Mr Junk died of serious head injuries after striking the underside of a working platform about 4.20am.

He was a contractor at the mine with McMahons for 18 months.

The Department of Trade and Invesment's Mine Safety Investigation Unit confirmed the deceased was wearing a safety helmet at the time of the accident.

Mr Junk was working on a kibble on the underside of the platform and was travelling up to the surface when the accident occurred.

Investigation Unit manager Steve Millington said a team will now examine, among other things, the design of the kibble installation, its suitability for transporting workers and what procedural or physical measures were in place to ensure workers remained within its confines.

"While man-riding in kibbles is an established practice in shaft sinking, the incident suggests the use of a purpose-built, man-riding conveyance should be considered wherever practicable," Mr Millington said.

Mr Millington said the kibble was suspended by a single head rope and had no guide ropes thereby allowing freedom of lateral movement and rotation.

He said at this stage investigators had determined the clearance between the kibble and the kibble well was relatively small where it passed through the two stage decks.

"This created a hazardous nip-point when people were raised in the kibble," he said.

A Darling River LAC spokesperson said it was working alongside the investigation team to determine how the fatality happened.

Cobar Shire mayor Lilliane Brady this week offered the community's deepest sympathies to the miner's family and his employers.

"What I love about Cobar is that we all come together in a time of need," Cr Brady said.

It is the first recorded fatality at CSA Mine since it reopened under the ownership of Glencore in 1999.

Investigations continue.