An investigation report has been published for a serious inrush incident that occurred at Cadia East mine in central NSW.
The inrush resulted from a build-up of water and cuttings in a blocked ventilation shaft during raiseboring operations. It pushed a 57 tonne bogger 30 to 40 m down a drive and a 6 tonne mini excavator about 300 m along a lower drive.
The investigation report, Serious inrush incident at Cadia East mine is available from the NSW Mine Safety website as is a safety alert on the incident, SA11-01 Water inrush from raisebore hole.
Further information on raiseboring and inrush is available in NSW Mine Safety publications:
MDG 1030 – Guideline for raiseboring operations, and
MDG 1030 TR Technical reference material for raiseboring operations. Both of these publications are combined in MDG 1030. See also MDG 1024 Guideline for inrush hazard management
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