Effect Blasting Excavation of Yujiapeng tunnel on Stability of nearby Giant dangerous rock Masses (DRM)

摘要

On the basis of the interpretation of engineering geology of the tunnel and of its adjacent dangerous rock masses (DRM), this paper presents the energy ad vibration parameters of the explosion that propagates in different blasting modes according to the experimental formulas now usually employed. Then the stability checking computation of T_8-T_12 area, the most dangerous area of DRM, is conduc- Ted under the limited blasting condition and with the limited equilibrium method. The results shows that The effect on the stability is only 5.5/100 and that this area also contains certain safety reserves.