Drifting and Blasting Design for Shijianling Tunnel

Abstract:

The problems in the blasting of the short terrace tunneling in Shijianling Tunnel are analyzed.Awhole section tunneling blasting scheme is proposed on condition that the simple self- made drilling platform hasbeen used for whole section tunneling,Rational and available smooth blasting parameters are determined by thedesign of engineering analogy and field practice. Also discussed ls the method of millisecond relay ignition bynonelectric millisecond detonation outside holes so as to increase the number of the relays of detonators in tunnel-mg.