DEVELOPMENT OF TOTAL BLASTING SYSTEM“DMEC”FOR TUNNEL EXCAVATION

Abstract

The total blasting system “DMEC” is the system to provide accurate locations of drill holes with laser beams. The database of past performance including hole numbers, drill hole length, explosive charge etc., is used in this system to design the optimum blasting pattern suiting various geological features and tunnel sections. The design result is transferred to the laser marking system and the drill hole locations are lit up continuously on the tunnel face with laser beam.
The system significantly contributes to the reduction of overexcavation, the saving of manual work and the improvement of safety on site.