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2.6 ton compact electric flameproof crawler excavator with adjustable width, Model45 hydraulic breaker, 360 full rotation, low ground pressure for narrow small mines & water diversion tunnels.
WPZ-18.5/350L Mini Explosion-Proof Tunnel Repair Excavator
Product Introduction
WPZ-18.5/350L is a compact electric roadway maintenance machine tailor-made for narrow-section small mines, water diversion tunnels and underground corner renovation operations. Featuring an agile mini body with full 360° unrestricted slewing capability, it is highly favored for roadway maintenance projects in overseas small metal mines and coal mines.
Weighing only 2.6 tons with base dimensions of 3300×950×2150 mm, the machine’s overall width is adjustable to fit low, narrow tunnels and small mining working faces. It is fitted with a 18.5 kW explosion-proof motor and a hydraulic system with rated working pressure of 18/20 MPa, delivering stable operation and low failure rates. The full 360° rotary design eliminates frequent machine repositioning for tunnel muck clearance. Its maximum digging reach reaches 3500 mm, maximum digging height 3600 mm and maximum digging depth 1200 mm. Equipped with a 0.12 m³ bucket, it provides powerful digging force and high efficiency for clearing accumulated rock debris inside tunnels.
A standard Model 45 hydraulic breaker comes fitted to tackle loose dangerous rock and hard rock outcrops in roadways, removing the need for auxiliary rock splitting and breaking equipment. The crawler travel system achieves an ultra-low ground contact pressure of ≤0.08 MPa, preventing sinking on muddy gravel underground ground. With a ground clearance of 200 mm, it can steadily travel on slopes up to 18°. Its travel speed of 0.89 km/h enables precise low-speed handling, paired with a minimum track turning radius of only 1.7 m for flexible operation in tight confined spaces.
Its ultra-compact structure allows simple disassembly, requiring minimal space for cross-border sea freight or underground transportation to cut logistics expenses. The simplified mechanical layout and wear-resistant structural components greatly facilitate daily maintenance and spare parts replacement at overseas mining sites. This all-in-one unit completes rock breaking, excavation and muck loading simultaneously. A single operator can independently finish all roadway repair tasks including roadway widening, lining installation and waste rock removal, eliminating extra labor input and drastically lowering long-term operation labor costs. It serves as a lightweight, highly practical dedicated equipment for narrow underground roadway renovation.
Technical Parameters
| Parameter Item | Unit | WPZ-18.5/350L |
| Total Machine Weight | t | 2.6 |
| Overall Dimension (L×W×H) | mm | 3300 × 950 × 2150 (width adjustable to 1500) ±50 |
| Standard Bucket Capacity | m³ | 0.12±0.015 |
| Max Digging Height | mm | ≥3600 |
| Max Digging Depth | mm | ≥1200 |
| Minimum Ground Clearance | mm | ≥200 |
| Max Dumping Height | mm | ≥1800 |
| Max Vertical Digging Depth | mm | ≥1200 |
| Travel Speed | km/h | 0.89 |
| Hydraulic System Rated Working Pressure | MPa | 18/20 |
| Slewing Angle | ° | 360 |
| Explosion-proof Motor Rated Power | kW | 18.5 |
| Max Digging Reach | mm | ≥3500 |
| Max Bucket Digging Force | kN | ≥13 |
| Max Climbing Gradient | ° | ≤18 |
| Ground Contact Pressure | MPa | ≤0.08 |
| Minimum Track Turning Radius | m | ≤1.7 |
| Standard Hydraulic Breaker Model | – | Model 45 |
Model Code Explanation for WPZ & WPZC Roadway Repair Machines
Key components are detachable; interchangeable boom options allow adaptation to various earthwork assignments
The machine obtains coal mine MA safety certification, fitted with canopy cabin and steel crawler, suitable for construction in narrow underground roadways
Ultra compact body paired with breaker and dozer for rock demolition and site cleanup in confined working zones
With coal mine MA certification, steel tracks, front dozer blade, multi-section hydraulic arm and AR45 breaker, suitable for hard rock breaking and maintenance in narrow underground roadways
Extra rail wheel assembly enables switching between rail travel and crawler travel for rock breaking along rail lines
External power supply enables emission-free work indoors or underground for small-scale breaking tasks
Compact form factor for confined-site breaking tasks, electric drive meets low-emission construction requirements
Built-in explosion-proof electrical cabinet enables emission-free breaking work inside underground mines and enclosed spaces