This Atlas Copco H104 was modified to suit civil construction sites and tunnels where electric power is not available. The machine retains the diesel engine for tramming the machine independently to various locations but has a pneumatic motor for operating the hydraulic drill and boom allowing flexibility in areas without electrical supply. The hydraulic tunneling and mining rig has a single BUT 4 boom and a Montabert HC20 rock drill for drilling narrow tunnel cross sections. It is able to drill roof/floor/side/forward in soft and hard rock.

https://www.youtube.com/watch?v=bsRiohqw3n0