Despite being a common on-bench incident, there is no formal industry guidance on what to do when personal items or components fall down a blast hole. Retrieval is one of the most overlooked steps in drill and blast, yet it directly affects safety, timing accuracy and production.
If anything falls down a loaded or unloaded blast hole, do not attempt retrieval. Stop work and report it to the shotfirer, site supervisor or Open Cut Examiner. Only authorised personnel can decide whether the hole is safe to access or must be treated as a misfire or rework.
Why retrieval matters
Lost detonator leads and boosters interrupt loading. Leaving a lost booster in the hole and loading another on top creates further risk: unpredictable energy behaviour, potential sympathetic detonation, and unreacted explosive trapped below stemming.
Improvised hooks and unsuitable tools raise the chance of misfires, collar damage and delays. A purpose-built tool lets crews recover items quickly without compromising hole integrity.
How a gravity-hook retrieval tool works
GOTCHA™ is lowered into the hole on a line. Its jaws open, orient and settle around the item. When tension is applied, the jaws tighten under load, so engagement increases with the weight of the object being recovered.
- Grade 316 stainless steel, non-sparking, with no moving parts
- Three sizes, for holes from Ø60 mm upward
- Clips straight onto the swivel of ODG-series dip tapes
- A booster compatibility chart shows which size suits each charge component
Typical uses
- Recovering slipped or buried detonator leads before loading continues
- Lifting boosters lost during collaring or loading
- Clearing components after a slump or unintended ingress
- Retrieving small tools or accessories dropped down the hole
The takeaway
Follow site procedures first. Where retrieval is approved, a purpose-built tool replaces guesswork with a controlled, repeatable method that keeps the bench moving.
