Blasting·
How the charge is calculated in blasting
What the charge weight depends on, and what a powder factor is.
The charge weight is chosen for the rock and the fragmentation needed — not by guesswork.
What is considered
- Rock strength and fracturing
- Hole pattern and diameter
- Required fragment size
- Vibration limits
The powder factor is the amount of explosive per cubic metre of rock; it is set to reach the fragmentation needed at a controlled level.
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