Key advantages:
Wide working envelope
The double-curved structure allows the drill to reach the tunnel face, crown, sidewalls, and invert without frequent repositioning.
High drilling accuracy
Multiple articulation points provide precise alignment for both blast holes and rock bolt holes.
Excellent bolting capability
Easily handles upward, lateral, and inclined drilling required for systematic rock bolting, forepoling, and pipe roofing.
Improved efficiency
One machine can perform face drilling and support drilling, reducing equipment changes and downtime.
Adaptable to complex tunnel profiles
Effective in circular, horseshoe, and irregular tunnel sections, even in confined spaces.
Typical applications:
Drill-and-blast tunneling
Rock bolt and cable bolt installation
Crown and sidewall support drilling
Hydropower, railway, highway, and mining tunnels
Because of this versatility, single-arm and double-arm rock drilling jumbos with double-curved booms are often selected when projects require both excavation and support drilling with the same machine.
