Tunnel Jumbo Drilling Rig Construction
In large-scale tunneling projects, heavy-duty tunnel jumbos are deployed to execute high-efficiency drilling operations. These drilling rig, equipped with multiple robotic booms and high-torque drilling systems, are designed to bore blast holes, rock anchor holes, or ventilation channels across extensive tunnel sections. 
For mega-tunnels, synchronized jumbo fleets work in tandem to accelerate progress, minimizing downtime and adapting dynamically to complex rock formations. Post-drilling, explosives or reinforcement materials are strategically installed to enable controlled excavation and long-term structural stability.

Underground Jumbo Drilling Rig Machine Rotary Drilling Operation
An underground drilling rig performs rotary drilling operations by utilizing high-torque rotational force to penetrate subsurface layers. The rig's powered rotary head drives a drill string equipped with specialized cutting bits, which grind through soil, rock, or other geological formations. During the process, drilling fluid is injected through the hollow drill pipe to cool the bit, remove cuttings, and stabilize the borehole wall. The auger drill rod simultaneously transmits rotational energy downward while conveying excavated material upward through its helical flights. This mechanized process enables precise vertical/horizontal boring for applications including foundation piling, tunnel construction, utility installation, and mineral exploration. Modern rigs incorporate computerized monitoring systems to optimize rotational speed, feed pressure, and alignment control, ensuring operational efficiency while minimizing ground disturbance in urban or environmentally sensitive areas.

SANROCK SRJ18 Underground Jumbo Drilling Rig Scope of application One-boom face drilling rig for medium sized underground drifts,
with coverage area 7-35m2. 
Main benefits
Optimized: for small to medium size tunnels and drifts down to 2.4 m widex2.9 m high,
up to 6 m widex6 m high. 
Economical and efficient: with automatic drilling, automatic return and anti-jamming functions increased the service life of drilling tools. 
Intelligent: with function of real-time monitoring and evaluation of construction conditions by digital recording data of the number and depth of holes.
Safe and simple operation: equipped with automatic diagnosis and voice alarm system. High popularity: and good after-sales service support.