Qld BHP workers launch industrial action

BHP workers at Queensland coal mines have launched protected industrial action. (Dave Hunt/AAP PHOTOS) (AAP)

Workers at mining giant BHP-Mitsubishi Alliance's four central Queensland coal mines have launched industrial action in a dispute over job security.

Protected industrial action is under way at the company's Blackwater, Saraji, Peak Downs and Goonyella Riverside mines with bans on overtime and step-up duties.