The explosion cut the electricity supply to the mine, shutting off lighting and ventilation systems.
When he regained consciousness Mr Rockhouse put on his self-rescuer (breathing apparatus) and dragged himself to a nearby telephone.
By the time he reached the mine exit, Mr Rockhouse was disoriented, and was suffering from the effects of smoke and gas inhalation.
Both men were taken to Greymouth Hospital where Mr Rockhouse was treated for smoke and gas inhalation, and carbon monoxide poisoning.
Mr Rockhouse's determination to rescue him slowed down his own escape from the mine, through poisonous gas and smoke and constantly fearing further explosions.