Dahlusch Bomb mine collapse rescue device. Invented in 1955, but most famously used in the 1963 West German Lengede mine rescue.
More:
https://en.wikipedia.org/wiki/Wunder_von_Lengede
https://en.wikipedia.org/wiki/Dahlbusch_Bomb
https://en.wikipedia.org/wiki/F%C3%A9nix_capsules
Previously:
How an old miner's lamp works - GIF
Coal miner poma lift - GIF
Underground mining cart toilets - photo
Transporting an enormous mining truck in the Chilean desert - video
Coal mine canary reviving chamber - photo
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