In a statement provided to the ASX, Northern Star Resources Limited said it was assisting authorities in their investigation and confirmed no other workers were involved in the incident.
"Northern Star Directors, management and staff extend their deepest sympathy and condolences to the man's family, friends and colleagues at this tragic time," the company said.
A Department of Mines and Petroleum spokeswoman told AAP two inspectors were expected to be sent to the mine on Monday afternoon.
A Police spokeswoman said the death was not being treated as suspicious and a report would be prepared for a coroner.
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