What does 'actual distance' refer to in blasting operations?

In blasting operations, 'actual distance' refers specifically to the distance measured from the blast site to any public or private structure. This measurement is crucial for ensuring safety and compliance with regulations, as it helps determine the potential effects of the blast on surrounding infrastructure. By knowing the actual distance, blast operators can assess risk factors, such as flyrock, ground vibration, and air overpressure that may affect nearby buildings, roads, or other sensitive areas. This understanding is vital for planning the blast effectively, minimizing hazards, and adhering to safety standards during the operation. The focus on public or private structures emphasizes the responsibility of blast operators to protect both people and property during blasting activities.