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The cause of all accidental detonations:
Heavy duty insulated wires used to extend an electric blasting circuit to the firing point.
The time period during which a blast may be fired. Planned firing time will be communicated to any person who may be affected by the blast.
An explosives magazine constructed in accordance with AS 2187.1 in a manner which precludes relocation to another site.
Of a flammable liquid is the lowest temperature at which it can form an ignitable mixture in air.
Fluid Sensitive Detonator
Rock that is projected outside the blast clearance zone or outside the site limits must be classed as flyrock.
Explosives having more Bubble energy throw out more fly rock than the ones where strain energy dominates.
Blasting parameters like burden, spacing, charge per hole, stemming, and delay interval play an important role in the throw of the blast. Burden should be selected to take into account the crater effect where in rocks get thrown out from cavities or weak zones in the bench. There should also be adequate delay between rows of holes to allow room for the rock to swell and displace previously blasted material.
Formal Risk Assessment
A formal risk assessment will contain, as a minimum, the following components:
Example of completed Formal Risk Assessment.
Example of Risk Cube to rate risk.