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by pm215 1970 days ago
After a little googling, I think this might refer to Hulton colliery, where there was a bad underground explosion (ignition of coal dust and gas) in 1910, killing 344 people. This long account of the accident https://www.nmrs.org.uk/mines-map/accidents-disasters/lancas... talks about the large electric fans used to ventilate the mines.