Top Coal Caving Equipment

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 …

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.

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.

top coal caving equipment . Sep 10, 2008· 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

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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

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

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.

top coal caving equipment . Sep 10, 2008· 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

Due to the unbalanced top coal drawing process, the recovery ratio is low, and the equipment stability is poor in the longwall top coal caving mining (LTCC) with an inclined seam. Aimed at these problems, this paper proposes the dynamic group caving method (DGCM). The basic procedure is that when the drawn volume of top coal from a support reaches about half, the next support begins drawing ...

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.

Longwall Top Coal Caving Method Linkedin Slideshare, Feb 19 2014 ltcc longwall top coal caving ltcc is a method of extraction for underground mining of thick seams it uses a longwall setup and natural forces to aid in the winning of coal 4 Top Coal Caving Mining Method

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 an operation.

Longwall Top Coal Caving. 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 ...

21-07-2015· 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 were extensively …

A wide variety of coal equipment options are available to you, such as natural circulation, once through. There are 14,066 suppliers who sells coal equipment on Alibaba.com, mainly located in Asia. The top countries of suppliers are India, China, and Taiwan, China, from which the percentage of coal equipment supply is 1%, 99%, and 1% respectively.

Longwall Top Coal Caving Method Linkedin Slideshare, Feb 19 2014 ltcc longwall top coal caving ltcc is a method of extraction for underground mining of thick seams it uses a longwall setup and natural forces to aid in the winning of coal 4 Top Coal Caving Mining Method

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.

01-10-2019· In China, the reserve and production of thick seam coals accounts for 45% of underground coal resources and production, and the longwall top-coal caving technique (LTCC) is one of the major mining methods used to extract thick coal seams.1, 2, 3 The technique was first applied in the 1940s in Russia and subsequently used in France, former Yugoslavia, Hungary, Romania, former …

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

When the top coal caving method was initially employed at Broadmeadow it was the company’s first mine in Queensland to use it. Employing this method was expected to lift recoveries from around 60% to 90% in the Goonyella Middle Seam and increase production rates, it said in a 2013 briefing.

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 ...

01-10-2014· 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 ...

Figure 1 Top coal caving mechanism used in COSFLOW simulation . The in-situ stresses should be considered properly to asses the risk and efficiency of a modern day longwall mine. In addition, the stresses released and breakage mechanism of top coal should also be considered for a Top coal Bottom coal step n step n -1

The top coal plastic zone under different support strength in fully-mechanized top coal caving working face 1322 is shown in Figure 5 . Energies 2017 , 10 , 1406 8 of 12