Technological progress of roadway repair machines for coal mines（haoyun）

The technical progress of the coal mine roadway repair machine of Shandong Haoyun Heavy Industry Machinery Co., Ltd. is as follows.

The coal mine roadway repair machine integrates multiple fields of technology such as mechanical, hydraulic, and electrical control, and continues to evolve with the trend of mine intelligence. The development and progress of its key technologies are mainly reflected in the following aspects:

1. Multi functional working mechanism: The working mechanism is the core of the roadway repair machine used in coal mines, including components such as breaking hammers, digging buckets, milling cutters, etc. Its structural performance directly determines the repair efficiency and quality. Early equipment often used simple single arm crushers or excavators with limited functionality. Modern coal mine tunnel repair machines commonly use quick change devices, which can switch between different working heads within minutes, achieving “one machine with multiple functions”. For example, through hydraulic quick change joints, one device can complete various operations such as crushing, excavation, shoveling, and bottom cleaning. The materials and design of the working mechanism are constantly improving, using high-strength alloy steel and wear-resistant coatings to adapt to harsh underground working conditions.
2. Hydraulic and executive system: The hydraulic system provides power for the coal mine roadway repair machine, and the executive mechanism (oil cylinder, motor, etc.) realizes action output. Early hydraulic systems had limited stability and power, which affected equipment performance. In recent years, with the application of load sensitivity, proportional control and other technologies, the efficiency and reliability of the hydraulic system of coal mine roadway repair machines have significantly improved. The new hydraulic components have high precision and high response characteristics, making the equipment operate more smoothly and position more accurately. At the same time, the reliability design of the hydraulic system, such as multiple filtration and oil temperature control, reduces the failure shutdown rate and ensures continuous operation capability.
3. Intelligent control and remote operation: Intelligence is an important direction for the development of roadway repair machines in coal mines. Traditional coal mine tunnel repair machines are mostly operated manually, and personnel need to enter dangerous areas. The new generation of equipment has introduced a remote control system, allowing operators to operate the machine from a safe location through remote control or video surveillance. This not only ensures personnel safety, but also lays the foundation for future unmanned operations. Many models are equipped with PLC control and sensor networks to monitor equipment status and environmental parameters in real-time, such as gas concentration, temperature, voltage and current. Through high-speed transmission and analysis of collected data, the system can automatically alert and optimize control, achieving intelligent fault diagnosis and adaptive working conditions.
4. Safety and environmental protection design: In terms of safety, the roadway repair machines used in coal mines have generally strengthened their structural strength and protective measures, such as adding protective roofs, anti roll frames, etc., to protect operators from falling rocks and accidental impact injuries. The electrical system meets explosion-proof standards, and the hydraulic pipelines use flame-retardant media to ensure safe operation in gas environments. In terms of environmental protection, with the popularization of green mining concepts, coal mine tunnel repair machines are being improved towards low pollution and low noise. Haoyun Heavy Industry’s electric driven coal mine roadway repair machine reduces exhaust emissions.

Overall, the technological progress of tunnel repair machines used in coal mines is reflected in their higher efficiency, intelligence, safety, and environmental friendliness. From the initial simple mechanical modification to the current intelligent equipment that integrates hydraulic, electronic control, and sensing, the technical performance of coal mine tunnel repair machines has made a qualitative leap and can better adapt to complex and changing underground environments.