大規模地下空洞における効率的掘削システムの提案とその適用

抄録

The establishment of the efficient excavation system on the large rock cavem is an important subject in consideration of the enlargement and the big depth of the large rock cavern. In the Okutataragi underground power station, when rock conditions were good at the time of the bench excavation, we increased the efficiency of the excavation by adopting a large section blasting. This paper introduces the judgment of rock conditions to excavate a large section and blasting technology consisting of NONEL detonator and ANFO explosive. By studying an actual application of the proposed system, the paper discusses its impacts on the improvement of the excavation efficiency