When can a person enter or remain UG after the mine or part has been sealed?

• A. Only with inspectors written consent
• B. After 24 hours
• C. Never
• D. With supervisor approval

Answer: (A)

When a mine or part has been sealed, entering or remaining underground is only allowed with the inspector’s written consent. Sealing creates hazards such as confined atmosphere, gas buildup, or stability issues, so entry is tightly controlled and requires formal authorization from the regulator. That written consent comes with specific conditions—who can enter, what safety equipment and monitoring are required, how long entry can last, and what rescue or emergency arrangements must be in place. This ensures proper risk assessment and regulatory oversight before anyone goes back into a sealed area. Time elapsed after sealing, or approval from a supervisor alone, does not substitute for this formal consent, and entry is not categorically prohibited forever; it simply must be authorized in writing by the inspector.