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Alli Moore

Alli Moore

Double Stitch

Where, on a vertical drill pattern, a half spaced angled row is drilled to provide energy into the toe area of the front row.

Dry Hole

A blast hole which contains no detectable water.

Dry Operation

The operation of a pump when there is no flow due to its inlet being closed, blocked or empty, or any other physical condition where the material being pumped is prevented from flowing into the pump.


Airborne particulate matter ranging in diameter from 10 to 50 microns.

Dynamic Water

Water that is in motion (i.e. flowing water).

A blast hole may be considered to contain dynamic water where the recharge rate is more than 1 m per hour.
Holes containing dynamic water cannot be dewatered and should be loaded with a pumped, water resistant product.


Diagonal line of blastholes in a staggered pattern.

echelon glossary pic


Thrown out violently.

Elemented Cap

Nonelectric detonator complete with delay train components, before assembly onto signal tube.

Exposed Site (ES)

A location that may be affected by an explosion somewhere else.

Extraneous Electricity

An unintended electrical current from a source other than the firing device which could initiate a detonator including stray currents,
induced currents, static electricity and radio frequency energy.

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Skip Manage Drill and Blast Operations 5 DAY MASTERCLASS