Mathematical Problems in Engineering / 2019 / Article / Tab 3

Research Article

Stability Analysis of Underground Multicavities in Bench Blasting Vibration

Table 3

Critical vibration velocity of the wall rock of the grotto[5].

Compressive strength (MPa)Tensile strength 
(MPa)
No damage 
(m/s)
Slight damage 
(m/s)
Intermediate damage (m/s)Serious damage 
(m/s)

Hard rock75–1102.1–3.40.270.540.821.53
110–1803.4–5.10.310.620.961.78
180–2005.1–5.70.360.721.112.09
Soft rock40–1001.1–3.10.290.580.901.67
100–1603.4–4.50.350.701.071.99

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