Abstract: Introduces the explosion-proof electric proportional control system general scheme of the coal mine hydraulic driving vehicle and the explosion-proof treatment measures of it's hardware system; By the explosion proof electric proportional pressure reducing valve output characteristics test, researches the linear function between the control voltage and the output pressure；Through the explosion-proof electric control pump characteristics test, researches the pump characteristics and the linear relationship between the maximum torque and the servo pressure; According to the engine characteristic curve，researches the matching of engine and explosion-proof electric control pump, sets reasonable goal load value, puts forward the closed pump displacement control strategy based on the function relationship between the rotational speed and voltage control , and develop the electric proportional displacement control program based on the PLUS+1 GUIDE; A hydraulic support vehicle using the explosion-proof electric proportional control system, obtained the power and emission performance better than those applied the mechanical hydraulic servo control.

Key words: Explosion proof electric control pump, Displacement control strategy, Load Settings, NFPE, Closed hydraulic circuits, Chock carrier