Kaishan Underground Drilling Rigs/Underground Tunnelling (Development) Drilling Rigs
KJ311
KJ311 Hydraulic Tunnelling Drilling Rig is qualified for hard-rock mine drifting in cross-sections of 12-35m², with a maximum section of 7.6×7.4m (W×H), total weight about 12,000kg. It is equipped with a K26F boom (1,200mm extension) and HC50/18U/HC95LMH/22U rock drills (13-22KW impact power), drilling holes of Φ32-102mm, with 45-75kW electric motors.
Hole diameter
Φ32-76 / Φ42-89 / Φ42-102 mm
Overview
KJ311 Hydraulic Tunnelling Drilling Rig is qualified for hard-rock mine drifting in cross-sections of 12-35m², with a maximum section of 7.6×7.4m (W×H), total weight about 12,000kg. It is equipped with a K26F boom (1,200mm extension) and HC50/18U/HC95LMH/22U rock drills (13-22KW impact power), drilling holes of Φ32-102mm, with 45-75kW electric motors.
Key highlights
- ✓Large-tunnel design: specially designed for large tunnels with maximum section 7.6×7.4m (W×H); specially designed for rock bolts, drilling 2.2m-deep rock bolts in 4m-high tunnels
- ✓Flexible boom: K26F boom with 1,200mm extension, 360° beam rotation and self-leveling for rapid positioning; also usable for lateral cross-cut and rock bolting
- ✓High-frequency rock drill: HC50/18U/HC95LMH/22U, 13-22KW impact power, stepped piston optimizing impact wave transmission for higher drilling speed and lower tool consumption
- ✓Comfort and safety: auxiliary cab provides safe protection and comfortable working environment, FOPS & ROPS certified canopy, four-wheel-drive articulated chassis (±40° steering)
- ✓Power and hydraulics: 45-75kW electric motors, axial variable displacement piston pump + gear pump, 10μ filtration, 380V 50Hz power supply
Applications: Drifting in large-section underground mines, tunnel excavation and rock bolting operations.
Genuine Kaishan equipment supplied through our authorized distribution channel, with configuration, export coordination, spare-parts and after-sales support.
Specifications
Request the current specification sheet for this model using the button above.
Drilling capability
| Hole diameter (mm) | Φ32-76 / Φ42-89 / Φ42-102 |
| Tunnel working range | 12-35 m² section |
Engine & drive
| Chassis engine | Cummins B3.9CS4-80C 59KW/2500rpm |
| Impact power | 13/18/21/22KW |
| Frequency | 62/57/62/53Hz |
| Motor power | 45/55/75kW |
| Voltage | 380V 50Hz |
Drive & handling
| Feed beam tilt | 360° |
| Mast compensation length (mm) | 1600 |
| Boom model | K26F |
| Boom extension | 1200mm |
Mud & hydraulic
| Fuel tank (L) | 60 |
| Filtration precision | 10μ |
| Hydraulic oil (L) | 240 |
Tooling & air
| Rock drill | HC50 / 18U / HC95LMH/22U |
Performance & mobility
| Travel speed | 10km/h |
| Gradeability | 25%(14°) |
Other specifications
| Noise | <100dB(A) |
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.