Rectification time for 80% of Return Roadways after stonedust application?

• A. 24 hours
• B. 3 days
• C. 7 days
• D. 14 days

Answer: (C)

Rectification time after stonedust application is about how quickly you must bring the Return Roadways up to the required dust-control standard. When stonedust is applied, the goal is to achieve effective dust suppression on the roadways that carry return air, reducing both inhalation hazards and explosion risk. The rule that 80% of Return Roadways must be rectified within seven days sets a practical, safety-focused deadline: most of the roadways should reach the standard within about a week, so exposure is minimized and operations stay on a workable schedule. Shorter times, like 24 hours, are often not feasible for thorough dusting and verification across all affected sections. A longer window, such as 14 days, would leave too much time with substandard dust control. Seven days strikes a balance between timely protection and the realities of mine operations. If 80% are not up to standard within that period, planning and escalation typically occur to address the remaining roadways promptly.