Design and Application Analysis of Remote Electro-Hydraulic Control System for Mine Drilling Rig

To address the problems of high personnel density, high safety risks, and low drilling efficiency associated with the operation of mine drilling rigs in close proximity, a remote electro-hydraulic control system based on electro-hydraulic proportional control was designed. The system adopts a three-level architecture of “surface command center – underground control unit – hydraulic actuation system”, integrating an S7-300 PLC, electro-hydraulic proportional valves, Wi-Fi/4G redundant communication, and a PID control algorithm to achieve remote control and real-time parameter monitoring of the drilling rig. Field application results show that the system reduces underground personnel by 2–3 persons per shift, increases drilling efficiency by 15%, saves approximately 450,000 CNY in annual labor costs, reduces the failure rate by 20%, and achieves a communication success rate of ≥99.9%, significantly improving the safety and automation level of drilling rig operations.