Core Functions in HSR Tunnel Construction
Its primary job is to drill blast holes for the "Drill & Blast" (D&B) method, which is still widely used for long, hard rock tunnels common in HSR projects, especially through mountains.
Drilling the Blast Pattern: The operator uses a pre-designed drill pattern (a specific arrangement of holes on the tunnel face). The jumbo's advanced positioning system guides the booms to drill holes to exact depths and angles.
Installing Rock Bolts: After blasting and mucking out the broken rock, the same machine is often used to drill holes for rock bolts and other support elements to stabilize the newly exposed tunnel roof and walls.
The curved booms are perfect for reaching various points on the tunnel arch.
The double curved-boom drilling jumbo is more than just a drill; it's a productivity, precision, and safety multiplier. For high-speed rail tunnels-where size, speed of construction, and perfect geometry are non-negotiable-this machine is a cornerstone of modern, efficient, and safe tunnel excavation. It transforms the chaotic process of rock blasting into a controlled, computerized, and rapid operation.
