The invention provides a stope face hard roof ground pulse roof
cutting method. The gob-side entry stope face hard roof ground pulse roof
cutting method comprises the steps that a vertical borehole isformed in the top of a roadway, and the bottom of the borehole extends into a hard rock stratum; a borehole
penetrometer is used for detecting the borehole, and the pressure of the hard rock stratumon roadway surrounding rock is judged in combination with the pressure condition; L-shaped boreholes are formed over
coal pillars on the two sides of a stope face correspondingly, the vertical sections of the boreholes extend downwards from the ground to the 1 / 2 position of the hard rock stratum over the
coal pillars, and the horizontal sections of the boreholes extend to the boundary of the hardrock stratum needing to be subjected to roof
cutting in the advancing direction of the working face; hole openings of the L-shaped boreholes are sealed by using a hole packer, water injection operation is conducted through a waterway connected to a water
injection port, a power supply is switched on, and fracturing is conducted by using shock
waves; and the
shock wave fracturing range is observedthrough a displayer connected to a controller till the two sides of the hard rock stratum in the advancing direction of the whole working face are fractured and
cut off at the same time. According tothe gob-side entry stope face hard roof ground pulse roof cutting method, deviation is not prone to occurring in the detection process, the detection precision is high, meanwhile, the roof cutting speed is high, and safety is good.