基于应力判据法的施工期岩爆预测研究
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摘要
九岭山隧道为单洞双线铁路隧道,全长15 371 m,最大埋深约862 m。隧道所处地形起伏大,隧道穿越地层较复杂,九岭山隧道开挖后,深埋段岩体因受高围压作用,产生岩爆现象。通过工程实测地应力成果,基于应力解除法的二次应力测试,并采用应力判据法,对掌子面前方进行岩爆预测,结果分析表明:DK1690+130～DK1690+500为中等岩爆区域;卢森、王元汉、王兰生等应力判据的结论更适合九岭隧道岩爆情况,建议在岩爆预测中为主要岩爆发生判别依据。
Jiuling Mountain Tunnel is a single-hole and double-track tunnel with a total length of 15 371 m and a maximum buried depth is about 862 m. The topography of the tunnel fluctuates, and the tunnel passes through the complex strata.After the Jiuling Mountain Tunnel was excavated, the surrounding rock in the deep-buried section was affected by the high confining pressure and the rockburst occurred. Based on the ground stress measured by the stress relief method, the secondary stress test and the stress criterion method were used to predict the rockburst in front of excavating face. The results show that: the part of DK1690 + 130 ～DK1690 + 500 is a medium rockburst region. The conclusions of stress criteria from Russense, Wang Yuanhan,and Wang Lansheng are more suitable for the rockburst situation in the Jiuling Mountain Tunnel, and the paper suggests that the main criteria for rockburst should be identified in rockburst forecasting.
Jiuling Mountain Tunnel is a single-hole and double-track tunnel with a total length of 15 371 m and a maximum buried depth is about 862 m. The topography of the tunnel fluctuates, and the tunnel passes through the complex strata.After the Jiuling Mountain Tunnel was excavated, the surrounding rock in the deep-buried section was affected by the high confining pressure and the rockburst occurred. Based on the ground stress measured by the stress relief method, the secondary stress test and the stress criterion method were used to predict the rockburst in front of excavating face. The results show that: the part of DK1690 + 130 ～DK1690 + 500 is a medium rockburst region. The conclusions of stress criteria from Russense, Wang Yuanhan,and Wang Lansheng are more suitable for the rockburst situation in the Jiuling Mountain Tunnel, and the paper suggests that the main criteria for rockburst should be identified in rockburst forecasting.
引文
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[2]吴德兴,杨健.苍岭特长公路隧道岩爆预测和工程对策[J].岩石力学与工程学报,2005(21):3965-3971.
[3]符文熹,任光明,聂德新,等.深埋长隧道岩爆的预测预报及防治初探[J].地质灾害与环境保护,1999(1):25-28.
[4]姜繁智,向晓东,朱东升.国内外岩爆预测的研究现状与发展趋势[J].工业安全与环保,2003(8):19-22.
[5]景锋,边智华,杨火平,等.深埋长隧道地应力测量与岩爆预测分析[J].人民长江,2008(1):80-82,93.
[6]陶振宇,潘别桐.岩石力学原理与方法[M].武汉:中国地质大学出版社,1991:51-53.
[7]王元汉.岩石类脆性材料的压剪断裂分析[C]//中国岩石力学与工程学会第三次大会.北京:中国科学技术出版社,1994:54-162.
[8]张志强,关宝树,翁汉民.岩爆发生条件的基本分析[J].铁道学报,1998(4):82-85.
[9]徐林生,王兰生,李永林.岩爆形成机制与判据研究[J].岩土力学,2002(3):300-303.
[10]刘允芳,尹健民,刘元坤.深钻孔套芯应力解除法的测量技术和实例[J].长江科学院院报,2008(5):1-6.
[11]吴家龙.弹性力学[M].上海:同济大学出版社,1990:79-81.
[12]国家铁路局.铁路隧道设计规范:TB 10003-2016[S].北京:中国铁道出版社,2017:22.
[13]中华人民共和国水利部.水利水电工程岩石试验规程:SL264-2001[S].北京:中国水利水电出版社,2001:44-48.