Apr 30, 2015· Caterpillar has extensive experience in the design of roof supports for specific mining conditions. Cat Longwall Top Coal Caving (LTCC) roof supports allow m...
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
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 (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.
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
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
Jinglong Coal mine is located in Henan province, China. The longwall mining method was used and mined the whole seam thickness by the top coal caving method. The mining depth was 372.1~481.6 m with an average of −430 m. The average dip angle was 9°. Coal mined in the area was 6~8.25 m thick.
Oct 24, 2013· 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) 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 (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.
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
Oct 24, 2013· 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.
Both seams have simple structures and well field profiles, as well as stable horizons. The longwall top coal caving (LTCC) method is applied to the working face, with a mining height of 3.5 m and a caving height of 3 m. Thus, the mining-to-caving ratio is 1 : 0.86, and the average daily advance speed is
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
Jul 02, 2014· 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
A good understanding of the caving mechanisms of loose top-coal is significant for longwall top-coal caving (LTCC) mining. In this paper, the equations of the particle motion, top-coal boundary, and drawing body were derived based on the stochastic medium theory. Then, the particles moving boundary and the shape of the top-coal loss were discussed, and the dynamic evolvement of the top-coal
Sep 09, 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.
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.
Oct 29, 2019· 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 its successful application in Australia since 2005.
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
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.
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.
Aug 08, 2020· Associate Professor, Coal Industry Engineering Research Center of Top Coal Caving Mining, China Univ. of Mining and Technology, D11 Xueyuan Rd., Haidian District, Beijing 100083, China. Email: [email protected]
Low coal seam mining ground adjustment . Our advantages. The longwall coal mining technology has been successfully applied in coal mine with thickness of 0.8m, the maximum dip angle 45 °. Low coal seam comprehensive mechanized mining range 0.45m ~ 2.5m. Low Coal Seam Longwall Coal Mining Units Equipment . Low coal seam series drum electric
Our Longwall Top Coal Caving (LTCC) roof supports allow mining of seams up to 10 m / 32.8 ft. Following a conventional cut with a shearer to about 3 m / 9.8 ft, the roof supports move forward and allow the caving coal to fall via controllable caving shields onto a second conveyor mounted gob-side.
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
Figure 3 Longwall top coal caving system GEOTECHNICAL CONSIDERATIONS FOR LONGWALL TOP COAL CAVING Development and installation roadways . The development process at Austar is no different to that of a traditional longwall mining operation. The normal development roadway dimensions are < 5.2 m wide x 3.2 m high, these dimensions are at the
May 05, 2020· The first caving of top coal and the first weighting of roof strata in Longwall Top Coal Caving (LTCC) mining were analyzed in a parametric study by using a discontinuum modeling technique with plastic rock material. The analysis demonstrated that an increase in the value of cover depth decreases the stability of main roof strata, while the
The mine also made the wise decision it would seem not to go down the longwall top coal caving route, instead reconfiguring the size of the face. Seam height is 8m to 10m, but Whitehaven determined that extending the longwall face—to as wide as 400m—will be more cost effective than would mining shorter face widths with longwall top coal
BBR study of top-coal drawing law in longwall top-coal caving mining. Journal of the China Coal Society,2015, 40(3): 487-493. (1 0 ) Wang JC, Zhang JW,Yang SL, Song ZY. 3-D movement law of top-coal in near horizontal coal seam with multi-gangue under caving mining technique.
Oct 29, 2019· 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 its successful application in Australia since 2005.
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.
Mining operations in section “b” are similar to conventional longwall top coal caving (CLTCC) while the working of section “c” is similar to multi-slice longwall mining technology. The shield support has a wire mesh laying device on the top to form an artificial roof for the next section “a” of the next new panel.
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
Oct 29, 2019· 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 its successful application in Australia since 2005.
Our Longwall Top Coal Caving (LTCC) roof supports allow mining of seams up to 10 m / 32.8 ft. Following a conventional cut with a shearer to about 3 m / 9.8 ft, the roof supports move forward and allow the caving coal to fall via controllable caving shields onto a second conveyor mounted gob-side.
Aug 08, 2020· Associate Professor, Coal Industry Engineering Research Center of Top Coal Caving Mining, China Univ. of Mining and Technology, D11 Xueyuan Rd., Haidian District, Beijing 100083, China. Email: [email protected]
Low coal seam mining ground adjustment . Our advantages. The longwall coal mining technology has been successfully applied in coal mine with thickness of 0.8m, the maximum dip angle 45 °. Low coal seam comprehensive mechanized mining range 0.45m ~ 2.5m. Low Coal Seam Longwall Coal Mining Units Equipment . Low coal seam series drum electric
May 26, 2017· 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
Figure 3 Longwall top coal caving system GEOTECHNICAL CONSIDERATIONS FOR LONGWALL TOP COAL CAVING Development and installation roadways . The development process at Austar is no different to that of a traditional longwall mining operation. The normal development roadway dimensions are < 5.2 m wide x 3.2 m high, these dimensions are at the
May 05, 2020· The first caving of top coal and the first weighting of roof strata in Longwall Top Coal Caving (LTCC) mining were analyzed in a parametric study by using a discontinuum modeling technique with plastic rock material. The analysis demonstrated that an increase in the value of cover depth decreases the stability of main roof strata, while the
There exist several different methods in Turkey and in the world to operate longwalls of thick coal seams in underground mines. The most important ones are Single Pass Longwall (SPL), Multi-Slice Longwall (MSL), and Longwall Top Coal Caving (LTCC). In this paper these methods are compared to eachother both from the technical and economical perspectives.
Mining operations in section “b” are similar to conventional longwall top coal caving (CLTCC) while the working of section “c” is similar to multi-slice longwall mining technology. The shield support has a wire mesh laying device on the top to form an artificial roof for the next section “a” of the next new panel.
BBR study of top-coal drawing law in longwall top-coal caving mining. Journal of the China Coal Society,2015, 40(3): 487-493. (1 0 ) Wang JC, Zhang JW,Yang SL, Song ZY. 3-D movement law of top-coal in near horizontal coal seam with multi-gangue under caving mining technique.
Jul 09, 2007· Other exhibits include the revolutionary Longwall Top Coal Caving (LTCC) roof support, the EL62 — said to be the most powerful medium-seam
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 []
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
The Principle of Longwall Top Coal Caving (LTCC) Caterpillar has extensive experience in the design of roof supports for specific mining conditions. Cat Longwall Top Coal Caving (LTCC) roof supports allow m...