A burr on the blade caused the cut, which needed four stiches.
Workers should also constantly monitor strata conditions to identify areas that posed risks.
Silicosis is a deadly lung disease caused by ingesting dust.
The truck was unable to tip at the unloading area because of weather conditions.
Macdonald acted in 'best interests of the people of NSW', court hears.
No workers were in the immediate vicinity when the burst occurred.
The Bylong Valley Protection Alliance is seeking to ensure the IPC decision is not overturned.
Operating "downdraft" discharge systems allows fast purging of dust affected internal environments.
When the operator released the foot brake, the machine rolled backwards.
It will have multiple focus areas including the selection of self-worn breathing apparatus.
The slip was noticed early enough to remove all workers from the area.
Greens said it provides just transition provisions to protect workers employed in thermal coal.