A sinkhole with a diameter of 30-40 meters has been detected to the east of the Solikamsk-2 production site, at the area packed with summer cottages. There were no casualties reported so far.

30-40 meters diameter sinkhole near the Solikamsk-2 potash mine (source: V-kurse.ru).

30-40 meters diameter sinkhole near the Solikamsk-2 potash mine (source: V-kurse.ru).

Some experts do believe that producing Solikamsk-1 mine adjacent to flooded Solikamsk-2 mine, likely to be flooded also, but it will not happen soon since there are two safety barriers installed between mines, – a 20 meters concrete wall and a 200 meters pillar, which entirely consists of potassium salt (see picture below).



Cross-section of Solikamsk 1 and 2 mines. Source: V-kurse.ru



Potentially, fresh water could mix with the brine in a flooded mine, which in turn may create microfractures in a concrete wall by that time.

Tectonic fractures are other possible way water/brine mix may penetrate and dissolve protective pillar.

Theoretically, this process may take years, if it really happens.

We will continue to monitor Uralkali’s official statements in this regard.