Hydraulic Tunneling Drilling Rig, KJ421
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Two-boom face drilling rig
- Dimensions (L×W×H): 13000×2200×2400/3100mm
- Weight: Approx. 22000kg
- Maximum gradeability: 25%(14°)
- Range of cross section: 16-68m²
KJ421 hydraulic tunneling drilling rig is a two-boom jumbo designed for drilling vertical, inclined and horizontal blast holes and bolt holes. It is ideal for use in mining and tunneling applications with cross sections from 16m² to 68m².
Video Show| Dimensions and weight | ||||
| Length | 13000mm | |||
| Width | 2200mm | |||
| Height | 2400/3100mm | |||
| 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 | 1.55m/min | |||
| Pressure | 8bar | Water pump | 1×CRI10-22 | |
| Air consumption of lubrication | 2×0.3m/min | Power | 7.5kW | |
| Capacity of water pump | 10m³/h | |||
| Chassis | ||||
| Diesel engine | Cummins QSB3.9-C125 /93kW/2200rpm | Travelling braking | Wet type brake | |
| Exhaust purification | Exhaust catalyzer | Parking braking | Mechanical brake | |
| Drive system | Hydraulic torque converter gearbox | Fuel tank | 120L | |
| Drilling system | ||||
| Rock drill (drifter) | 2×HC95LM | |||
| Impact power | 21kW | |||
| Impact flow | 100-120L/min | |||
| Impact pressure | 180-200bar | |||
| Impact frequency | 54-62Hz | |||
| Torque | 764Nm | |||
| Beam rotation | 360° | |||
| Feed extension | 1600mm | |||
| Model of drill boom | K40 | |||
| Form of drill boom | Automatic parallelism | |||
| Boom extension | 1800mm | |||
| Electric hydraulic power unit | ||||
| Motor | 2×75kW Three-phase motor | |||
| Impact/Feed/Positioning | Variable displacement axial piston pump | |||
| Rotation | Gear pump | |||
| Filter fineness | 10µ | |||
| Hydraulic oil tank | 400L | |||
| Hydraulic cooler | Air cooler | |||
| Working voltage | 380V | |||
| Frequency | 50Hz | |||
| Starting method | Star/delta | |||
| Cable reel | 1×CRC1016 | |||
| Length of reel cabling | 100m | |||
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