Coalbrook mining disaster Wikipedia
The Coalbrook mining disaster is the worst mining disaster in the history of South Africa. The disaster occurred in the Coalbrook coal mine of Clydesdale Colliery on 21 January 1960 at around 19:00 when approximately 900 pillars caved in, almost 180 metres underground. The mine is situated in the Northern Free State, 21 km south west of Vereeniging. ...