Which notices must be given to an inspector?

• A. Hot work outside of a permanent U/G workshop
• B. Before second workings are started (or a significant change to SOP)
• C. Prior to sealing a mine or part of
• D. All of the above

Answer: (D)

Notices are required whenever an operation or change could affect mine safety, especially ventilation and gas management.

Hot work outside a permanent underground workshop needs to be notified so the inspector can verify there are appropriate controls in place—gas testing, ventilation adjustments, and any permits—because heat and sparks can ignite methane or coal dust and pose risks to connected areas.

Starting second workings or making a significant change to the standard operating procedure changes the airflow, gas generation, and overall ventilation needs. The inspector must review and approve these changes to ensure the ventilation plan remains adequate and safety controls are maintained.

Sealing a mine or part of it alters gas pressures, air leakage paths, and emergency planning. Notifying the inspector ensures the sealing process is properly supervised and that all necessary safety and ventilation considerations are addressed.

Since each of these scenarios involves potential safety impacts, all of them require notice to the inspector.