Method and system for blast-induced vibration monitoring of tunnels in high asymmetric in-situ stresses

A method for a blast-induced vibration monitoring of a tunnel in high asymmetric in-situ stresses, comprising:

• fixing triaxial vibration sensors respectively in areas having different radial depths inside surrounding rocks of a stress concentration area behind a tunnel face of the tunnel in high asymmetric in-situ stresses;
• and
• monitoring blast vibration velocity and acceleration by each triaxial vibration sensor at a position thereof,
• wherein the different radial depths are depths at three places of surface layers, inward surface layers and deeper layers inside the surrounding rocks of the stress concentration area;
• and
• wherein based on geological data of the surrounding rocks of the tunnel in high asymmetric in-situ stresses, a position of the stress concentration area of a cross section behind the tunnel face of the tunnel in high asymmetric in-situ stresses and the different radial depths inside the surrounding rocks of the stress concentration area are determined according to a geostress distribution of asymmetric virgin rocks and geometric characteristics of the cross section of the tunnel in high asymmetric in-situ stresses.