The rock stress measurement by trepanning stress relief method in Longmenshan mining region

Measuring rock stress is important for optimizing mining sequence and roadway design of Longmenshan Mining region. Trepanning stress relief method is applied to measure the rock stress of Longmenshan mining region. Stress size, orientation, and their distribution law are obtained. The results show that rock stress increases with the depth. The horizontal stress is the maximum stress. The direction of the principal stress conforms to roadway alignment. The roadway design is reasonable.