The mine operator and the injured worker's employer are co-operating with the investigation.
Emissions are from its Peppertree quarry near Marulan, NSW.
There are still 26,000 people to complete the workplace safety sessions.
Illegal limestone miner in SA faces the music.
Man in his 40s killed in a truck rollover.
An old quarry in Geelong will be rehabilitated and turned into a giant freshwater lake.
Miners are responsible for the health and safety of all people on site, the NSW District Court warns....
Quarry faces prosecution over electrocution death of a local resident.
Seven kidnapped Macmahon workers have been released.