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The Polkowice-Sieroszowice mine located in the Legnica-Glogów Copper Belt of Poland is the second biggest silver mine in the world. The copper-silver mine, which is owned and operated by state-owned mining enterprise KGHM, produced more than 14Moz of silver in 2012. The proven and probable silver reserves of the mine were estimated at 545Moz as of December 2011. Polkowice-Sieroszowice is an underground mining operation that uses blasting to extract ore from the Polkowice, Sieroszowice and Radwanice deposits. Extracted ore is processed at the Polkowice-Sieroszowice mining plant which has been in operation since 1996. The mine’s total contained silver reserves stand at 775Moz, including its share of reserves in the Deep Glogów deposit located adjacent to it. KGHM plans to mine 50% of the Deep Glogów deposit through the Polkowice-Sieroszowice operation - ""

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