A WALL in a Central Queensland coal mine collapsed on Friday, forcing the mine to shut down.
Anglo American's Dawson mine near Moura - west of Gladstone and Rockhampton - had a high wall crumble on Friday evening.
A grainy photo of the event shows an avalanche of debris overwhelming heavy machinery on the site.
Anglo has confirmed there were no injuries and an investigation has been launched.
Construction Forestry Mining and Energy Union safety representative Greg Dalliston will visit the site on Wednesday.
"(Anglo) should have controls in place to stop that happening," he said.
There should be action taken if there was any sign of what Mr Dalliston described as a "geological failure".
"They were definitely lucky no one was seriously hurt," he said.
Mr Dalliston said the mine would remain out of action until the investigation was finished, but could give no indication on how long that would take.
An incident of this magnitude, he said, had not happened "for a few years" - the last one occurring at BHP Billiton Mitsubishi Alliance's Blackwater site.
The cause of the collapse is so far unknown.
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