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Safety Alert: Drill Mast Bolt Fatigue Failure

Friday, July 26, 2013

Queensland Government’s mines safety inspectorate has issued a safety bulletin following a recent incident involving fatigue failure of drill mast bolts.  In the incident, a blast hole drill rig mast was being lowered from the vertical to horizontal position. Its top end was about one metre from its horizontal resting position when a bearing block capping bolt failed. More…..