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The WPZ-75/50/600L is a high-power all-in-one crawler tunnel rehabilitation machine integrating rock milling, hydraulic breaking, excavation and automatic mucking functions. Equipped with a 75kW flameproof motor and stable hydraulic system, this modular underground maintenance machine features flexible operation, low ground pressure and easy maintenance. Ideal for medium & large coal mines, metal mines and tunnel reconstruction projects, it realizes one-machine multi-purpose construction to reduce labor and equipment costs.
WPZ-75/50/600L Multi-Functional Underground Tunnel Rehabilitation Machine
Product Overview
WPZ-75/50/600L is a high-power all-in-one tunnel maintenance crawler machine integrating milling, rock breaking, excavation and automatic mucking functions. It is professionally designed for roadway expansion, reconstruction and soft rock excavation in medium and large coal mines & metal mines, and widely applicable to various overseas tunnel and underground mining projects.
This machine is equipped with a 75 kW flameproof explosion-proof motor and variable displacement hydraulic pump system. The hydraulic system runs at a rated working pressure of 23.5 MPa with a maximum main pump flow of 130 L/min, delivering stable, continuous power output for long-hour underground operation. It adopts a three-section telescopic working arm matched with a 0.3 m³ standard bucket, supporting three interchangeable working modes: digging, hydraulic rock breaking and milling cutting. A hydraulic breaker with 600 J rated impact energy comes as standard, compatible with 53 mm / 68 mm breaker chisels. The whole machine’s operating noise is controlled below 120 dB(A), and the front milling drum enables full-area rock trimming, profiling and surface finishing.
The travel system adopts integrated hydraulic motor-reducer drive with heavy-duty steel crawlers, with track width of 400 mm and total track length of 2,855 mm. Its ground contact pressure is limited to ≤0.1 MPa, paired with a minimum ground clearance of 190 mm for stable driving. The machine can smoothly climb hard-surface slopes within ±16°. Travel speed is steplessly adjustable from 0 to 3.5 km/h, and the working arm features a horizontal slewing angle of ±40°. The minimum overall turning radius is ≤5,300 mm, providing outstanding flexibility inside medium-to-large mine roadways.
A single-strand single-drive scraper conveyor is fitted at the rear. The scraper chain runs at a constant speed of 40 m/min with a standard unloading distance of 3,000 mm, realizing fully automatic conveying of broken rock fragments without auxiliary haulage equipment. Its overall dimension reaches 10,000 × 1,600 × 2,500 mm with a total operating weight of 10.1 tons. Balanced multi-function working parameters deliver a wide operation range, allowing one-machine completion of roadway widening, foundation trimming and full muck removal procedures.
The whole machine adopts modular assembly design. Core wear parts including scraper plates, breaker chisels and digging buckets are standardized for quick disassembly, replacement and routine maintenance at overseas mining sites. One machine replaces multiple independent construction devices, cutting equipment procurement costs and underground staffing quantity, thus drastically lowering comprehensive roadway rehabilitation expenses. It acts as an efficient integrated construction solution for large-section underground roadway renovation.
Complete Technical Parameter Table
| Parameter Category | Parameter Name | Unit | WPZ-75/50/600L |
| Working Arm Assembly | Working Arm Structure | – | Three-section Telescopic Arm |
| Main Power System | Flameproof Motor Rated Power | kW | 75 |
| Hydraulic System | Rated Working Pressure | MPa | 23.5 |
| Max Main Pump Flow Rate | L/min | 130 | |
| Hydraulic Pump Type | – | Variable Displacement Pump | |
| Crawler Travel System | Drive Mode | – | Integrated Hydraulic Motor-Reducer Drive |
| Travel Form | – | Steel Crawler Propulsion | |
| Ground Contact Pressure | MPa | ≤0.1 | |
| Stepless Travel Speed | km/h | 0–3.5 | |
| Minimum Ground Clearance | mm | ≥190 | |
| Max Climbing Gradient (Hard Ground) | ° | ±16 | |
| Working Arm Slewing Angle | ° | ±40 | |
| Slewing Rotation Speed | r/min | 0–10 | |
| Total Track Length | mm | 2855 | |
| Track Shoe Width | mm | 400 | |
| Digging Working Unit | Standard Bucket Capacity | m³ | 0.3 |
| Max Digging Height | mm | 5000 | |
| Max Dumping Height | mm | 1400 | |
| Max Digging Depth | mm | 1000 | |
| Max Digging Reach | mm | 2130 | |
| Max Digging Width | mm | 4810 | |
| Hydraulic Rock Breaker | Nominal Working Pressure | MPa | 9–12 |
| Required Hydraulic Flow | L/min | 25–50 | |
| Adjustable Impact Frequency | Hz | 7.5–16.5 | |
| Rated Impact Energy | J | 600 | |
| Matching Chisel Diameter | mm | 53 / 68 | |
| Operating Noise | dB(A) | ≤120 | |
| Max Breaking Width | mm | 5020 | |
| Max Breaking Height | mm | 4600 | |
| Max Breaking Depth | mm | 1350 | |
| Milling Cutting Unit | Max Milling Width | mm | 5160 |
| Max Milling Height | mm | 5330 | |
| Max Milling Depth | mm | 1150 | |
| Rear Scraper Conveyor | Standard Discharge Height | mm | 1400 |
| Standard Unloading Distance | mm | 3000 | |
| Scraper Chain Running Speed | m/min | 40 | |
| Conveyor Structure | – | Single-strand Single-drive Chain | |
| Max Conveying Lump Size (W×H) | mm | 400×280 | |
| Overall Machine Data | Minimum Turning Radius | mm | ≤5300 |
| Overall Dimension (L×W×H) | mm | 10000×1600×2500 | |
| Total Operating Weight | kg | 10100 |
Model Code Explanation for WPZ & WPZC Roadway Repair Machines
Front milling drum breaks rock, debris is conveyed out through onboard structure to realize continuous excavation and mucking
This all-in-one machine integrates rock milling crushing and material conveying. The front milling head breaks surrounding rock, while the collection structure feeds debris to rear belt conveyor for transportation. Crawler chassis adapts to rough underground roads, widely applied for tunnel/mining roadway excavation and soft rock mucking.
The bucket feeds excavated material directly into front gathering unit to skip separate loading steps and boost underground mucking efficiency
Multifunctional model engineered for steep underground sections; it combines breaking, loading and conveying, with heavy-duty chute for extended service life
Multi-section boom and folding bucket deliver great flexibility in confined spaces to raise roadway mucking efficiency
Multifunctional equipment integrating crushing, material collection and scraper conveying; folding bucket adapts to operation in narrow roadways
Multifunctional mining equipment completing excavation and mucking at the same time, applicable to soft rock roadway excavation and trimming
Multifunctional equipment integrating crushing, material collection and scraper conveying; folding bucket adapts to operation in narrow roadways
All-in-one underground construction machine integrating milling and muck conveying, suitable for soft rock roadway excavation and trimming work
Durable mining mucking equipment, suitable for heavy-duty long-cycle roadway mucking construction underground
All-in-one rock breaking and mucking equipment for hard rock tunneling and muck removal in underground roadways
Integrated milling mucking machine executes hard rock cutting and muck conveying simultaneously
Explosion-proof tracked mucking loader with built-in telescopic breaker, suitable for hard rock excavation and mucking on steep-gradient roadways