Research Article

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

Table 1

Uniaxial compressive strength and axial strain of granites.

Sample no.UCS (MPa)Average UCS (MPa)Axial failure strainAverage axial failure strain

DY1117.21114.010.00530.0055
DY2112.410.0057
DY3123.670.0061
DY4102.720.0048