深埋特长隧道水压致裂法地应力测量与分析

Test and Analysis of In-situ Stress of Deep Buried Long Tunnel under Hydraulic Fracture

对于深埋特长隧道,岩体的地应力状态直接关系到工程的稳定性。准确地测量地应力,对于预测岩爆等工程地质灾害有着重大意义。基于水压致裂法和室内岩体力学试验,研究了隧道围岩地应力状态,最后基于隧道地应力对岩爆发生的部位和等级进行了预测,为隧道的开挖与支护方案设计提供依据。

The in-situ stress conditions of rock mass is directly related to the stability of deep buried tunnels. Accurate measurement of in-situ stress is of great significance for predicting engineering geological hazards such as rock burst. Being based on the hydraulic fracturing method and the rock mechanics test,the stress state of tunnel surrounding rock has been studied. Finally,the location and grade of the rock burst have been predicted on the basis of the in-situ stress of the tunnel,and basis have been provided for the design of tunnel excavation and supporting scheme.