Tunnel Ground Stress Test and Rock Burst Prediction Based on Hydraulic Fracturing Method

摘要

The hydraulic fracturing method is a common method to measure the ground stress. This article describes the principles of the hydraulic fracturing method, studies the distribution and the value of the ground stress in a tunnel area with the hydraulic fracturing method, and predicts rock burst by using the Russenes discriminance and the Turchaninov discriminance. The results show that the maximum horizontal stress is between 4.7 MPa and 11.1 MPa, and the minimum horizontal stress is between 4.0 MPa and 8.0 MPa. The maximum horizontal stress direction of the drilling is between N63°W and N72°W, and it is not conducive to the stability of the tunnel surrounding rocks because the large angle intersection of the tunnel axis direction and the maximum horizontal stress direction.