Applied Research on Hole Shape of Hole-sharped Pressure Release Support Materiel in High Stress Roadway

In order to solve the unfavorable phenomena basically such as limited support strength, large difficulty of support, serious damage of the surrounding rock disturbance, frequent engineering disasters and higher back repair rate, through the study of the characteristics of mine pressure and the failure mechanism of surrounding rock of Beijing Changgouyu Mine -410 m east two east 15 groove bottom plate, we propose a new support method for hole-sharped pressure release which is suitable for high stress soft rock roadway, and use the finite difference software FLAC^3D to simulate the different hole shapes of hole-sharped pressure release materiels, and analyze the release effect of different hole shapes, which verifies the rationality of the circular pressure relief hole.