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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.
Extraction is conducted by dragline and truck and shovel operations. A transition to underground mining is required to access the highest quality coal. [4] Extensive rehabilitation has resulted in Ensham being the largest certified area of progressive rehabilitation in an open cut mine in Queensland. [2]
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]
The Mexican Mining Chamber (Camimex) opposes the ban on open-pit mining, saying such a prohibition would cause a 1% contraction in the country's GDP and threaten some 200,000 jobs.
Larger scale open cut mining began in 1936, leading to the complete closure of all underground operations. [ 5 ] Coal seam fires that originate from spontaneous combustion in the old underground mine workings are a notable feature of this coal mine, typically flaring up when open cut mining intersects or nears those old underground workings.
Keanu Reeves' stolen luxury watch collection — which includes a $9000 Rolex — has been located by police in Chile, according to a report.. Local police confirmed that they found an engraved ...
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