to Supply Two Complete Longwall Top Coal ...

2021-8-6 · 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 ...

How does Longwall Top Coal Caving work? LTCC Mining ...

2018-7-19 · 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 …

The above-mentioned research results have been applied in the Jurassic 1.1 m hard coal thin seam of Northeern Shaanxi, the fully-mechanized mining of the Jinjitan Coal Mine with an ultra-large cutting height of 8 m and the fully-mechanized top-coal caving

Coal Zoom | Longwall Top-Coal Caving: A Productive and ...

2018-12-4 · Longwall Top-Coal Caving: A Productive and Efficient Alternative . December 4, 2018 - 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 people far from the dangers of the ...

Key technology for fully-mechanized top coal caving with ...

Fully-mechanized top coal caving with large mining height is the main mining method for extra-thick coal seam.Howeveras the hight of coal cutting and coal caving increasesprominent problems such as severe mine pressurebehavioursevere rib spalling in working facelow top coal recovery rate and high gas emission rate and so on emerge.

Water Injection in Longwall Top-coal Caving Face in China

2020-11-4 · WATER INJECTION IN LONGWALL TOP-COAL CAVING FACE IN CHINA ---h=5m -·+--h=6m t-h=7m L(m) -4 -2 4 6 8 10 12 14 16 18 Figure 3. The relationship between Sand L. Depending on development characteristics of cracks,

Top Coal Caving PresentationV5

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

2020-3-1 · Introduction. 1 New technologies of mine exploitation in China. 1.1 Top coal caving mining technology in extremely large-scale mines. 1.1.1 Geological production conditions of the Tashan Coal Mine. 1.1.2 Coal mining techniques. 1.1.3 Equipment configuration. 1.1.4 Roof management.

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 …

National Awards- ...

2017-10-10 · "The key technology and equipment of extra thick coal seam full-mechanized top coal caving mining technology with great mining height" Wang, Jiachen(6) 5 The 2nd prize of National Advancement Award of Science and Technology in 2014

OptimizationofCavingTechnologyinanExtrathickSeamwith ...

2021-8-4 · top coal are core researches in LTCC. Effective fracture of top coal is the premise of smooth top coal drawing, and the recovery ratio is the comprehensive reflection of the broken degree of the top coal body. e optimization of top coal caving technology is an efficient approach to improve the recoveryratioinLTCCpanels.Toimprovetherecoveryratio

Key technologies and equipment for a fully mechanized top ...

Ultra-thick coal seams Top-coal caving mining Large mining height Mining method Mining equipment Roadway support Safety guarantee DOI : 10.1007/s40789-015-0071-4 : 46 : 2015 ...

Key technologies and equipment for a fully mechanized top ...

2015-12-9 · Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams

Application of Longwall Top Coal Caving in Challenging ...

2020-1-8 · The combination of High Reach and Top Coal Caving is the only solution available for mining ultra-thick seam in one single pass. Besides other risks for the ordinary LTCC operations, roof/wall failure is of special concern for High Reach LTCC. Severe spalling and unexpected roof falling may occur and lead to the cease of operation. It is known that the spalling issue is related to the cutting height, strata …

Top-coal caving structure and technology for increasing ...

【Abstract】In order to overcome the poor caving property problem of extra-thick hard coal seam with shallow depth in mining area of west China, the top-coal caving structure and recovery rate improvement technologies are analyzed through theoretical model calculation, numerical modeling analysis and equipment structure optimization design based on the coal seam occurrence conditions at ...

Study of automated top-coal caving in extra-thick coal ...

Introduction. 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 ...

top coal caving Archives

2021-8-24 · 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 …

Studying of dynamic bear characteristics and adaptability ...

2017-1-24 · of top coal caving mining with great mining height. 2. The equipment coordination of top coal caving mining with great mining No.8105 working face of TaShan coal mining is the first primary equipment of China producing million tons per year top-coal caving face with higher mining. The average thickness of 3-5 coal seam is

Mining Safety of Longwall Top-coal Caving in China

2020-5-13 · 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. Concerns of safety and productivity

Longwall Top Coal Caving (LTCC) Mining Technology

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.

Functional schemes of automated and robotic control of ...

The article proposes functional schemes of automated and robotic control of 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 ...

Geotechnical Considerations for Longwall Top Coal …

2020-10-13 · 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

Key technologies and equipment for a fully mechanized …

2017-8-26 · Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams Jinhua Wang1 • Bin Yu2 • Hongpu Kang1 • Guofa Wang1 • Debing Mao1 • Yuntao Liang3 • Pengfei Jiang1 Received: 20 February 2015/Revised: 15 March 2015/Accepted: 18 March 2015/Published online: 21 July 2015

Functional schemes of automated and robotic control of ...

The article proposes functional schemes of automated and robotic control of 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 …

Longwall Top Coal Caving (LTCC) technology

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.

Comparative Analysis of Overburden Strata Movement in ...

Key technology of complete equipment for fully-mechanized top coal caving face with large mining height in extra-thick seam [J] . Coal Science and Technology, 2013, 41(9): 1~5. DOI: 10.1109/icmt.2011.6002055

Research on the Influence of the Key Stratum Position on ...

2021-4-8 · In recent years, in order to increase the coal recovery rate, the large mining height fully mechanized top-coal caving mining has been widely used because it has the advantages of both fully mechanized mining method and large mining height mining method. When this mining technology is used to exploit thick coal seam under upper goaf, the movement characteristics of the overlying strata and …

Long wall top coal caving

2017-11-15 · Long wall top coal caving 1. LONGWALL TOP COAL CAVING P SHASHIKANTH 16MT001042 2. LONGWALL TOP COAL CAVING GENERAL INFORMATION • It is the modified method of longwall mining system • Yancoal introduced the Longwall Top Coal Caving …

to Supply Two Complete Longwall Top Coal ...

2021-8-26 · Both longwall systems are designed for longwall top coal caving (LTCC) in a coal seam with an average thickness of 25 meters (82 feet). is the leading supplier for the coal producing industry in Turkey with four out of five longwall underground mining systems in operation.

Viewpoint Mining Magazine

The Longwall Top-Coal Caving (LTCC) method makes use of a second conveyor and the natural force of gravity to recover coal above the shearer''s recommended height once the face has advanced.

Longwall Top Coal Caving (LTCC) technology

Top Coal Caving | Longwall | underground COAL

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 ...