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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 (820–1,310 ft) wide.
BMA's newest punch longwall underground operation on the Goonyella Riverside lease, commenced longwall mining in August 2005. Broadmeadow Mine is located 30 km north of Moranbah and 190 km south west of Mackay and has the capacity to produce over three million tonnes of high quality coking coal a year. Goonyella Riverside
Unlike other mines in Ohio, Century Mine used longwall technology that enabled it to operate with relatively fewer workers. [4] The mine had applied for a permit to extend operations by five years in 2017 and expected reserves to last for another 35 years. [6] Century Mine was the site of a fatal accident in 2011 [7] and another in 2013. [8]
Store Norske Spitsbergen Kulkompani (SNSK), or simply Store Norske, is a Norwegian coal mining company based on the Svalbard archipelago. It was formed in 1916, after a Norwegian purchase of the American Arctic Coal Company (ACC). The company has 360 employees and operated two coal mines.
South Eastern Coalfields Limited (SECL) is the largest coal producing company of India. It is a "Miniratna" Company , and one of eight fully owned subsidiaries of Coal India Limited . [ 1 ] [ 2 ] The company has its headquarter at Bilaspur , Chhattisgarh , India and 92 mines spread over Chhattisgarh & Madhya Pradesh ; 70 underground, 21 ...
Shortwall mining – A coal mining method that accounts for less than 1% of deep coal production, shortwall involves the use of a continuous mining machine with moveable roof supports, similar to longwall. The continuous miner shears coal panels 150–200 feet wide and more than a half-mile long, depending on other things like the strata of the ...
Consol Energy's flagship operation is the Pennsylvania Mining Complex, which includes three large underground mines capable of producing approximately 28.5 million tons of coal per year. Consol's coal division [ 5 ] received the U.S. Department of the Interior's Office of Surface Mining National Award for Excellence in Surface Mining for the ...
Longwall systems have their own hydraulic roof supports which advance with the machine as mining progresses. As the longwall mining equipment moves forward, overlying rock that is no longer supported by coal is allowed to fall behind the operation in a controlled manner. The supports make possible high levels of production and safety.