针对神东矿区布尔台煤矿坚硬顶板诱发动压灾害治理难题，建立了坚硬岩层压裂缝扩展方程，揭示了坚硬顶板强矿压分段水力压裂超前弱化机理；采用三维裂缝数值模拟对坚硬顶板分段压裂裂缝形成规律进行分析，确定了布尔台煤矿42108工作面顶板压裂钻孔布置方式，并在神东布尔台煤矿典型的工作面开展了工程应用。应用结果表明：压裂弱化影响范围为沿工作面走向上距切眼150~450 m，沿工作面倾向上距切眼50~280 m；压裂裂缝空间分布中条带状异常11个，压裂裂缝方向多处于36°~54°与地层最大主应力方向（NE55°~NE77°）近平行；压裂裂缝延展半径增大，垂向上裂缝高度变化不明显，裂缝宽度有微弱降低；压裂段间距越大，压裂裂缝影响半径越小，压裂裂缝影响半径由27 m增大至35 m，最大降幅达2.85 m，沿钻孔方向裂缝发育半径由15.2 m降低为12.8 m；在进入压裂段后，周期来压的最高值和平均值分别降低了约15.3%和约9.6%，周期来压的步距平均缩短了约8.1%。工程实践表明：坚硬顶板超前分段水力压裂，有效减弱了矿压显现强度，实现了坚硬顶板动力灾害的弱化解危。

Aiming at the difficult problem of controlling dynamic pressure disaster induced by hard roof in Buertai Coal Mine in Shendong Mining Area, the expansion equation of pressure fractures in hard rock stratum is established, and the mechanism of advanced weakening of segmented hydraulic fracturing in hard roof under strong ground pressure is revealed. The formation law of segmented hydraulic fracturing in hard roof is analyzed by using three-dimensional fracture model numerical simulation, and the arrangement of roof fracturing drilling holes in 42108 working face of Buertai Coal Mine is determined, and the engineering application is carried out in the typical working face of Buertai Coal Mine in Shendong Mining Area. The application results show that the influence range of fracturing weakening is 150-450 m away from the cutting hole along the working face, 50-280 m upward along the working face. There are 11 zonal anomalies in the spatial distribution of fracturing fractures, and the direction of fracturing fractures is mostly 36°-54°, which is nearly parallel to the direction of maximum principal stress (NE55°- NE 77°). The extension radius of fracturing fracture increases, the vertical fracture height does not change obviously, and the width of fracturing fracture decreases slightly. The larger the interval between fracturing sections is, the smaller the influence radius of fracturing cracks is, fracture radius increases from 27 m to 35 m with the maximum decrease of 2.85 m, and the fracture development radius along the drilling direction is reduced from 15.2 m to 12.8 m. After entering the fracturing stage, the maximum value and average value of the cyclic pressure decreased by about 15.3% and 9.6% respectively, the average step length of the cyclic pressure decreased by about 8.1%. The engineering practice shows that the advanced hydraulic fracturing of hard roof effectively weakens the apparent strength of ground pressure and realizes the weakening of the dynamic disaster of hard roof.