How the propulsion beam is customized
Beam length
Adjusted to match tunnel section size and drilling depth (e.g. short beams for small headings, long beams for large tunnels or long-hole drilling).
Drilling coverage
Customized to fully cover the tunnel face (crown, walls, and invert) without frequent repositioning.
Tunnel cross-section
Suitable for different tunnel sizes such as small mine tunnels, railway tunnels, hydropower tunnels, or road tunnels.
Rock support requirements
Can be matched with rock bolt length and drilling angle for systematic bolting.
Typical examples
Small tunnels (e.g. 3×3 m): shorter propulsion beams for compact jumbos
Medium tunnels (e.g. 5×5 m to 7×6 m): standard beams around 4.5–5.9 m
Large tunnels and caverns: extended beams (6 m or more) or telescopic beams
Benefits of customization
Higher drilling efficiency
Better hole accuracy and straightness
Reduced machine repositioning
Improved safety and adaptability to site conditions
If you want, you can tell me the tunnel size, drilling depth, and application (excavation or bolting), and I can recommend a suitable propulsion beam configuration for your project.
