Excavation of tunnel using a roadheader! A roadheader is a heavy construction machine used to excavate tunnels, typically in mining or civil engineering projects. It's equipped with a rotating cutting head that's able to move across the tunnel face, cutting and excavating the rock or soil. You can learn all tunnelling methods in our online Tunnel Engineering course. This is a great course if you want to succeed in your tunnelling career as a Tunnel Engineer. It give you practical knowledge to be