EBZ320M-2H Heavy-Duty Bolter-Miner
EBZ320M-2H heavy-duty bolter-miner is engineered for large-section roadway construction in deep ultra-hard rock mines. It weighs 138 tons and is fitted with a 320-kW high-power cutting motor running at a constant cutting-head speed of 37 r/min. It excavates rock with uniaxial compressive strength up to 120 MPa and delivers energy-efficient tunneling for conventional 75-MPa strata. The 200-kW oil pump motor supplies steady, abundant hydraulic power under heavy loads.
EBZ320M-2H heavy-duty bolter-miner is engineered for large-section roadway construction in deep ultra-hard rock mines. It weighs 138 tons and is fitted with a 320-kW high-power cutting motor running at a constant cutting-head speed of 37 r/min. It excavates rock with uniaxial compressive strength up to 120 MPa and delivers energy-efficient tunneling for conventional 75-MPa strata. The 200-kW oil pump motor supplies steady, abundant hydraulic power under heavy loads. The bolting system integrates two roof bolters: each bolter outputs torque of 350 N·m at a rated speed of 500 rpm, with supporting area of 4.2 ㎡ and supporting force of 30 KN. Bolting height ranges 3.8–5.4 m and bolting width 4.4–6.6 m, enabling simultaneous tunneling and roof reinforcement without separate secondary bolting shifts.Mobility and muck removal: the 3.22-m widened tracks keep ground pressure at 0.20 MPa and offer ±18° gradeability for sloped roadways. The 3.8-m wide shovel plate with 460-mm shovel-plate sumping depth and 220-mm cutting-head sumping depth efficiently collects waste rock and cleans roadway floors. The split modular structure limits the heaviest single non-detachable component to 13 tons for flexible cross-border shipping and segmented underground transfer. Compatible with international mine power supply AC1140V-50Hz, it serves as the flagship bolting-tunneling equipment for rapid roadway formation in hard-rock mines.
| EBZ320M-2H Roadheader with Bolter – Main Parameters | |
| Total weight (t) | 138 |
| Machine body length (m) | 12.9 |
| Machine body height (m) | Body height 2.15 / Cutting head horizontal 2.6 / Highest point 3.0 |
| Track outer width (m) | 3.22 |
| Gathering head total width (m) | 3.8 |
| Climbing ability (°) | ±18 |
| Cutting head undercut (mm) | 220 |
| Gathering head undercut (mm) | 460 |
| Max / economical uniaxial compressive strength of cut rock (MPa) | 120 / 75 |
| Ground bearing pressure (MPa) | 0.20 |
| Cutting motor power (kW) | 320 |
| Cutting head speed (r/min) | 37 |
| Oil pump motor power (kW) | 200 |
| Supply voltage | AC1140V – 50Hz |
| Bolting height (m) | 3.8 – 5.4 |
| Bolting width (m) | 4.4 – 6.6 |
| Number of bolters | 2 |
| Bolter torque (N·m) | 350 |
| Bolter rated speed (rpm) | 500 |
| Support area (m²) | 4.2 |
| Support force (kN) | 30 |
| Maximum non-detachable part dimensions (m) | Front main frame: 4.04 × 1.5 × 1.73 Rear main frame: 1.54 × 1.4 × 1.66 Front chute: 2.84 × 0.72 × 0.66 Rear support frame: 1.79 × 2.96 × 1.52 |
| Maximum non-detachable part weight (t) | 13 |
High-power hard-rock tunneling plus synchronous bolting to shorten roadway completion cycles
The 320-kW cutting system breaks ultra-hard rock up to 120 MPa and fault-gangue formations, while two bolters anchor surrounding rock in real time during excavation. Separate post-tunneling bolting phases are eliminated, cross-team safety risks are reduced, and roadway construction speed is greatly improved.
Stable professional bolting parameters for reliable surrounding-rock protection
350 N·m torque, steady 500-rpm rotation and 30-KN supporting force firmly fasten surrounding rock of different hardness levels. The 4.2-㎡ supporting area fully covers mainstream large-section roadways, effectively preventing roof collapse and side spalling to enhance underground safety.
Robust heavy-duty chassis with excellent trafficability for complex roadways
3.22-m widened tracks distribute weight evenly to avoid slipping and sinking on muddy soft ground; ±18° gradeability adapts to uphill and gently sloped roadways. The 460-mm large shovel-plate sumping depth thoroughly clears floor waste rock, reduces manual leveling work and delivers smoother roadway pavement.
Heavy-duty wear-resistant structure for low failure rates in long continuous operations
The 138-ton overall weight stabilizes rock-breaking performance. Mine-grade wear-resistant components are adopted for cutting units, bolting mechanisms, hydraulic valves and transmission assemblies to extend effective monthly working hours compared with ordinary machines under heavy hard-rock loads.
Modular split transportation for efficient deployment in large overseas mines
Separable modules including front main frame, rear main frame, front conveyor and rear support frame are shipped separately. The maximum single-component weight of 13 tons suits narrow underground haulage passages. Matching mainstream overseas mine power standards, modular on-site assembly shortens commissioning cycles.
Customized pre-sales technical support
We design speed matching, bolt layout schemes and split-transport routes according to local rock hardness, roadway dimensions, slope distribution and bolting specifications. Geological hazards such as broken surrounding rock and faults are assessed in advance to deliver complete construction solutions for overseas projects.
Full-cycle overseas after-sales guarantee
Specialized training for heavy bolter-miner operation and sloped-site tunneling-bolting coordination is provided remotely. Stocked genuine spare parts for cutting motors, bolting assemblies and hydraulic components are available; online troubleshooting of speed, hydraulic and bolting-system faults minimizes downtime and ensures stable high-yield production.
