深埋长大隧道岩爆预测与工程防治研究  

Research on rockburst prediction and engineering measures of long and deep-lying tunnels

作　　者：王庆武[1] 巨能攀[1] 杜玲丽[2] 黄健[1] 胡勇[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]西南交通大学交通运输与物流学院,四川成都610031

出　　处：《水文地质工程地质》2016年第6期88-94,100,共8页Hydrogeology & Engineering Geology

基　　金：国家重点基础研究发展计划(973)项目资助(2013CB733202);铁道部重大课题资助(2014G003-D)

摘　　要：岩爆是深埋长大隧道面临的最主要的地质灾害之一,准确的岩爆预测对保障施工过程中人员、设备的安全具有重要意义。以拉林铁路巴玉隧道为研究对象,依据隧道沿线现场调查工作及试验研究成果,评价了工程区岩体的整体性和岩爆倾向性;以工程地质条件为基础,综合分析隧道工程区地应力场环境及邻近工程实测地应力成果,利用工程类比和三维数值反演方法获得隧道工程区初始应力场;选取隧道横断面作平面应变分析,计算获得开挖后隧道沿线围岩二次应力场;最后利用修改后的谷-陶岩爆判据对隧道全段进行岩爆状态预测,结果表明隧道多段具有发生中等或高等岩爆的可能。Rockburst is one of the most important geological hazards in long and deep-lying tunnel engineering. The accurate prediction of rockburst is of great significance in the security of staff and facilities during the engineering construction. The Bayu tunnel of Lasa-Linzhi railway engineering is taken as a research object. The rock integrality and rock burst tendency of the engineering area are evaluated based on the field survey along the tunnel and the indoor experimental results. On the basis of geological conditions, the stress field environment and the measured geostress information of the adjacent projects, we gained the initial geostress field of the whole tunnel area with the methods of engineering analogy and the 3-D numerical inversion. The quadratic stress field characteristics of surrounding rocks along the tunnel was obtained by the plane strain analysis of the selected typical excavation sections. The modified Gu-Tao rockburst prediction criterion was also used to forecast the rockburst state along the tunnel. The results show that several sections of the tunnel have the probability of occurring the secondary or tertiary rockburst.

关 键 词：巴玉隧道 地应力反演 岩爆预测 工程防治 

分 类 号：TU457[建筑科学—岩土工程]