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MWD's full range of underground electric explosion-proof hydraulic excavators, covering a variety of narrow body models, the 1.6-meter narrow tunnel model is suitable for narrow mine tunnels, and the three-section jib supports 180°/360° Rotating, steel crawler with strong climbability and low grounding specific pressure. The whole machine is purely electric and has no exhaust gas. It can be equipped with a breaker and remote control system to meet the needs of coal mines and metal mines for excavation and slag removal and roadway dressing construction. The manufacturer supports customized sizes and configurations on demand, and can be exported directly from stock.
Main Technical Parameters of Coal Mine Hydraulic Excavators
The MWD series coal mine hydraulic excavator is a specialized electric explosion-proof excavation equipment designed specifically for underground mines. Its features include a lightweight structure, making it suitable for operation in narrow tunnels. Several standard models are currently available, including the 1.6-meter narrow-body MWD6/0.3L(A) rotary boom excavator, suitable for small to medium-sized mines and tunnels, as well as low and narrow tunnels. The machine uses an explosion-proof motor and a variable hydraulic system with reasonable pressure and flow matching, preventing overheating during long-term continuous operation, resulting in low operating noise and enhanced safety in enclosed underground environments.
The equipment comes standard with a three-section rotary boom, with the auxiliary boom supporting 180° and 360° rotation. The machine body can rotate 360° without dead angles. It uses a steel tracked chassis with high ground clearance, strong climbing ability, and stable operation on muddy and gravel roads, reducing the risk of getting stuck. The machine has a pre-installed hydraulic expansion interface, allowing it to be equipped with a matching hydraulic breaker to meet various operational needs such as excavation, slag removal, rock breaking, and tunnel expansion.
This machine is flexible in size with a small turning radius, making it easy to enter narrow tunnels. Its bulldozer blade and large-capacity bucket improve work efficiency. All electrical components are explosion-proof and equipped with multi-layer leakage and overload protection. The manufacturer can adjust the machine’s width, power, and accessory configuration according to the width, slope, and construction requirements of the mine tunnel, supporting non-standard customization. The machine has been debugged before leaving the factory and comes with spare parts and on-site technical guidance.
The drawings are paired with side operation views and top top views to completely list the dimensions of the entire machine, maximum excavation extension distance, and height difference parameters, which can be used for tunnel space verification and equipment selection verification for overseas projects.
| project | unit | Parameter value |
| Specification | MWD6/0.3L（A） | |
| Work organization structure | / | three-section arm |
| Auxiliary arm rotation angle | ° | 360/180 |
| electric motor | KW | |
| Hydraulic system | ||
| Rated pressure | Mpa | 22 |
| Main pump flow | L/min | 120 |
| Hydraulic pump type | / | variable pump |
| Hydraulic walking | / | Integrated |
| Running gear data | ||
| walking form | / | Chain walking |
| Grounding pressure | Mpa | ≤0.1 |
| driving speed | km/h | 0.98 |
| ground clearance | mm | 300 |
| Climbing ability | ° | ≥20 |
| Work organization data | ||
| Rotation angle | ° | 360 |
| Rotation speed | r/min | 0-9 |
| track type | / | steel chain track |
| Track width | mm | 300 |
| Excavator bucket capacity | m³ | 0.28 |
| Excavation radius | mm | ≥3906 |
| Maximum tilt height | mm | ≥4450 |
| Maximum unloading height | mm | ≥1700 |
| Maximum digging depth | mm | ≥1200 |
| Minimum turning radius | mm | ≤1600 |
| Bucket digging force | KN | 15 |
| Hydraulic working flow | L/min | 4.9 |
| Dozer blade width×height | mm | 1600×270 |
| Overall dimensions (length × width × height) | mm | 3750×1600×2250 |
| Vehicle weight | T | 6 |
| Hydraulic breaker data | ||
| Total weight | AR68 | |
| total length | Kg | 189 |
| full width | mm | 1382 |
| Drive hydraulic | mm | 271 |
| Drive oil quantity | kg/cm² | 100-130 |
| Hose diameter | bpm | 500-1000 |
| Drill rod diameter | inch | 1/2 |
| Drill rod weight | mm | 68 |
Standard Model Analysis of MWD / MWC / KWD / KWC Mining Hydraulic Excavators
Configuration table of mining hydraulic excavators
Tracked mining excavator fitted with hydraulic breaker, ideal for underground rock breaking jobs
High-flexibility rotary breaking arm for underground hard rock demolition and roadway widening construction
High-power milling head adapts to hard rock roadway tunneling and roadway renovation
Heavy-duty mining breaker excavator engineered for underground hard rock breaking and roadway rehabilitation
Medium-sized explosion-proof mining excavator for underground roadway excavation and surrounding rock breaking maintenance