EBZ320 Heavy-Duty Cantilever Roadheader
EBZ320 heavy-duty cantilever roadheader is dedicated to tunneling ultra-hard rock in large-section roadways. With total weight of 123 tons, it is equipped with a dual-mode cutting motor (320/240 kW) supporting multiple rotating speeds: 37 r/min, 55 r/min and 27 r/min. It cuts hard rock with uniaxial compressive strength up to 120 MPa in extreme conditions and runs energy-efficiently for strata of 75 MPa.
EBZ320 heavy-duty cantilever roadheader is dedicated to tunneling ultra-hard rock in large-section roadways. With total weight of 123 tons, it is equipped with a dual-mode cutting motor (320/240 kW) supporting multiple rotating speeds: 37 r/min, 55 r/min and 27 r/min. It cuts hard rock with uniaxial compressive strength up to 120 MPa in extreme conditions and runs energy-efficiently for strata of 75 MPa. The 200-kW oil pump motor delivers abundant hydraulic power and stable load performance.Working coverage: cutting height 3.0–5.4 m, cutting width 4.4–6.6 m, cutting area 13.2–35.6 ㎡ for extra-large-section mine roadways. Two shovel-plate widths (3.6 m / 3.8 m) are optional, and the 460-mm shovel-plate sumping depth ensures outstanding muck discharge efficiency. The 3.05-m widened tracks maintain ground pressure at 0.19 MPa, and ±18° gradeability adapts to sloped roadway scenarios.The split modular structure limits the heaviest single non-detachable component to 13 tons for separate cross-border shipping and segmented underground transfer. Compatible with mainstream international mine power supply AC1140V-50Hz, it serves as the flagship tunneling machine for large-scale construction in deep hard-rock mines.
| EBZ320 Boom-Type Roadheader – Main Parameters | |
| Total weight (t) | 123 |
| Machine body length (m) | 12.8 |
| Machine body height (m) | Cover plate 2.15 / Cutting head horizontal 2.55 |
| Track outer width (m) | 3.05 |
| Gathering head total width (m) | 3.6 / 3.8 |
| Positioning cutting height (m) | 3.0 – 5.4 |
| Positioning cutting width (m) | 4.4 – 6.6 |
| Cutting area (m²) | 13.2 – 35.6 |
| 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) | 0.19 |
| Cutting motor power (kW) | 320 (320/240) |
| Cutting head speed (r/min) | 37 (55/27) |
| Oil pump motor power (kW) | 200 |
| Supply voltage | AC1140V – 50Hz |
| Maximum non-detachable part dimensions (m) | Front main frame: 4.04 × 1.5 × 1.73 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 multi-gear powertrain for ultra-hard rock excavation
The 320-kW heavy-duty mode crushes compact rock of 120 MPa and fault-gangue strata, while the 240-kW energy-saving mode cuts ordinary rock to reduce operating costs. Switchable speeds balance fast advance and high-torque rock breaking; the machine resists stalling under heavy loads for long-term continuous operation in complex geology.
Strong capability for extra-large-section tunneling with one-pass roadway forming
Maximum cutting area reaches 35.6 ㎡ to complete large roadways in a single pass. The 220-mm cutting-head sumping depth plus 460-mm shovel-plate sumping depth thoroughly removes floor waste rock, cutting manual leveling work and improving roadway smoothness.
Stable wide-track chassis for reliable mobility on tough terrain
3.05-m widened tracks prevent sinking and slipping on muddy soft ground with controlled ground pressure; ±18° gradeability suits uphill and gently sloped roadways. Two optional wide shovel plates collect muck broadly to match intensive tunneling and reduce blockage downtime.
Heavy-duty structural design for longer service life of core components
123-ton overall weight enhances operational stability. Mine-grade wear-resistant parts are adopted for cutting units, hydraulic valves and transmission assemblies to lower failure rates under heavy hard-rock loads and extend effective monthly tunneling time.
Modular split transportation for easy deployment in large overseas mines
Separable modules including front main frame, front conveyor and rear support frame are shipped separately, with the maximum single-component weight of 13 tons suitable for narrow underground haulage passages. Matched with international mine power standards, modular on-site assembly shortens commissioning cycles.
Customized pre-sales technical support
We design speed-mode matching, split-transport layouts and staged tunneling schedules according to local rock hardness, roadway dimensions, slope distribution and underground logistics. Geological hazards such as faults and broken surrounding rock are assessed in advance to deliver full technical support for overseas projects.
Full-cycle overseas after-sales guarantee
Specialized training for heavy-duty hard-rock operation and slope-site skills is provided remotely. Stocked genuine spare parts for cutting motors, hydraulic parts and transmission assemblies are available; online troubleshooting of speed-switching and hydraulic faults minimizes downtime and ensures stable high-yield production.
