Effect of Blasting During Tunnel Excavation on an Existing Adjacent Tunnel

In recent decades, the effects of blast loads on existing structures have gained considerable attention due to increase in threat from various activities. Site-specific empirical relationships for calculation blast-induced vibration parameters like Peak Particle Velocity (PPV), Acceleration (PPA), and Displacement (PPD) are commonly used estimation impact blasting an adjacent tunnel. However, these not able consider variation rock uncertainty situ conditions such as modern mass classifications (i.e., RMR, Q-system, RQD)... this paper, a published data researchers different sites at Croix-Rousse tunnel France been collected propose generalized regression model PPV by considering Rock Mass Rating (RMR) system, damping ratio “”, Dynamic Young’s modulus “Ed”. By using numerical analysis method, proposed (Empirical Formula) function variable multivariate can be directly prediction vibrations rocks.