How does a Deputy ensure the adequacy of roof support in underground operations during shifts?

• A. Remove some supports to speed up drilling.
• B. Never inspect during shift changes.
• C. Check that rock bolts or roof supports are in place, inspect for signs of movement, ensure monitoring devices are functioning, and escalate if deficiencies are found.
• D. Rely solely on mine plan drawings.

Answer: (C)

Maintaining roof stability on shift comes from actively confirming that the supports are doing their job and that conditions are safe to work in. The right approach is to verify that the roof supports are in place and intact, look for any signs of movement or deformation in the rock or supports, make sure monitoring devices are working and giving valid readings, and escalate any deficiencies so the situation can be corrected promptly. This means checking rock bolts, mesh, and other supports, watching for cracks, bolt loosening, or ceiling spalling, and confirming that alarms or meters are functioning and calibrated. If anything unusual is found, raise it with the supervisor or engineer, implement interim controls if required, and arrange for additional support or repairs. This hands-on, real-time verification during shifts ensures ongoing safety for workers and equipment, and provides a clear line of action if conditions change.

Options that involve removing supports, avoiding inspections during shift changes, or relying only on mine plan drawings fail to address the reality underground, where conditions can differ from plans and deteriorate over time.