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Rudna mine
The Rudna mine is a large mine in the west of Poland in Polkowice, Polkowice County, south-west of the capital, Warsaw. Rudna represents one of the largest copper and silver reserve in Poland having estimated reserves of 513 million tonnes of ore grading 1.78% copper and 42 g/tonnes silver. The annual ore production is around 13 million tonnes from which 231,000 tonnes of copper and 546 tonnes of silver are extracted. ==Incidents== On 20 March 2013, 19 miners were pulled alive and well from the mine after being trapped underground for seven hours, following a small earthquake the previous night.〔(【引用サイトリンク】url=http://worldnews.nbcnews.com/_news/2013/03/20/17376544-polish-rescue-workers-reach-19-miners-trapped-in-collapsed-shaft?lite )〕
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「Rudna mine」の詳細全文を読む
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