One worker has died and another is in a stable condition following a mining incident at the Oaky Creek Coal mine complex in central Queensland.

Paramedics were called to the incident at Oaky Creek Mine Access Road near Tieri at about 4:35pm.

The Queensland Ambulance Service said two patients were assessed.

Resources Safety and Health Queensland has confirmed it is investigating the incident but says it is too early to detail what had happened.

In a statement, the Mining and Energy Union confirmed the fatality happened at the complex's Oaky North site.

Queensland district president Mitch Hughes described the incident as devastating.

He said workers across the industry were still coming to terms with recent fatalities at the Byerwen mine.

"We will leave no stone unturned in uncovering what has gone wrong," Mr Hughes said.

"We extend our heartfelt condolences to families, friends and workmates of the deceased worker."

The union said its own industry safety and health representatives were travelling to the site to investigate. 

Glencore has been contacted for comment.