山岳トンネル(12)

[VI-447] Development of a system to reduce the risk of rock fall disasters by focusing on the factor that cause rock falls

〇Daichi Tamura¹, Hisashi Hayashi¹, Koichi Aoki², Masato Shinji¹ (1.Yamaguchi university , 2.Kumagai Gumi)

Keywords:Tunnel, Rock fall, Occupational safety, Photogrammetry