雪峰山公路隧道岩爆问题的分析预测研究
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摘要
雪峰山隧道为上海~瑞丽国道主干线湖南省邵阳~怀化高速公路上最大的控制性工程,全长约7 km,最大埋深约850 m,为典型的长大越岭公路隧道,曾一度担心岩爆问题突出,目前已全线贯通。本次研究通过现场洞壁应力测试、MTS岩石力学特性实验、隧道内地质观测分析并结合课题组以往总结的经验判据(σθ/Rb)对其岩爆问题从岩石材料本身的内在力学机制和外部条件两方面进行综合分析预测得出:围岩岩石材料本身虽具备发生岩爆的内部条件,但最终发生岩爆还是取决于外部应力状况和外部条件,这与实际相符,并为今后类似工程提供了一套研究方法和借鉴作用。
The Xuefeng Mountain Tunnel under construction is the largest controlling project of Shao-Huai Expressway.The length of the tunnel is about 7 km and the largest thickness of its overlay is about 850 m,it is a typical Thru Mountain Long Highway Tunnel,which is worried about its serious rockburst problems.In this paper,by virtue of methods such as the surrounding rock surface stress test,MTS rock mechanics tests and geology observation and analysis etc,and combined with several experience judge methods(σθ/Rb),the comprehensive analysis prediction of rockburst problem from the rock interior mechanics essence and exterior conditon are given.Rock itsself contains the conditon of taking place rockburst,but last rockburst depends on the exterior stress state and conditon.This is in accordance with practice,and also provides a set of research method and an good example for other similor engineerings.
The Xuefeng Mountain Tunnel under construction is the largest controlling project of Shao-Huai Expressway.The length of the tunnel is about 7 km and the largest thickness of its overlay is about 850 m,it is a typical Thru Mountain Long Highway Tunnel,which is worried about its serious rockburst problems.In this paper,by virtue of methods such as the surrounding rock surface stress test,MTS rock mechanics tests and geology observation and analysis etc,and combined with several experience judge methods(σθ/Rb),the comprehensive analysis prediction of rockburst problem from the rock interior mechanics essence and exterior conditon are given.Rock itsself contains the conditon of taking place rockburst,but last rockburst depends on the exterior stress state and conditon.This is in accordance with practice,and also provides a set of research method and an good example for other similor engineerings.
引文
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[10]靳晓光,王兰生,李晓红.地下工程围岩二次应力场的现场测试与监测[J].岩石力学与工程学报,2002,21(5).
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[2]侯发亮,等.岩爆成因再分析及烈度划分探讨[A].第三界全国岩石动力学学术会议论文集[C].武汉:武汉测绘科技大学出版社,1992.
[3]陶振宇.高地应力区的岩爆及其判别[J].人民长江,1987,(5).
[4]贾愚如.水工地下洞室中的岩爆机制与判据[J].水力发电,1990,(6).
[5]王元汗,等.岩爆预测的模糊数学综合评判方法[J].岩石力学与工程学报,1998,17(5).
[6]Kisybinski A.Bursting liability indices of coal IntJ.Rock Mech[J].Min Sci&Geomech Abstr,1981,18(4).
[7]Hoek E,Brown E T.Underground excavation in Rock[M].London:Institute of Mining and Metallurgy,1980.
[8]谢和平,陈忠辉.岩石力学[M]北京:科学出版社,2003.
[9]王兰生,等.深埋长隧道高地应力与围岩稳定问题——“川藏公路二郎山隧道高地应力测试、监测及围岩稳定性分析与工程措施”专题研究报告[R].成都理工大学,2002.
[10]靳晓光,王兰生,李晓红.地下工程围岩二次应力场的现场测试与监测[J].岩石力学与工程学报,2002,21(5).
[11]徐进.隧道洞壁应力测试方法及其装置(P).中国专利号:200610022359.
[12]靳晓光,王兰生,李天斌.地应力测量的应力恢复法试验和数值模拟研究[J].成都理工学院学报,1999,26(3).
[13]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.
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