基于地应力测试的高地压硬质围岩隧道岩爆分析研究  

High Stress Hard Rock Tunnel Rock Burst Analysis Based on In-situ Stress Measurement

作　　者：向俊宇[1,2] 陈发本 潘世强[1] 巢万里[1] 

机构地区：[1]湖南省交通科学研究院,湖南长沙410075 [2]中南大学,湖南长沙410075 [3]云南省公路科学技术研究院,云南昆明650051

出　　处：《公路工程》2013年第5期79-83,共5页Highway Engineering

基　　金：湖南省交通科技项目(200928);湖南省交通科技项目(201161)

摘　　要：初始应力场对高地压隧道围岩变形和岩爆分析有着重要的控制作用.采用了目前技术较为成熟的空心包体应变计法,成功测量出高黎贡山隧道的原岩地应力,并将该地应力测试成果应用于隧道岩爆预测数值模型中.有限元计算表明：该隧道埋深在400～480 m时有轻微岩爆发生,埋深大于480 m有中等岩爆发生;拱顶是岩爆的危险区域,施工时需格外注意.计算结果和现场岩爆发生位置具有较好的相似性.最后针对该隧道岩爆状况提出了相应的防治对策.The initial stress field plays an important role in the control in the High pressure tunnel surrounding rock deformation and rock burst analysis.This paper successfully measured the original rock stress of the tunnel area by CSIRO strain gauge method.And then the test results was applied in the numerical model of tunnel rock burst prediction.Finite element calculations show that：the tunnel depth of 400 to 480 m have a mild rock burst ;depth greater than 480m have a moderate rock burst and the dome is the rock burst danger zone which is need to pay particular attention to the construction.Calculation results and live rock broke the location of the area of Health has a certain similarity,at last proposed prevention measures corresponding for tunnel rock burst.

关 键 词：地应力测试 应力解除法 硬质围岩 岩爆 有限元 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]