High-pressure water jet coal seam three-dimensional slotting and pressure relief device and method

Abstract

The present invention belongs to the technical field of coal mine slotting and pressure relief, and specifically relates to a high-pressure water jet coal seam three-dimensional slotting and pressure relief device and method. A high-pressure water jet coal seam three-dimensional slotting and pressure relief device includes a drill pipe and a rotary cutting nozzle. The drill pipe is fixedly connected to the rotary cutting nozzle, and a water guide channel communicating with the rotary cutting nozzle is opened inside the drill pipe. The rotary cutting nozzle includes a nozzle body, on which side cutting nozzles, a planetary guide rail, a rail angle adjustment mechanism, a nozzle drive mechanism, and a main channel are arranged. The main channel is opened inside the nozzle body, and one end of the main channel is communicated with the water guide channel. The number of the side cutting nozzles is at least one, and the side cutting nozzles can be communicated with the main channel. The present invention can adjust the angle of the coal seam cutting slot cut by the side cutting nozzles according to the actual conditions of the coal seam, so that the angle of the coal seam cutting slot cut by the side cutting nozzles is adapted to the coal seam.