What precaution should be taken after stemming a wet hole?

• A. Ignore the condition of the hole
• B. Wait a few hours before checking
• C. Check and re-stem if subsidence occurs
• D. Only check if there are signs of flyrock

Answer: (C)

After stemming a wet hole, it is important to check and re-stem if subsidence occurs because the integrity of the hole can be compromised due to the moisture. In wet conditions, the stemming material can be less effective in containing the explosive charges and preventing them from displacing. If subsidence happens, it indicates that the stemming may not have held properly, which could lead to a dangerous situation. Checking the hole allows for necessary adjustments to be made to ensure safety and effectiveness in the blasting operation. By being proactive in monitoring the condition of the hole, potential hazards can be mitigated, ensuring a safer work environment.