A STUDY OF LOOSENING BLASTING ON THE ROCK CAVERN FOR EFFICIENT EXCAVATION

Abstract

  On the large rock cavern of underground power station, LPG underground storage, and radioactive waste disposal, the large section bench blasting is a construction method for efficient excavation. However, it is limited to the rock conditions. On the other hand, the loosening blasting increased the efficiency of the excavation on the bench blasting of mine. By studying an actual application of the loosening blasting in the Omarugawa underground power station, this paper presents applicable conditions for the loosening blasting and its effects on blasting efficiency.