Longwall Top Coal Caving Mining

Longwall top coal caving ltcc is a special designed longwall mining method for very thick seams thickness is more than 45m 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 topcoal caving technology has developed rapidly in china in recent years the application of longwall topcoal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 50 using standard longwall equipment annual production

In coal mining origins of longwall mining the other principal method of modern mining longwall mining had been introduced as early as the 17th century and had found general use by the 19th century but it had long been less productive than roomandpillar mining

The preferred mining method for these thick coal seams is the longwall top coal caving ltcc the connection of both the top coal caving and its compactness are still rare therefore the

International longwall news brings you two detailed reports on the status of longwall top coal caving in australia international longwall news brings you two detailed reports on the status of longwall top coal caving in australia lase easy storage yard management systems for mining and coal sponsored lase putting relationships first

Ltcc longwall top coal caving looking for abbreviations of ltcc it is longwall top coal caving longwall top coal caving listed as ltcc presentations discuss the latest developments related to longwall mining seam height is 8 to 10 meters

Not all the coal would be recovered but recoveries of 7580 of the full seam in the block are achievable the system also allows the initial mining height to be reduced to a preferred working height without losing coal the top coal caving is a modified longwall mining system equipment selection of longwall top coal caving mining

White paper efficient mining of high longwall seams thru automation of longwall top coal caving longwall mining is an expensive undertaking from the preparation of the site to capital investment in the equipment that is why longwall owners have high performance expectations especially in tough economic times when commodity prices are low

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

Longwall topcoal caving technology has developed rapidly in china in recent years the application of longwall topcoal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 50 using standard longwall equipment annual production

Roof supports for special applications our longwall top coal caving ltcc roof supports allow mining of seams up to 10 m 328 ft following a conventional cut with a shearer to about 3 m 98 ft the roof supports move forward and allow the caving coal to fall via controllable caving shields onto a second conveyor mounted gobside

There is an urgent need for implementation of effective thick seam extraction technologies in australia to improve resource recovery and productivity levels in underground coal mining the longwall top coal caving ltcc method which is being used successfully in china offers a great potential for thick seam extraction in australia

53 mining safety of longwall topcoal caving in china jian wu 1 yueping qin 1 and minghua zhai1 1china univ of mining and technology 011 xueyuan road haidian dist beijing 100083 pr of china 2zhangji coal mine xuzhou mining bureau xuzhou 221147 jiangsu province pr of china abstract longwall topcoal caving technology has developed rapidly in china in recent years

Longwall top coal caving longwall top coal caving ltcc is a special type of longwall mining applicable to very thick seams greater than 45m where good quality coal is being left because conventional longwall equipment has not yet been designed to operate successfully beyond around 5m mining

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 seam

Longwall topcoal caving tcc 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 with this method of extraction only a single longwall is developed at the foot of the seam the control of the roof layers at the face is by means of powered supports

A 3d particlebased 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 faceend

There is an urgent need for implementation of effective thick seam extraction technologies in australia to improve resource recovery and productivity levels in underground coal mining the longwall top coal caving ltcc method which is being used successfully in china offers a great potential for thick seam extraction in australia

Longwall topcoal 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 196 ft longwall topcoal caving can more than double the resource recovery rate of normal longwall equipment working in high seams

Longwall topcoal caving isnt just an alternative mining technique it can be the difference between a productive profitable mine and an unsustainable operation the technology reduces waste and operating costs making for a more efficient operation