Numerical Simulation of Blast Vibration and Crack Forming Effect of Rock-Anchored Beam Excavation in Deep Underground Caverns

Table 6

The damage depth, area of surrounding rocks, and the crushing rate of excavated rock mass.

Crustal stress/MPa	0	5	10	20	40	80
Damage depth of surrounding rocks/cm	>50	>50	≈20	≈10	<10	≈10
Damage area of surrounding rocks/%	>50	>50	≈40	≈20	<20	≈6.7
Crushing rate of excavated rock mass/%	>75	>70	>70	>50	<30	<10