Abstract: When the mine water is not discharged properly and reasonably,it is easy to produce water hammer and cause more problems.In order to prevent water hammer,relevant technicians should follow the closedloop theory,reasonably control the closing speed of gate valve,and adopt the controllable gate valve design mode.In order to further verify the actual effect of the controllable gate valve,the hydraulic system model of the numerical simulation software is established.The investigation and simulation results show that the servo control valve can achieve the effect of reasonably controlling the closing speed of the gate valve,and the controllable waterproof hammer gate valve has good stability,which provides more support for the later equipment selection.

Key words: Underground, Automatic drainage, Waterproof hammer, Controllable gate valve, Design and application