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Retreat mining is a method in which the pillars or coal ribs used to hold up the mine roof are extracted; allowing the mine roof to collapse as the mining works back towards the entrance. This is one of the most dangerous forms of mining, owing to imperfect predictability of when the roof will collapse and possibly crush or trap workers in the ...
Longwall mining – A set of longwall mining equipment consists of a coal shearer mounted on a conveyor operating underneath a series of self-advancing hydraulic roof supports. Almost the entire process can be automated. Longwall mining machines are typically 150–250 metres in width and 1.5 to 3 metres high.
Power shovels are used principally for excavation and removal of overburden in open-cut mining operations; they may also be used for the loading of minerals, such as coal. They are the classic equivalent of excavators, and operate in a similar fashion. Other uses of the power shovel include: Close range work. Digging very hard materials.
Basic coal tipples simply load coal into railroad cars. [1] Many tipples had simple screening equipment to sort coal pieces by size before loading. [2] [3]: 20 A modern coal mine facility usually includes a coal preparation plant which washes coal of soil and rock, before loading it for transport to market. The term "tipple" may be used ...
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 (820–1,310 ft) wide.
It was used to produce town gas or coke, raise steam in industrial boilers or locomotives, to fuel power stations or for domestic heating. Blackdamp. Blackdamp is the name given to a mixture of carbon dioxide and nitrogen. [1] Blower. A blower was a source of firedamp issuing into the mine from a fissure in the coal. [6]
Accidents involving the improper use of equipment and collapsing mines were frequent occurrences. Coal-mining was also one of the many dangerous jobs that employed child workers. Children were ...
Pages in category "Mining equipment" The following 77 pages are in this category, out of 77 total. ... Coal homogenization; Conveyor bridge; Corf (mining) Crusher;