On 24 July 1979, 14 miners were killed in an explosion in the underground mine in Appin, a small town situated 35 kilometres north-west of Wollongong. The explosion was caused by a rush of methane gas in the K panel which was a remote area of the mine situated three kilometres below the surface.
There were 45 individuals working in the mine at the time of the explosion. Ten miners were killed in the crib room while another four were killed in other areas of the mine.