锦屏二级水电站引水隧洞TBM开挖方案对岩爆风险影响研究  

EFFECT OF EXCAVATION SCHEMES OF TBM ON RISK OF ROCK BURST OF LONG TUNNELS AT JINPING Ⅱ HYDROPOWER STATION

作　　者：吴世勇 周济芳[1] 陈炳瑞[2] 黄满斌[3] 

机构地区：[1]雅砻江流域水电开发有限公司,四川成都610051 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [3]沈阳铁道勘察设计院有限公司,辽宁沈阳110013

出　　处：《岩石力学与工程学报》2015年第4期728-734,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家科技支撑计划项目(2011BAZ03221B05);国家自然科学基金委主任基金项目(11355001)

摘　　要：为了提高施工效率,降低现场施工人员和设备的风险,锦屏二级水电站1#,3#引水隧洞采用大断面TBM进行施工。超大埋深TBM全断面施工,对于等级较强的岩爆,仍然可能会给TBM设备带来一定伤害。为此,通过微震实时监测和数值分析等手段,开展TBM施工速度、导洞施工等TBM开挖方案对岩爆风险的影响研究。结果表明,降低TBM施工速率,有利于降低岩爆发生的风险;导洞施工+TBM联合施工对于极强岩爆风险的防范是十分有利的。研究成果可为TBM安全快速掘进提供重要的参考价值,也将为其他工程提供借鉴,具有重要的工程价值。To improve the efficiency of construction and reduce the risk of personnel and equipment on construction site,the large-section Tunnel Boring Machine(TBM) was used in digging the diversion tunnels #1,#3 at Jinping II hydropower station. When a strong occurs,the full-section TBM construction in deep underground,may bring damage to TBM. Therefore,through the real time microseismic monitoring and numerical analysis,the influence of excavation scheme of TBM and the construction of pilot tunnel on the risk of rock burst was studied. Lower speed of construction progress was found to be able to reduce the risk of rock burst. The excavation of pilot tunnel together with tunneling with TBM was found to be beneficial to prevent the strong rock burst.

关 键 词：隧道工程 深埋长隧洞 TBM 开挖方案 岩爆 演化规律 

分 类 号：TV554[水利工程—水利水电工程]