Table 3 Classification of shockwave - induced underground equipment damage.
Structural type | Failure characteristics | Overpressure (P/kPa) |
|---|---|---|
Wooden beam with a diameter of approximately 15 cm | Deformation | 100 < P < 130 |
Brick wall with a thickness of 24–36 cm | Failure | 140 < P < 210 |
Air duct | Severe deformation, breakage | 150 < P < 350 |
Electric wire | Breakage | 350 < P < 420 |
Winch and fan with a tonnage of 1 t | Displacement, overturning | 400 < P < 600 |
Concrete wall with a thickness of 24–36 cm | Generation of cracks, deformation | 490 < P < 560 |
