Numerical Study on the Mechanism and Application of Artificial Free Surfaces in Bedrock Blasting of Shield Tunnels

Table 9

Correlated parameters of the soil.

Name	(cm^3)	(MPa)
Plain fill	1.8	20	0.26
Medium sand	2.05	37	0.25
Silty clay	1.95	15	0.35
Coarse sand	1.95	40	0.27
Gravelly sand	1.9	33	0.31