In order to study the development pattern of water-conducting fracture zones in hard roof strata, the 1312 working face of No. 15 coal seam in Yixin Coal Mine was selected as the research object. Various methods such as empirical calculation, key layer theory, FLAC3D numerical simulation, borehole viewing imaging, and segmented water injection were adopted to compare and analyze the development pattern of water-conducting fractures in hard roof strata. The research results show that the heights of the water-conducting fracture zone measured by the drilling observation method and the segmented water injection method are basically the same, and they can mutually verify each other. Both of these measurement methods are reliable. The height of the water-conducting fracture zone simulated by FLAC3D numerical simulation is relatively close to the measured height, and the credibility is relatively high. The calculated height of the water-conducting fracture zone using the empirical formula is significantly lower than the measured height, and the reliability is not high. Calculating the height of the water-conducting fracture zone directly using the empirical formula may lead to safety accidents. The height of the water-conducting fracture zone gradually increases as the coal seam is mined forward. When the mining length is approximately equal to the width of the working face, the height of the water-conducting fracture zone reaches its maximum and remains constant thereafter. Moreover, the water-conducting fracture zone is distributed in a saddle-shaped manner along the vertical direction. The height of the water-conducting fracture zone in the 1312 working face is 53.09 m, and the fracture-production ratio is 19.67. The research results provide certain basis and reference for the study of the height of the water-conducting fracture zone in the hard roof of the Qinshui mining area and its surrounding areas.