公路隧道围岩稳定性在隧道施工过程中至关重要，围岩失稳可使水电硐室、交通隧道、矿山巷道等遭受破坏，损坏生产设备，威胁工程人员的人身安全，因此开展围岩稳定性研究，对地下空间的有效合理开发、施工优化和确保工程顺利进行，均有十分重要的意义。 本文以秦岭终南山公路隧道为依托工程，隧道埋深大(800.0m)，线路长(18.02×2km)，地质条件复杂，地层岩性主要为混合片麻岩，脆性大，且处在高地应力水平，易发生岩爆动力灾害，且易产生分区破裂化现象。 本文从国内外对深部的定义和高地应力下深部岩体力学特性研究现状入手，引出岩爆和分区破裂化两种特征科学现象，结合终南山隧道工程实例，从岩石MTS-AE试验、现场声发射与钻孔窥视监测试验和三维数值模拟(FLAC3D)三个方面对岩爆问题进行研究，探索出了深部岩爆孕育的“时间-空间-强度”规律和深埋隧道围岩的分区破裂化现象。本文并对圆形隧道应力重分布进行分析，得出隧道顶部和底部易出现应力集中现象，满足发生岩爆的两个条件：①岩体内储备有足够的弹性应变能；②引起破坏的应力集中。采用声发射(Acoustic Emission，AE)预报技术进行了综合预测和分析，得出岩爆发生时的声发射特征与动态演化规律。利用FLAC3D数值分析软件进行数值模拟分析得出，在风道施工过程中，距离主隧道越近的位置，附近岩体受到的扰动就越大，扰动范围与原先隧道施工过程扰动范围重合，并继续向岩体深处延伸，风道顶部下沉较大。岩爆是一种能量的释放，既有渐变过程，也有突变过程，岩爆的发生与开挖方式及支护措施直接相关，因此，开展岩爆防治对策的研究为高地应力下深埋地下工程岩爆现象的预防预报提供可靠的依据，同时具有重要的理论和工程应用价值。

Stability of the surrounding rock is crucial in the process of the highway tunnel construction,once surrounding rock instability,it can damage equipments in the room of hydroelectric station,traffic tunnel and mining gallery.Surrounding rock instability also threaten engineers′personal security.Therefore,research tunnel stability have significance in underground space for the effective and rational development,optimization and construction to ensure the project smoothly conducted. This paper depends on The Qin Ling Zhong Nan mountain highway tunnel,the tunnel deeply buried(800.0m),longly lines(18.02×2km),and complex geological conditions.Mixed gneiss which is brittleness and in high geo-stress level is the main rock in the tunnel.It is prone to accour dynamic rock burst and zonal fracturing phenomenon. Based on the definition of deep and under high geo-stress deep rock masses mechanical properties research at home and abroad,this paper quo two characteristic scientific phenomenona,which are rock burst and zonal fracturing phenomenon.With Zhong Nan mountain tunnel project overview,the paper from MTS-AE rock mechanics experiment,acoustic emission and drilling in the site and numerical analysis using the FLAC3D numberical analysis software three aspects to research rock burst problem,discovering the law of the “time-space-strength”in deep rock burst and exploring zonal fracturing phenomenon in the deep rock masses.This paper conclud the top and the bottom appear the area of high stress on the analysis of secondary stress in circular tunnel,which are met two conditions of rock burst occurrence:①rock body reserves sufficient elastic strain energy;②damage caused by the stress concentration.Conclud rock burst acoustic emission characteristics and the dynamic evolution by acoustic emission forecasting technology.From the numerical analysis using the FLAC3D numerical analysis software,in the process of tunnel ventilation construction,the more near to main tunnel place,the bigger disturbance on rock nearby,the more subsidence tunnel ventilation upper stratum,but the sphere of disturbance is same to the former tunnel constrution′s,and continuously reache to the rock depth.Rock burst is a release of energy,both gradual process and mutation process.Rock burst occurrence directly related to excavation and support measures,so carried out rock burst control measures provide a reliable basis with the phenomenon of rock burst prevention in high geo-stress deep rock masses,and also has important in theoretical and engineering application values.