During blasting operations, which action helps manage nuisance vibrations?

During blasting operations, which action helps manage nuisance vibrations?

• A. Increase the blast size.
• B. Ignore vibrations if few people are nearby.
• C. Re-entry immediately after blast.
• D. Monitor for nuisance vibrations and maintain waiting periods before re-entry.

Answer: (D)

The action tested is about controlling nuisance vibrations by using measurement and timing to keep people and nearby property safe. By monitoring vibration levels with appropriate instruments and sticking to predetermined waiting periods before re-entry, you let the ground motion decay to acceptable levels before anyone comes back into the blast area. This approach directly reduces disturbance and safety risks, and aligns with regulatory and blast management practices. Increasing blast size would produce more, not less, vibration, so it worsens nuisance. Ignoring vibrations when people might be nearby is unsafe and non-compliant. Re-entering immediately after a blast doesn’t allow vibrations to subside, increasing risk.

The action tested is about controlling nuisance vibrations by using measurement and timing to keep people and nearby property safe. By monitoring vibration levels with appropriate instruments and sticking to predetermined waiting periods before re-entry, you let the ground motion decay to acceptable levels before anyone comes back into the blast area. This approach directly reduces disturbance and safety risks, and aligns with regulatory and blast management practices.

Increasing blast size would produce more, not less, vibration, so it worsens nuisance. Ignoring vibrations when people might be nearby is unsafe and non-compliant. Re-entering immediately after a blast doesn’t allow vibrations to subside, increasing risk.