RECOVERY operations have begun at Anglo American's Moranbah North underground mine afer it was shut down following the roof collapse of a main conveyer drift last Monday.
The company has launched an investigation into the incident.
"Operations have been halted due to a slump of ground in a conveyer drift," an Anglo spokeswoman said.
"No one was injured and safety recovery operations have commenced in consultation with the Mines Inspectorate and the Department of Employment, Economic Development and Innovation."
Anglo has asked some employees to take annual leave.
CFMEU Mackay district president Steve Pierce said the incident had placed uncertainty on some jobs.