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The worker was last seen underground at 11.30am (AEST) yesterday, and was reported missing at 3.30pm.
Operations have ceased while the search is underway.
"Emergency procedures were activated and we are currently trying to locate the missing person in conjunction with the police," MIM said.
The state's Mines Rescue Service is also assisting the effort.
No further details are available on the missing worker, and it's unclear what role he performed at the mine.
