OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 36 Mining

Section 647 Detonating cord

Subsection 647(1)

When priming drill holes using detonating cord and primers, care must be taken to ensure that down-lines are secured at the top of the hole with sufficient excess cord to allow for settling of the explosive column and stemming.

If insufficient cord is provided, the settling column could pull the cord down. This would require other risk increasing actions to assure initiation of the explosive column during subsequent blasting operations.

Subsection 647(2)

To minimize the potential for unplanned separation of the explosives column and only partial initiation, loading operations, from priming through to stemming should be as continuous as practicable.

Subsection 647(3)

The specific requirements noted are essential for ensuring safe and successful blasting operations.