OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 36 Mining

Section 641 Circuit testing

Subsection 641(1)(a)

Workers must be removed from the blasting area before blasting circuits are tested in the event that an unintended detonation occurs.

Subsection 641(1)(b)

Testing ensures continuity of the circuit and provides confidence of a successful detonation.

Subsection 641(2)

The minimum 10 minute time period ensures that sufficient time is allowed for the delayed detonator to do its job. In case a detonator is defective, the extra time might be sufficient for it to explode. The waiting period also allows dust and smoke from the blast to clear.