The Queensland Mines Inspectorate said the operator lost control of the fully-laden truck on a recently watered road and the truck rolled onto its side.

"The coal mine worker had limited experience in driving the equipment," it said.

"Site training requirements did not include specific training related to wet road conditions, the vehicle dynamics and appropriate use of retarders."

The inspectorate said site senior executives had to ensure vehicle training procedures include variable road conditions including wet surfaces.

"Ensure all operators are exposed to wet road driver training," it said.

"Ensure site vehicle training includes competency training in all aspects of vehicle operation."