The pictures are taken from SVT Nyheter Dalarna 2015 - after a previous fire in the Garpenberg mine.
This is how a rescue chamber works
2020-02-06T14:38:03.959Z
Follow in the deep and hear how the miners handle a dangerous situation. In the event of a fire, the so-called rescue chambers in the mine act as a temporary protection for the personnel.
Source: svt