Blast mitigation by water in a bag on a tunnel floor Tomotaka Homae, Yuta Sugiyama, Kei Shimura, Kunihiko Wakabayashi, Tomoharu Matsumura and Yoshio Nakayama MATEC Web Conf., 192 (2018) 02039 Published online: 14 August 2018 DOI: 10.1051/matecconf/201819202039