Abstract:In order to solve the problem of frequent blocking caused by large-block coal face plate at the entrance of the reload machine, a large-block coal crushing device with a vertical pillar type in fully mechanized coal mining face is put forward. The main motive force was come from the Emulsion Pumping Station of the fully mechanized coal face, which was driven by the front and back oil cylinders, the left and right oil cylinders, the angle regulating oil cylinder and the column oil cylinder. Through the hydraulic system controlled the action of each oil cylinder, the multi-degree freedom movement of the large-block coal crushing device was come true. The field test shows that the device is simple in operation and good in equipment reliability. It basically solves the problem of blockage caused by large-block coal, and has no detrimental impact on the normal operation of other equipment. It ensures continuous production efficiency of the working surface. And the economic benefit is remarkable. Therefore, the device has good practicability and great prospect of popularization and application.