PERTH (miningweekly.com) – Iron-ore miner Mount Gibson Iron on Wednesday went into a trading halt, after a further slump in the Main pit seawall, at its Koolan Island mine, in Western Australia, interrupted geotechnical repairs at the site.
Last month, operations in the Main pit were temporarily suspended as a precautionary measure to allow the company to monitor and repair an area of instability in the upper part of the southern pit wall.
An assessment of the instability identified that additional remedial actions would be required to complete repairs and enable production to resume safely.
Mount Gibson said on Wednesday that no personnel were at risk during the latest incident, with mining remaining suspended at the Main pit.
The miner has previously lowered its full-year sales guidance from between 6.6-million and 7-million tonnes to between 6-million and 6.4-million tonnes following the change in schedule at its Koolan Island operations.
Mount Gibson shares were expected to resume trading on Friday.