DEVELOPMENT AND DEMONSTRATION TEST OF LOW-COHESION EXPLOSIVE FOR TUNNEL EXCAVATION

Abstract

A Low-Cohesion (Bulk Emulsion) Explosive complying to relevant laws and regulation in Japan is developed. Demonstration tests are carried out to prove its facility for handling and its blasting performance in actual construction site. Several useful-results were obtained from the tests, in relation to, 1) mechanical charge of explosion, 2) compact charge, 3) water-resisting qualities, 4) large burden-distance for blastholes, 5) reduction of charge-time and so on.