SAFETY DEVICE FOR TUNNEL CONSTRUCTION AND TUNNEL CONSTRUCTION METHOD

To provide a safety device for tunnel construction and a tunnel construction method capable of improving the safety of powder charging work by an operator adjacent to a pit face.SOLUTION: A tunnel construction method includes steps of: a drilling step (S1) for drilling a plurality of bar body insertion holes (2) (first holes) and a plurality of blast holes 3 (second holes); a bar body installation step (S2) for inserting a front side (one side) 11 of a bar body 10 into each of the plurality of bar body insertion holes 2; a net-like member installation step (S3) for hanging a net-like member 20 across rear sides 12 (other sides) of the bar bodies 10; and a loading step (S4) for charging an explosive into each of the plurality of blast holes 3.SELECTED DRAWING: Figure 1 【課題】作業員による切羽近傍での装薬作業の安全性を向上させる。【解決手段】トンネルの施工方法は、切羽１に複数の棒体挿入孔２（第１の孔）と複数の発破孔３（第２の孔）とを削孔する削孔工程（Ｓ１）と、複数の棒体挿入孔２の各々に棒体１０の前側１１（一側）を挿入する棒体設置工程（Ｓ２）と、棒体１０の後側１２（他側）間に網状部材２０を掛け渡す網状部材設置工程（Ｓ３）と、複数の発破孔３の各々に爆薬を装填する装薬工程（Ｓ４）と、を含む。【選択図】図１