What is the appropriate action to take with downlines when preparing for a blast under imminent lightning conditions?

• A. Leave them as they are
• B. Bury them with stemming or cuttings
• C. Remove all downlines
• D. Pin them down securely

Answer: (B)

When preparing for a blast under imminent lightning conditions, burying downlines with stemming or cuttings is essential to mitigate the risk associated with lightning strikes. This action provides a physical barrier to protect sensitive downlines, which can carry current if struck by lightning. Burying the lines helps to ensure that they are not exposed and reduces the likelihood of accidental detonation due to electrical surges caused by lightning.

By utilizing stemming or cuttings as protective materials, the risk of a blast becoming uncontrolled during such weather conditions is significantly minimized. This practice aligns with safety protocols that prioritize the well-being of personnel and the integrity of the blasting operation in potentially dangerous weather conditions.