Site investigation · Geophysics & monitoring
Blast vibration (scaled distance) calculator
Peak particle velocity from charge per delay and distance, and the maximum charge per delay for a PPV limit.
Standard: Scaled distance PPV = K (D/√W)^−β · AS 2187.2 limits (input)
Open the live calculator → All site investigation calculators
Inputs in the worked example
The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.
| Input | Value | Unit |
|---|---|---|
| Charge mass per delay | 25 | kg |
| Distance | 150 | m |
| Site constant K | 1140 | |
| Attenuation β | 1.6 | |
| PPV limit | 10 | mm/s |
Worked example — results
| Result | Value | Unit |
|---|---|---|
| Scaled distance D/√W | 30.00 | m/kg^½ |
| PPV | 4.94 | mm/s |
| Max charge for limit | 60.40 | kg |
- ✓ PPV ≤ limit
Method, formulas and assumptions
- Scaled distance D/√W = 150/SQRT(25) = 30 m/kg^½
- PPV = 1140*30^(-1.6) = 4.9375 mm/s
- Max charge for limit = (150/(1140/10)^(1/1.6))^2 = 60.402 kg
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For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.