Kaishan Underground Drilling Rigs/Underground Production Drilling Rigs
KSJ21
KSJ21 is a 1.6 m-wide hydraulic mining rig for medium-length blast holes and anchor-cable support in tunnels 2.9-4 m high and 2.8-4.5 m wide. Its rotating feed, swing mechanism and translational movement support 360° drilling and parallel holes. Horizontal and downward drilling require additional compressed air for cuttings removal; please consult the manufacturer for details.
Drilling capability — Tunnel working range
Height 2.9-4 m; width 2.8-4.5 m
Drilling capability — Drilling depth
35 m economical; 25 m with automatic rod handling
Drilling capability — Rock drill
HC95LQw / 22U / HC112LH
Drilling capability — Hole diameter
HC95LQw / 22U: 64-102 mm; HC112LH: 64-127 mm
Overview
KSJ21 is a 1.6 m-wide hydraulic mining rig for medium-length blast holes and anchor-cable support in tunnels 2.9-4 m high and 2.8-4.5 m wide. Its rotating feed, swing mechanism and translational movement support 360° drilling and parallel holes. Horizontal and downward drilling require additional compressed air for cuttings removal; please consult the manufacturer for details.
Key highlights
- ✓Economical drilling depth reaches 35 m; an optional 27+1 automatic rod-handling module uses 915 mm rods for drilling to 25 m and single-person operation.
- ✓A heavy-duty aluminium-alloy feed beam, front and rear hydraulic supports and a rod-support cylinder help maintain drilling stability and hole straightness.
- ✓A trolley-mounted control station provides a clear view; wireless remote control is optional.
- ✓The articulated, closed-circuit four-wheel-drive chassis fits small and medium-sized tunnels.
- ✓A stepped-piston high-frequency rock drill improves impact-wave transmission and reduces drilling-tool consumption.
Applications: Medium-length production blast holes in underground mines. · Anchor-cable support drilling. · Tunnels 2.9-4 m high and 2.8-4.5 m wide.
Specifications
Request the current specification sheet for this model using the button above.
Drilling capability
| Tunnel working range | Height 2.9-4 m; width 2.8-4.5 m |
| Drilling depth | 35 m economical; 25 m with automatic rod handling |
| Rock drill | HC95LQw / 22U / HC112LH |
| Hole diameter | HC95LQw / 22U: 64-102 mm; HC112LH: 64-127 mm |
| Impact power | HC95LQw: 24 kW; 22U: 22 kW; HC112LH: 26 kW |
| Impact frequency | HC95LQw: 57 Hz; 22U: 53 Hz; HC112LH: 46 Hz |
| Rotation torque | HC95LQw: 955 N·m; 22U: 1550 N·m; HC112LH: 1342 N·m |
| Rod thread | HC95LQw / 22U: T38, T45; HC112LH: T51 |
| Beam pitch | Forward 30°; backward 65° |
| Ring angle | 360° |
| Parallel drilling | 1640 mm |
| Rod length | 1000 mm; 915 mm with automatic rod handling |
| Feed beam length | 2770 mm |
| Feed extension | 700 mm |
| Automatic rod handling | Optional 27+1 module; 915 mm rods; drilling depth 25 m |
Engine & drive
| Chassis engine | Cummins B3.9CS4-80C, 59 kW / 2500 rpm |
| Electric motor (power unit) | 75 kW; 90 kW |
| Electrical supply | 380 V; 50 Hz; star-delta starting |
Dimensions & weight
| Dimensions (L × W × H) | 6750 × 1600 × (2580/3000) mm |
| Weight | approx. 11000 kg |
Drive & handling
| Drive system | Closed-circuit hydraulic four-wheel drive |
| Steering & axle | Articulated steering ±36°; rear axle swing ±6° |
| Tyres | 300-15 |
| Travel brake | Hydrostatic braking |
| Parking brake | Wet multidisc brake |
| Safety canopy & noise | Lifting roof: FOPS & ROPS certified; noise < 100 dB(A) |
Mud & hydraulic
| Impact/feed/positioning pump | Axial variable displacement piston pump |
| Rotation pump | Gear pump |
| Hydraulic oil system | Tank 240 L; filtration 10 μm; water cooler |
| Fuel tank | 30 L |
Tooling & air
| Air compressor | DLGF 0.7/8-5.5(B); 0.7 m³/min; 6-8 bar |
| Water pump | 4 kW; 5.8 m³/h |
| Shank lubrication | Electronic pulse lubrication pump; oil 180-250 g/h; air 0.3 m³/min |
Performance & mobility
| Travel speed | 10 km/h on level ground |
| Gradeability | 25% (14°) |
Applications
- Underground mining
- Production drilling
- Blast-hole 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 KSJ21?
Underground mining, Production drilling, Blast-hole drilling.
Which air compressor pairs with the KSJ21?
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.