A CONTRACTOR working at Cadia Valley Operations (CVO) collapsed and died yesterday morning while working underground.
Cadia general manager of projects Leigh Cox said it was with great sadness that he confirmed the man's death.
"The deceased collapsed from unknown causes while working underground at the Cadia East mine," he said.
"Efforts to revive him on scene and at Orange Base Hospital were unsuccessful."
Mr Cox said the man's next of kin had been notified and CVO was working with the NSW Police and the independent health and saftey body Mines Inspectorate to investigate the matter.
"CVO has provided counselling to personnel involved, and offered assistance to the deceased's employer," he said.
"We extend our sincerest condolences to family, friends and colleagues, and we will provide whatever assistance we can at this difficult time."
Police have not realeased the man’s name.