Kaishan Underground Drilling Rigs/Underground Tunnelling (Development) Drilling Rigs
KJ311
KJ311 is a hydraulic tunnelling drilling rig for hard-rock mine roadway driving in sections of 12-35 m². It can drill lateral cross-cut and rock-bolting holes; optional versions cover a 7.6 × 7.4 m section and 2.2 m rock bolts at 4 m height.
Dimensions & weight — Overall dimensions (L × W × H)
11500 × 1750 × (2000/3000) mm
Dimensions & weight — Weight
approx. 12000 kg
Dimensions & weight — Tramming speed on flat ground
10 km/h
Dimensions & weight — Maximum climbing capacity
25% (14°)
Overview
KJ311 is a hydraulic tunnelling drilling rig for hard-rock mine roadway driving in sections of 12-35 m². It can drill lateral cross-cut and rock-bolting holes; optional versions cover a 7.6 × 7.4 m section and 2.2 m rock bolts at 4 m height.
Key highlights
- ✓The flexible boom provides optical coverage of the section; 360° rotation and a self-levelling beam support drill-hole positioning and cross-cut or rock-bolt drilling.
- ✓Four-wheel drive, articulated steering and a balanced layout support flexible and safe operation in tunnels.
- ✓A high-frequency stepped-piston rock drill improves impact-wave transmission and drilling performance.
- ✓The spacious layout and automatic functions help the operator position and drill holes accurately.
- ✓Key components are protected and arranged for straightforward maintenance.
Applications: Hard-rock mine roadway driving in sections of 12-35 m². · Optional large-tunnel version with a maximum working section of 7.6 × 7.4 m (W × H). · Optional rock-bolt version for 2.2 m-deep rock bolts in a 4 m-high tunnel.
Specifications
Request the current specification sheet for this model using the button above.
Dimensions & weight
| Overall dimensions (L × W × H) | 11500 × 1750 × (2000/3000) mm |
| Weight | approx. 12000 kg |
| Tramming speed on flat ground | 10 km/h |
| Maximum climbing capacity | 25% (14°) |
Other specifications
| Noise level | < 100 dB(A) |
| Lifting safety roof | FOPS & ROPS certified |
Tooling & air
| Air compressor | DLGF 0.7/8-5.5(B); capacity 0.7 m³/min; pressure 6-8 bar |
| Shank lubrication | Electronic pulse lubrication pump; oil 180-250 g/h; air 0.3 m³/min |
| Water pump | Power 1.5 kW / 4 kW; capacity 3 m³/h / 5.8 m³/h |
Drive & handling
| Diesel engine | Cummins B3.9CS4-80C, 59 kW / 2500 rpm |
| Drive system | Closed hydraulic system for four-wheel driving |
| Swing angle of rear axle | ±10° |
| Steering mechanism | Articulated steering, ±40° |
| Travelling braking | Two-circuit hydraulic brake |
| Parking braking | Wet multidisc brake of reducer |
| Fuel tank | 60 L |
Drilling capability
| Rock drill configurations | HC50: 13 kW, 62 Hz, Φ32-76 mm; 18U: 18 kW, 57 Hz, Φ42-89 mm; HC95LMH/22U: 21/22 kW, 62/53 Hz, Φ42-102 mm; drill capacity: 0.8 / 1.1 m/min |
| Beam rotation | 360° |
| Feed extension | 1600 mm |
| Model of drill boom | K 26F |
| Form of drill boom | Self-leveling |
| Boom extension | 1200 mm |
Engine & drive
| Electric motor (power unit) | 45 kW / 55 kW / 75 kW |
| Impact / feed / positioning pump | Axial variable displacement piston pump |
| Rotation pump | Gear pump |
| Filter fineness | 10 μm |
| Hydraulic oil tank | 240 L |
| Hydraulic cooler | Water cooler |
| Working voltage | 380 V |
| Frequency | 50 Hz |
| Starting method | Star-triangle |
| Cable specifications | 3×35+3G6 / 3×50+3G10 |
Other specifications
| Optional large-tunnel version | Maximum working section 7.6 × 7.4 m (W × H) |
| Optional rock-bolt version | 2.2 m-deep rock bolts in a 4 m-high tunnel |
| Optional equipment: auxiliary cab | Provides safe protection and a comfortable working environment |
Drilling capability
| Rod size | R38 / T38 |
Other specifications
| Tunnel working range | 12-35 m² |
Applications
- Underground mining
- Development drilling
- Tunnel face drilling
Recommended packages
Air compressor match
Underground jumbos run on the mine's electric/hydraulic supply — confirm voltage and water/air services at the heading. Where air is needed, match a KSDY electric compressor to the site power.
DTH hammer & bits
Kaishan underground rigs use premium hydraulic rock drills (Montabert HC50/HC95/HC109) for face and production drilling; the KSQ31 DTH model runs K-class hammers. Confirm rock drill model against your tunnel section.
Need a complete drilling package? Request a rig + compressor + tooling quote →
Frequently asked questions
What applications suit the KJ311?
Underground mining, Development drilling, Tunnel face drilling.
Which air compressor pairs with the KJ311?
Underground jumbos run on the mine's electric/hydraulic supply — confirm voltage and water/air services at the heading. Where air is needed, match a KSDY electric compressor to the site power.
Can the equipment be configured to my project?
Send your project details through the inquiry form and we will confirm the available configuration for the selected model before quotation.