Underground mining transport vehicles are core specialized equipment for material transfer in underground mines. Operating long hours in harsh environments characterized by dampness, dust, narrow spaces, bumps, steep slopes, and heavy loads, their wear rate is far greater than that of open-pit transport equipment. Scientific and standardized periodic maintenance is crucial for preventing equipment failures, ensuring underground transport safety, and extending equipment lifespan.
Daily maintenance per shift is the core of basic maintenance for underground transport vehicles and is a mandatory daily safety procedure. Before and after each operation, personnel must conduct a comprehensive routine inspection, focusing on the braking system, steering system, lighting circuits, tire pressure, oil lines, and sealing components. Filter dust should be cleaned promptly, and loose screws tightened. Given the damp underground environment, special attention should be paid to checking for leaks in the electrical circuits and hydraulic lines. Mud and debris should be removed from the vehicle body promptly, eliminating minor potential hazards and ensuring the equipment is fault-free and hazard-free before each shift, reducing the risk of unexpected failures.
The monthly routine maintenance cycle is approximately 100 hours of cumulative equipment operation. Compared to routine inspections, monthly maintenance is more comprehensive and systematic. Maintenance personnel need to thoroughly inspect the operating status of all vehicle components, check the engine and front/rear axle lubricant levels and conditions, calibrate brake clearances, tighten all connecting bolts, and replace clogged or worn filters. Simultaneously, the chassis transmission and articulated components are inspected and adjusted, addressing any details overlooked in routine maintenance to ensure stable operation of all vehicle systems and suitability for high-frequency, heavy-load underground transportation conditions.
Quarterly deep maintenance is set at a cumulative working hour of 250 to 300 hours, a critical maintenance milestone for ensuring equipment performance. This stage requires a complete oil change, including engine oil, transmission fluid, and hydraulic fluid, thoroughly cleaning impurities from the oil lines. It also focuses on inspecting the wear of differential locks, suspension systems, and transmission components, applying grease to all articulated points, adjusting the performance of core braking and hydraulic systems, and repairing minor wear parts to prevent small faults from accumulating into major equipment hazards.
Annual overhaul maintenance represents the highest level of equipment maintenance, corresponding to approximately 2000 cumulative working hours. Maintenance personnel must conduct a thorough, disassembly-based overhaul of the entire vehicle, comprehensively inspecting core systems such as power, braking, steering, and load-bearing capacity. They must replace aging seals and severely worn parts, calibrate equipment operating parameters, and complete overall performance testing and debugging. This comprehensive overhaul restores the equipment to its optimal operating condition, fundamentally reducing safety risks in underground operations.
Industry experts remind that underground working conditions are harsh and complex. If vehicles operate under excessive loads for extended periods, maintenance cycles should be appropriately shortened. Standardized, tiered, periodic maintenance effectively reduces equipment failure rates and operating costs, while continuously improving the efficiency of underground transportation operations, providing a solid equipment guarantee for safe production and stable operation in mines.
