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最深的大露天矿——美国宾厄姆(Bing-ham)铜矿。1976年采出矿岩1.42亿吨,其中矿石3000万吨,废石1.12亿吨。矿山于1904年开始开采,目前露天矿长4公里,宽2.4公里,开采高差800余米。最大的地下矿山——瑞典基鲁纳(Kiruna)铁矿。1975年采矿石2440万吨,目前正在进行扩建和深部开拓,最终规模将达3000万吨/年。矿体长约5公里,平均厚度90米,倾角45～65°,用无底柱分段崩落法开采,矿石通过
The deepest big opencast mine, the Bing-ham copper mine in the United States. In 1976, mining 142 million tons of ore, of which 30 million tons of ore, waste rock 112 million tons. Mines began mining in 1904, the current open-pit mine 4 km wide and 2.4 km, mining elevation of 800 meters. The largest underground mines - the Kiruna iron mine in Sweden. Mining ore in 24.4 million tons in 1975, is currently under expansion and deep exploration, the final scale will reach 30 million tons / year. Ore body length of about 5 km, an average thickness of 90 meters, dip 45 ~ 65 °, with non-pillar subsidence caving mining ore through