If the remaining part of a blast hole does not contain explosive, what is this condition called?

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Prepare for the Mine Safety DAO 2000-98 Test. Study with flashcards and multiple-choice questions, each with hints and explanations. Get ready to pass!

Multiple Choice

If the remaining part of a blast hole does not contain explosive, what is this condition called?

Explanation:
In blasting terminology, bootleg describes a borehole that is not fully charged with explosive, leaving a portion of the hole without explosive. This loading defect means part of the hole is inert, which changes how the blast energy is released and can lead to uneven fragmentation and safety concerns. This differs from a misfire or a dud, which are about the charge failing to detonate after initiation rather than about how much of the hole actually contains explosive. Unexploded is not the standard term used to describe a partially loaded hole, so bootleg is the correct concept for the situation described.

In blasting terminology, bootleg describes a borehole that is not fully charged with explosive, leaving a portion of the hole without explosive. This loading defect means part of the hole is inert, which changes how the blast energy is released and can lead to uneven fragmentation and safety concerns. This differs from a misfire or a dud, which are about the charge failing to detonate after initiation rather than about how much of the hole actually contains explosive. Unexploded is not the standard term used to describe a partially loaded hole, so bootleg is the correct concept for the situation described.

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