Abstract: Based on traditional scraper conveyor, emulsion pump drive of full-mechanized caving mining face and close for liquid supply problems, high-power output over a long distance high voltage explosion-proof composite transducer and intelligent integrated over a long distance for the hydraulic system, to achieve the optimal matching of equipment working power supply for the liquid system and long-distance power supply for the liquid output is imminent.The whole project is divided into long distance frequency conversion drive project of front and rear scraper conveyor and long distance liquid supply project of intelligent pump station integrated system.The research of the long distance frequency conversion drive project of the front and rear scraper conveyor is as follows: in the 2305 working face of XJulong Coal Mine, two sets of BPJV-3×1600/3.3 high-voltage combined frequency converters of mine flame-proof and intrinsical-safety are adopted, and the "one-tow-two" mode is used to drive two 1200 KW motors of the nose and tail.Using frequency conversion remote power supply technology to realize the heavy load soft start of scraper conveyor motor.Intelligent pumping station integrated system project for fluid for over a long distance, using high pressure large flow high reliable intelligent emulsion pump and spray pump station and automatic liquid and multi-stage filtration system for liquid form an integrated system, the use of long-distance liquid way is to put the pump station system for distance, face far cavern by laying long-distance Lord for fluid pipe, advocate the fluid pipe, water pipe,The system of supplying high pressure emulsion, spray dust cooling water and receiving low pressure return liquid to each hydraulic support liquid point.The project has been successfully implemented in 2305 working face of new julong coal mine, which has a significant guiding and demonstration effect on the design of long-distance liquid supply and power supply system of new working face of large coal mine under complex geological condition of rock burst in China.The results of the project can significantly reduce the incidence of safety accidents in fully mechanized caving face, reduce the cost of equipment overhaul and maintenance, reduce the mechanical wear of the equipment, improve the service life of the equipment, improve the reliability of the system, and ensure the opening probability of the equipment in the working face.At the same time, it is of great significance to achieve the goal of reducing personnel and improving efficiency, safe production, energy saving and consumption reduction in the coal mine working face, which is of great significance to ensure the safety, high yield and high efficiency of the fully mechanized caving working face.Compared with similar technology at home and abroad, it has obvious advantages in power station pulling mode, power supply liquid distance, centralized control mode, maintenance time, installation and withdrawal cycle, etc., which can be widely promoted and applied in the same industry coal mining face.