EBZ230M-2H Bolter Miner
The EBZ230M-2H bolter miner is an integrated mining machine combining tunneling cutting and simultaneous rock bolting, engineered for hard-rock mines and high-risk roadway construction projects worldwide. Equipped with a dual-mode cutting motor rated 230 kW/135 kW, it cuts rock with uniaxial compressive strength up to 90 MPa and delivers balanced efficiency and cost-effectiveness under regular 65 MPa hard-rock conditions.
The EBZ230M-2H bolter miner is an integrated mining machine combining tunneling cutting and simultaneous rock bolting, engineered for hard-rock mines and high-risk roadway construction projects worldwide. Equipped with a dual-mode cutting motor rated 230 kW/135 kW, it cuts rock with uniaxial compressive strength up to 90 MPa and delivers balanced efficiency and cost-effectiveness under regular 65 MPa hard-rock conditions. Fitted with two independent bolting units, the machine completes roof and sidewall anchoring during tunneling to eliminate the separate post-tunneling support phase and greatly shorten total roadway construction duration. The modular split design limits the heaviest single non-detachable component to 5.2 tons for easy segmented underground transportation. Covering a bolting height range of 3.5–5.1 m, it excels in long-distance roadway projects requiring strict roof stability control and handles hard strata efficiently as a core solution for parallel excavation-and-support workflows.
| EBZ230M-2H Roadheader with Bolter – Main Parameters | |
| Total weight (t) | 88 |
| Machine body length (m) | 12.28 |
| Machine body height (m) | Body height 2.2 / Cutting head horizontal 2.6 / Highest point 2.6 |
| Track outer width (m) | 2.86 |
| Gathering head total width (m) | 3.6 |
| Climbing ability (°) | ±18 |
| Cutting head undercut (mm) | 250 |
| Gathering head undercut (mm) | 350 |
| Max / economical uniaxial compressive strength of cut rock (MPa) | 90 / 65 |
| Ground bearing pressure (MPa) | 0.17 |
| Cutting motor power (kW) | 230 / 135 |
| Cutting head speed (r/min) / Stroke (mm) | 46 / 23 / 700 |
| Oil pump motor power (kW) | 132 |
| Supply voltage | AC1140V – 50Hz |
| Bolting height (m) | 3.5 – 5.1 |
| Bolting width (m) | 4.5 – 6.1 |
| 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: 2.4 × 1.38 × 1.27 Rear main frame: 2.37 × 1.4 × 1.45 Front chute: 2.8 × 0.74 × 0.68 Rear support frame: 3.0 × 1.62 × 1.47 |
| Maximum non-detachable part weight (t) | 5.2 |
Parallel excavation and bolting to shorten total construction schedule
Dual bolting units perform anchoring synchronously with tunneling to reduce exposed empty-roof time and lower surrounding-rock collapse risks. Compared with separate roadheader and bolter fleets, it remarkably cuts overall project duration. With 350 N·m torque, 500 rpm rated rotating speed, 4.2 ㎡ single-round supporting area and 30 KN supporting force, the bolting system delivers durable, reliable reinforcement for long-term roadway stability.
Dual-power cutting modes for flexible hard-rock adaptation
The 230 kW high-power mode tackles extra-hard strata while the 135 kW mode saves energy in ordinary rock conditions. Dual rotating speeds of 46 r/min and 23 r/min plus a 700 mm telescopic cutting stroke reduce jamming against interbedded hard rock and irregular surrounding rock, allowing operators to adjust cutting rhythm according to real-time strata properties.
Heavy-duty undercarriage for stable mobility across rough underground terrain
The 88-ton machine distributes weight evenly via 2.86 m widened tracks to maintain a 0.17 MPa ground pressure for outstanding anti-slip and anti-sinking performance. ±18° gradeability together with 250 mm cutting-head sumping depth and 350 mm shovel-plate sumping depth continuously clears floor gangue for smooth travel on slopes and uneven ground. The 3.6 m wide shovel plate collects muck over a large zone to match high-intensity cutting output and minimize blockage-related downtime.
Wide bolting parameter coverage for multi-section roadway compatibility
Bolting height ranges 3.5–5.1 m and bolting width ranges 4.5–6.1 m to fit medium-and-large span roadways. Two bolters reinforce roof and sidewalls simultaneously, suiting main haulage roadways and return air roadways of diverse cross-section sizes.
Modular split transportation for convenient deployment in global mines
Split components including front frame, rear frame, front conveyor and rear support frame can be shipped separately; the maximum single component weight of 5.2 tons fits narrow underground haulage passages. The 132 kW oil pump motor works with internationally mainstream mine power supply AC1140V-50Hz, supporting stable long-duration full-load operation with low failure rates and easy on-site maintenance for overseas mining sites.
