Summary: During the process of preparing to grout a nitrogen hole drill casing, a casing fell to the floor. The casing hit a bolter handle, breaking it off. An operator was holding the handle at the time and suffered a shoulder injury.
Recommendations to industry: Mine operators should consider hazards from falls due to gravity because of failure of screwed connections or shearing by strata forces of the drill casings. Mine operators should support the casing at the base to prevent lower sections from falling where workers may be in close proximity to the bottom of the casing.