caving method (LTCC) with coal discharge to face conveyor. The application of the proposed schemes lessens the influence of the human factor, prevents coal dilution, eliminates conveyor overloading, decreases workload of shearer operator in face area and reduces the probability of making errors by operators. 1.

  • Geotechnical Considerations for Longwall Top Coal …

    2020-7-2 · 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 …

  • Latest Developments in Longwall Mining Technology

    2019-9-4 · supplying special shields for the longwall top coal caving method (LTCC), where extremely thick seams are being mined. This method utilizes a second AFC behind the shields to take the coal on top of the longwall outside of the face. Several such systems have been supplied and successfully installed in Australia at the