Study on development key technologies of long-distance remote-control equipment train set in underground coal mine

In order to solve safety hazardscaused by the use of steel wire rope traction, frequent live-moving traction winches, high-altitude suspension monorail cranes, track laying of traditional winches in coal mines, and avoid accidents such as self-skidding, falling lanes, overturning, out of rails, wire rope breaks of equipment trains during transportation, the KDYZ40-40/2000 mine-used electronically controlled hydraulic mobile train set was developed to provide safety guarantee for the power control equipment of fully-mechanized mining face. The working principle of traditional winch traction equipment train was introduced, and the overall structure of long-distance remote-controlled equipment train set was analyzed. It solved problems of synchronous movement of equipment train with the working surface, deviation adjustment and automatic expansion and contraction of pipe by using equipment train’s overall synchronous lifting, step-and-shifting deviation adjustment system, anchoring traction device, self-moving flat vehicle and automatic telescopic tube cable device. The grouped remote electro-hydraulic control system adopted by equipment train,loop liquid supply and multi-sensor feedback closed-loop control method were analyzed, which improved long-distance control speed of train and realized synchronous and safe operation of train. The results show that use of remote control equipment train set can adapt to the working conditions of tunnel height above 2.0 m, eliminating winch traction, high-altitude suspension monorail hoisting and laying track, simplifying labor organization process, improving the overall operating safety and speed of equipment, and effectively ensuring safety and efficiency and promoting automation and unmanned management of fully-mechanized mining face, thus fundamentally revolutionize the working methods of equipment trains.