In-Situ Stress Measurement and Its Application to Rock Burst Analysis in Xinbaiyanzhai Tunnel of the Xiangyu Railway
襄渝铁路增建二线--新白岩寨隧道地应力测量及其在岩爆分析中的应用

Using the hydraulic pressure fracturing method, the authors measured the in-situ stresses of Xinbaiyanzhai tunnel whose greatest burial depth is nearly 500 m along the second line of the Xianyu Railway. The results show that the horizontal stress is predominant. The direction of the maximum primary stress is NNW, in good agreement with the result of regional analysis. According to the stress state, the probability of rock burst is discussed.