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根据在浙江苍岭隧道施工中发生的岩爆,通过现场地质观测资料,具体地分析了其形成的规模、位置、诱发因素以及地质条件,从地质工程的角度,对岩爆发生地段隧道的岩石组成、地质构造、地应力特征以及地下水情况进行了探讨,发现在苍岭隧道施工中发生岩爆的岩石具有岩体结构面发育适中、弹性模量大、P波波速高、地质构造简单、现代水平构造应力强且主压应力轴σ1大角度相交于隧道中轴线和地下水不发育的特征,并在此基础上,提出了掌子面喷水、布设释放地应力锚杆、减少隧道壁聚能结构等有效的岩爆防治措施。
According to the rock burst occurred during the construction of Cangling Tunnel in Zhejiang Province, through the on-site geological observation data, the formation scale, location, induced factors and geological conditions are analyzed in detail. From the perspective of geological engineering, Composition, geologic structure, geostress characteristics and groundwater conditions are discussed. It is found that rocks with rock burst in Cangling Tunnel have the characteristics of moderately developed rock mass structural plane, large elastic modulus, high P wave velocity, simple geological structure and modern The horizontal tectonic stress is strong and the principal compressive stress axis σ1 intersects at a large angle to the undeveloped axis in the tunnel and the groundwater is not developed. On the basis of this, Structure and other effective rock burst control measures.