The Worlds Worst Mining Disasters ThoughtCo
05/03/2019· The death toll was 439, making it the most deadly mine accident in the UK. This was the worst of a spate of mine disasters in Wales that occurred during a period of poor mine safetyfrom 1850 to 1930. On June 25, 1894, 290 died at the Albion Colliery in Cilfynydd,an in a gas explosion.



































