Which statement best explains why the highwall screen must permit workers to keep the highwall in view at all times?

Which statement best explains why the highwall screen must permit workers to keep the highwall in view at all times?

• A. To monitor rockfall and wall movement
• B. To improve drilling speed
• C. To enhance ventilation
• D. To reduce noise

Answer: (A)

Continuously watching the highwall is essential because it lets workers detect hazards as soon as they appear. If the highwall is kept in view, signs of instability—such as new cracks, shifting material, or rockfalls—can be noticed immediately, allowing workers to stop work, retreat, or have mine management take preventive actions before a fall occurs. This real-time visibility directly supports safety by enabling rapid response to changing conditions on the face. Drilling speed, ventilation, and noise control aren’t about spotting unstable rock or early movement, so they’re not addressed by keeping the wall in view.

Continuously watching the highwall is essential because it lets workers detect hazards as soon as they appear. If the highwall is kept in view, signs of instability—such as new cracks, shifting material, or rockfalls—can be noticed immediately, allowing workers to stop work, retreat, or have mine management take preventive actions before a fall occurs. This real-time visibility directly supports safety by enabling rapid response to changing conditions on the face. Drilling speed, ventilation, and noise control aren’t about spotting unstable rock or early movement, so they’re not addressed by keeping the wall in view.