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13 December 2014. The recent catastrophic accident at Uralkali's Solikamsk-2 potash mine is not an isolated case. Over the past thirty years, numerous similar accidents, caused by sudden surface subsidence, occurred at potash mines located in and around Berezniki and Solikamsk cities in the Perm Region of Russia.

MINING.COM

http://www.mining.com/more-insane-pictures-of-russian-potash-mine-disaster-43899

 

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