Hydraulic Tunneling Drilling Rig, KJ321

Two-boom face drilling rig

This hydraulic tunneling drilling rig is a face drilling rig designed with increased working height, suitable for large hard rock mines and tunnels with cross sections of 12-44m². The drilling rig can reach a height of 7.4m from floor level, and a width of up to 7.6m.

• This two-boom face drilling rig is equipped with two independently controlled drilling systems which enable a higher working efficiency and larger drilling range; It is suitable for drilling vertical, inclined and horizontal holes in hard rock mines and tunnels with cross sections of 12-45m²;
• The hydraulic tunneling drilling rig is configured with medium/low pressure hydraulic drifters from Montabert. Hydraulic hoses and seals do not operate in high pressure conditions since the hydraulic drifter works under low oil pressure, thus resulting in prolonged service life, high reliability and less maintenance cost when compared to high pressure hydraulic drifter;
• The rock drill (drifter) uses stepped piston, which improves the efficiency of impact energy transfer from drill to rock, increases drilling speed, lowers the consumption of drilling tools while keeping the drill rig in good condition;
• Independently designed drilling rig boom uses Cartesian coordinate action principle to enable quick and simple drilling positioning since it can achieve that the feed beam is automatically parallel to the origin position; The robust drill boom offers optimum shaped coverage, with no blind spot for drilling holes, the boom can also execute cross-cut drilling and bolt hole drilling operations;
• Low-emission Cummins diesel engine paired with hydraulic four-wheel-drive transmission system is included in the two-boom face drilling rig, achieving stepless speed adjustment, high gradeability and fast walking speed;
• The exhaust purification device is equipped to greatly improve the underground working environment;
• Dual-circuit wet multi-disc service brake and multi-pad parking brake provide safe braking and high stability; In addition, emergency stop buttons at multiple points significantly enhance the safety during underground mining and tunneling operations;
• The spacious operating environment, lifting protective roof and considerably designed automatic functions of the low profile drill rig allow the operator to focus on drilling safely, quickly and accurately;
• Optimal layout of the drilling rig enables operator has a good visibility, and all parts at service points are securely protected, and accessible for easy maintenance;
• The compact structure of the tunneling jumbo makes steering more flexible, the powerful articulated chassis allows for steering angle of ±40° and rear axle swing angle of ±10°, enabling the drilling rig to easily pass through tunnels with a minimum width of 2.5m, and safely achieve right angle turns in a 3.5m wide tunnel;
• KJ321 hydraulic tunneling drilling rig is equipped with the original power control valve block from Montabert, France, enabling it to feature automatic impact pressure adjustment, and anti-jamming function. This ensures smooth and accurate hole drilling during the operation.
• The hydraulic drilling rig adopts auto-stop device and bottom hole debris clearing function, automatically stopping pushing and impacting after finishing the drilling process. The handle control can be used to blow out residue at the bottom of the hole, reducing operation cycle time.
• Kaishan brand energy-saving integrated direct-connected screw air compressor is equipped in the drilling equipment, offering smooth operation, easy maintenance, significantly saved energy and reduced pollution.