A worker encountered an explosives hazard after detonators unintentionally initiated inside an explosives light vehicle during charging activities underground. The event occurred after the worker placed a battery-powered cable tensioning device into a detonator storage compartment that already contained detonators.
After completing cable tensioning work in an underground heading, the worker returned the device to the vehicle and stored it with the detonators. The worker then returned to the face to assist with charging operations. A short time later, workers heard popping sounds from the rear of the vehicle. They inspected the compartment, identified initiating detonators and a smouldering fire, moved behind the vehicle, suppressed the fire with a mine water hose and notified supervision.
The incident shows how workers can create ignition hazards when they place incompatible equipment inside detonator storage areas and compromise segregation controls. Workers involved in explosives handling can face catastrophic consequences when ignition sources and detonators occupy the same storage space.
Takeaways
- Maintain segregation controls: Keep detonator compartments free from equipment and potential ignition sources.
- Follow explosives procedures: Apply storage and handling requirements without deviation.
- Recognise ignition hazards: Assess battery-powered and electrical equipment before storing them near explosives.
- Withdraw to a safe location: Respond immediately to abnormal sounds, heat, smoke or fire.
- Position personnel outside danger areas: Move clear of explosives storage areas as soon as workers detect a hazard.
- Verify competency: Confirm workers have the training and supervision required for explosives handling activities.
