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The Grootegeluk Coal Mine is an open cast coal mine within the Waterberg Coalfield of the Limpopo province of South Africa. It is operated by Exxaro. The mine is from Lephalale, and employs 2,000 people. ==Discovery== In 1920, coal was found in the Ellisras Basin, but at first little was done to investigate the size of the resource. Between 1941 and 1952, 143 diamond-drill holes and two prospecting shafts were sunk to obtain a geological map of the Waterberg coalfield. In 1957 Iscor (now Mittal Steel South Africa) bought surface rights on six farms located in the coalfield. In 1973 Iscor began detailed exploration of the deposits below the farms to determine the quality and quantity of coal. In 1979 Iscor obtained the mining leases on the farms and in 1980 established the Grootegeluk Coal Mine. The mine contains semi-soft coking coal, thermal coal and metallurgical coal. There is estimated to be 2,800 Mt of accessible coal out of a total measured resource of 4,600 Mt of coal. A overburden covers of usable coal, which is interspersed with three dirt bands that total in thickness. The raw coal has less than 25% of burnable substance. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grootegeluk Coal Mine」の詳細全文を読む スポンサード リンク
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