OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 36 Mining

Section 653 Misfires

Subsection 653(1)

Exposing a misfire by digging is an extremely dangerous activity. It must be done very carefully under the direct supervision of a blaster or competent worker appointed by the employer. This person must ensure the excavator’s bucket or other parts do not contact the explosive.

To be consistent with section 610 of the OHS Code, it is expected that while not being the designated blaster, the competent person would hold a valid mine blaster certificate.

Subsection 653(2)

Drilling near a misfire is very dangerous. The blaster or competent worker appointed by the employer will have to determine if the explosive has travelled from the hole into the surrounding ground being selected for drilling. If not done properly, the drilling operation could cause the remaining explosives to explode.