Hydraulic Tunneling Drilling Rig, KJ321

Hydraulic Tunneling Drilling Rig, KJ321
Hydraulic Tunneling Drilling Rig, KJ321
Hydraulic Tunneling Drilling Rig, KJ321
Hydraulic Tunneling Drilling Rig, KJ321
Hydraulic Tunneling Drilling Rig, KJ321
Hydraulic Tunneling Drilling Rig, KJ321
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Two-boom face drilling rig

  • Dimensions (L×W×H): 12000×1750×2000/3000mm
  • Weight: Approx.12000kg
  • Maximum gradeability: 25%(14°)
  • Range of cross section: 12-44m²

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.

Video Show
Structure Diagram
Technical Specifications
Dimensions and weight
Length 12000mm
Width 2160mm
Height 2500/3300mm
Weight Approx. 22000kg
Tramming speed on flat ground 10km/h
Maximum gradeability 25%(14°)
Safety protection
Noise level < 100dB(A)
Lifting safety roof Meet the requirements of FOPS and ROPS
Air and water system
Air compressor 1×JN11 Oil consumption of lubrication 2×180-250g/h
Capacity of air compressor 1.52m3/min
Pressure 8bar Water pump 1×CR3 1×CR5
Shank lubrication device Electronic pulse lubrication pump Power 1.5kW 7.5kW
Air consumption of lubrication 2×0.3m3/min Capacity of water pump 3m³/h 10m3/h
Chassis
Diesel engine CumminsQSB3.9-C125 93kW/2200rpm Tires 11.00-20
Exhaust purification Exhaust catalyzer Steering mechanism Articulated steering angle: ±40°
Drive system Closed hydraulic system for four-wheel driving Travelling braking Two-circuit hydraulic brake
Swing angle Swing of rear axle: ±10° Parking braking Wet multi-disc brake of reducer
Fuel tank 60L
Drilling system
Rock drill (drifter) 2×HC50/R38 2×HC95LM/R38
Impact power 13kW 24kW
Impact flow 105L/min 100-120L/min
Impact pressure 130bar 180-200bar
Maximum rotary pressure 150bar 210bar
Impact frequency 62Hz 62Hz
Torque 325Nm 764Nm
Hole diameter Ø32-76mm Ø42-102mm
Beam rotation 360°
Feed extension 1600mm
Model of drill boom K26F
Form of drill boom Automatic parallelism
Boom extension 1200mm
Electric hydraulic power unit
Motor 45kW 75kW
Impact/Feed/Positioning Variable displacement axial piston pump
Rotation Gear pump
Filter fineness 10µ
Hydraulic oil tank 240L
Hydraulic cooler Water cooler
Working voltage 380V
Frequency 50Hz
Starting method Star/delta
Cable reel 1×F440
Length of reel cabling 100m 80m
Cable specifications 3×35 3G6 3×50 3G6
Features
  • 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;
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