Uncontrolled muck ejection and rapid runs of material can cause critical injuries and fatalities

Hazard alert: Muck ejection or rapid run of material from the brow of a partially empty blasthole stope

An uncontrolled muck ejection – or a rapid slide or run of material at the brow – can be triggered by a fall of ground in a partially mucked out stope.

This hazard alert explains:

Uncontrolled runs of materials continue to cause serious injuries and fatalities in Ontario mines