Effect of Fissure Penetration Degrees on Spalling Process and Feature of Surrounding Rock in Rectangular Tunnel Under True Triaxial Loading
To investigate the effect of fissure penetration on the spalling process and features of rectangular tunnel sidewalls, true triaxial compression tests were conducted on cubic sandstone specimens with varying fissure penetration degrees.Acoustic click here emission monitoring and video equipment were used to record the failure process of the surroun