High potential incident
Summary: While drilling a new shot pattern, a drill rig inadvertently drilled a new hole about 300 mm from an unknown misfire in the previous shot pattern.
Recommendations to industry: The procedure for locating and mapping out blasting patterns should include controls to prevent misalignment or overlap of patterns with previously shot ground.
Additionally, blasting procedures should include inspections to identify misfired holes and the logging and communication to all relevant workers the location of these misfires.
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Thanks for the share PMJ!
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