Coal seam directional long drill hole uniform staged hydraulic fracturing pressure relief method

The invention relates to a coal seam directional long drill hole uniform staged hydraulic fracturing pressure relief method, which belongs to the technical field of hydraulic fracturing pressure relief, and comprises the following steps: step 1, acquiring a coal seam firmness coefficient f, a coal seam thickness h and a distance D between a peak line of a coal stress curve and a roadway; 2, a directional long drill hole is constructed in the coal body in the drill site, and the distance between the horizontal section of the directional long drill hole and the roadway is D; and 3, the constructed directional long drill hole is subjected to uniform segmented hydraulic fracturing, the segment length is S, the segment interval is M, S = f * D, and M = 4h/f. According to the coal seam thickness, the coal seam firmness coefficient and the peak value line of the coal body stress curve, the coal seam directional long drill holes are accurately formed in the coal body stress peak value line, segmented hydraulic fractu