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Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, [1] is a surface mining technique that extracts rock or minerals from the earth. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface where the overburden is relatively thin.
The Rolleston Coal Mine is an open-cut coal mine located in Central Queensland, Australia, with reserves amounting to 600 million tonnes of thermal coal. The mine has an annual production capacity of 14 million tonnes. [1] It is one of numerous coal mines in the Bowen Basin. The mine is wholly owned by Glencore. [2]
Coal mining has had many developments in recent years, from the early days of men tunneling, digging, and manually extracting the coal on carts to large open-cut and longwall mines. Mining at this scale requires the use of draglines , trucks, conveyors , hydraulic jacks , and shearers.
As such they tend to be tabular, flat and really large, covering many square kilometres of the Earth's surface. However, at any one time the area of a deposit being worked for the nickel ore is much smaller, usually only a few hectares. The typical nickel laterite mine often operates as either an open cut mine or a strip mine. [citation needed]
The open-cut mine supplies coal to Tarong Power Station and Tarong North Power Station. It is owned by Stanwell Corporation and operated by Downer Mining. Work first started on the mine in 1978. [1] The mine has five active working pits. It can supply a maximum of seven million tonnes of coal per year. [1]
Hunter Valley Operations (HVO) is a multi-seam, multi-pit open cut mining operation located in the Hunter Valley, 24 kilometres (15 mi) northwest of Singleton and 110 kilometres (68 mi) from Newcastle. Production commenced at HVO in 1968 at the current West Pit, which was then part of the Howick mine.
The Middlemount Coal Mine is an open-cut mine located approximately 90 kilometres north-east of Emerald and some 7 kilometres west of the township of Middlemount in Queensland's Bowen Basin. The mine produces medium-volatile pulverized coal injection (PCI) coal and semi-hard coking coal for the export market. Full scale operations at the open ...
Evolution Mining itself had been formed in the 2015 A$1.2 billion merger of Catalpa Resources and Conquest Mining. [16] Apart from surface and underground mining at Edna May, ore was also carted to the mine's processing plant from the Marda mine surface operations to the north during the 2020–21 financial year.