KJ311 Double Heavy-Duty Rail Two-Arm Tunneling Jumbo

KJ311 double heavy-duty feed rail tunneling jumbo is customized for high-intensity tunneling based on standard KJ311. The core upgraded double cross feed rail adopts multi-point uniform load and preload structure to eliminate running clearance, realizing stable vibration-free hard rock drilling with higher hole precision and longer wear-resistant rail life, greatly reducing underground rail replacement frequency. It fully retains 360° full-range dual booms, 4WD articulated chassis, remote man-machine separation intelligent system and full mining explosion-proof protection. Balancing wide working area, off-road capacity and long continuous drilling performance, it is the optimal equipment for high-frequency cyclic tunneling of overseas granite/basalt hard rock mines and long traffic tunnels.

Double cross heavy-duty feed rail with upper & lower V-type raceway multi-point load, doubling overall drilling rigidity
Factory preloaded zero-clearance slide eliminates resonance vibration during hard rock drilling, controlling blast hole deviation ≤0.5° for regular blasting contour
Carburized alloy rail surface resists rock dust and gravel erosion, extending service life by 60% compared with single-layer rails
360° independent full-range rotatable dual booms fully cover roadway roof, walls and face, reducing frequent machine relocation
17kW high-frequency hard rock drill cooperates with high thrust feed from double rails to greatly improve drilling efficiency on dense hard rock
4WD articulated chassis with 3m minimum turning radius and 24° maximum gradient, flexible travel on complex underground terrain
3D intelligent positioning + auto anti-jamming + fault self-diagnosis + remote data monitoring, cutting downtime loss under hard rock conditions
Dual local & wireless remote control realizes man-machine separation to avoid underground rock fall and gas safety risks
Expanded large-flow high-pressure hydraulic system with energy accumulator pressure stabilization, no pressure attenuation during long-time hard rock impact feed
Mining Ex explosion-proof + IP65 multi-layer seal protection against dust, water and rock debris, suitable for high-dust high-risk underground environments
Independent modular rail assembly for separate disassembly & replacement, saving maintenance time and cost in overseas mines
Reinforced thickened body bears longitudinal impact load from double rails, resisting deformation & crack after long cyclic construction