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Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–6.0 m (2 ft 0 in – 19 ft 8 in) thick). The section of rock that is being mined, known as the longwall panel, is typically 3–4 km (1.9–2.5 mi) long, but can be up to 7.5 km (4.7 mi) long and 250–400 m (820 ...
In the longwall mining method, mine development is carried out in such a manner that large blocks of coal, usually 100 to 300 metres wide and 1,000 to 3,000 metres long, are available for complete extraction (see photograph ).
Longwall mining is a fast and mechanized method of coal mining where a large “wall” of coal is mined with a high-powered cutting system and the coal is transported out of the mine through a network of conveyors.
1 de mar. de 2019 · This paper reviews the development of U.S. longwall mining from an unknown to became the world standard in the past five decades with emphasis on automation.
- Syd S. Peng, Syd S. Peng, Feng Du, Jingyi Cheng, Yang Li
- 2019
Longwall mining is a highly productive underground coal mining technique. Longwall mining machines consist of multiple coal shearers mounted on a series of self-advancing hydraulic ceiling supports.
Longwall mining systems are capable of producing significant outputs from a single longwall face – 8 million tones per annum or more. When operating correctly the coal is mined in a systematic, relatively continuous and repetitive process which is ideal for strata control and for associated mining operations.
3 de feb. de 2016 · Since the early 1980s, longwall mining has developed into the safest, highest producing and most productive form of underground coal mining, rivalling the performance of many surface mining operations.
