Application of Stress Relieving Method in Geostress Measurement of Roadway Surrounding Area

Aiming at the problem that stress distribution around roadway is unclear and supporting design depending on experience, stress relieving method is presented for roadway around stress testing. We accurately obtained geostress data by using the improved instrument, three points of maximum principal stress is greater than 20 MPa. We introduce the U-shaped steel bracket + channel + anchor reinforcing support way and use numerical simulation to demonstrate. Mine pressure monitoring results show that final top and bottom deformation amount is 0.28 mm/d, two sides deformation amount is 0.17 mm/d, and it is proved that accurately grasping geostress distribution plays an important role in roadway design.