OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 33 Explosives Safety

Section 505 Blasting machine

Subsection 505(1) and 505(2)

Blasting machines have safety features that reduce the likelihood of unintentional detonation of explosives. Many blasting machines incorporate circuit test features that check the continuity of the blasting circuit to ensure that a successful detonation occurs. A battery or system of batteries is in general an unsafe alternative to a blasting machine and its use is prohibited for electric blasting.

Subsection 505(3)

While compact blasting machines are available for field use, batteries are far less expensive and their use for detonating unrecoverable explosives is permitted. Because charge sizes and hole depth are relatively uniform, seismic activities can rely on a minimum safe working distance when such activities are conducted. The exemption is restricted to the seismic industry.