Pressure relief construction structure for hard roof of coal mine tunnel

The utility model discloses a pressure relief construction structure for a hard roof of a coal mine tunnel, which comprises a long-distance directional pressure relief drilling group for relieving the pressure of an area to be relieved, and a high-pressure water injection mechanism arranged in a drilling field and used for injecting high-pressure water into the long-distance directional pressure relief drilling group, and the detection device is arranged in the coal seam roadway and is used for detecting internal fracture parameters of the to-be-depressurized area. The advanced pressure relief device is simple in structure and reasonable in design, advanced pressure relief of the coal seam hard roof is achieved, the mine pressure impact danger caused by large-area top suspension of the coal seam hard roof is relieved, the impact power phenomena such as working face support compression, hurricane and mine earthquake in the working face stoping process are avoided, meanwhile, the whole coal seam hard roof effec