中天山隧道地应力测量及岩爆预测研究
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摘要
在勘察设计阶段研究越岭隧道区域内的现代地应力特征,可以为越岭隧道选线设计、隧道断面设计及隧道二次衬砌设计提供依据,并揭示出施工中可能发生岩爆的具体段落。介绍了应用钻孔内水压致裂法进行地应力测试,确定出隧道通过区岩体的原地应力大小和方向。根据原地应力测量成果,综合分析钻孔附近地层地应力的基本特征,结合隧道通过区各类型地层的工程地质特征、物理力学性质,分析隧道开挖中各类地层发生岩爆的可能性。施工情况揭示对隧道地应力的测量及岩爆的预测是正确的,对于岩爆的预防起到了积极的作用。
At the survey and design stage,making a study of the modern features of the crustal stress in the region of an uphill tunnel may provide technical grounds for the design of routing an uphill tunnel,its cross-section,and the 2nd lining of the tunnel,with the specific likely rock burst sections during the construction exposed.In the paper described is the application of the stress test of hydraulic fracturing in borehole conducted to determine the stress magnitude and directions of the rock mass in situ of the region through which the tunnel goes.By analyzing the results obtained from the survey,making comprehensive analyses of the basic characteristics of the stress of the formation near the borehole,and taking account of the features of the engineering geology,physical and mechanical properties of the various strata of the region through which the tunnel goes,the possibilities of rock burst in different strata during the excavation of the tunnel are analyzed.Our construction practice shows that both the stress measurement and rock burst prediction are correct,which play a positive role in the prediction of rock burst.
At the survey and design stage,making a study of the modern features of the crustal stress in the region of an uphill tunnel may provide technical grounds for the design of routing an uphill tunnel,its cross-section,and the 2nd lining of the tunnel,with the specific likely rock burst sections during the construction exposed.In the paper described is the application of the stress test of hydraulic fracturing in borehole conducted to determine the stress magnitude and directions of the rock mass in situ of the region through which the tunnel goes.By analyzing the results obtained from the survey,making comprehensive analyses of the basic characteristics of the stress of the formation near the borehole,and taking account of the features of the engineering geology,physical and mechanical properties of the various strata of the region through which the tunnel goes,the possibilities of rock burst in different strata during the excavation of the tunnel are analyzed.Our construction practice shows that both the stress measurement and rock burst prediction are correct,which play a positive role in the prediction of rock burst.
引文
[1]中铁第一勘察设计院集团有限公司.南疆铁路吐鲁番至库尔勒段增建二线中天山隧道工程地质勘察报告[R].西安:中铁第一勘察设计院集团有限公司,2007
[2]中国地震局地壳应力研究所,日本电力中央研究所.水压致裂裂缝的形成和扩展研究[M].北京:地震出版社,1999:82
[3]马秀敏.新疆精伊霍铁路北天山越岭深埋特长隧道区水压致裂地应力测量与隧道工程稳定性研究[D].北京:中国地质科学院,2006
[4]中国地震局地壳应力研究所.南疆线吐库段增建二线中天山隧道地应力测试分析报告[R].北京:中国地震局地壳应力研究所,2008
[5]巨小强.木寨岭隧道越岭区区域地应力特征分析及应用[J].铁道勘察,2010(2):33-35
[6]E.Hoek,E.T.Brown.岩石地下工程[M].连志升译.北京:冶金工业出版社,1986
[7]谷明成,何发亮,陈成宗.秦岭隧道岩爆的研究[J].岩石力学与工程学报,2002,21(9):1324-1329
[8]蔡美峰,王金安,王双红.玲珑金矿深部开采岩体能量分析与岩爆综合预测[J].岩石力学与工程学报,2001,20(1):38-42
[2]中国地震局地壳应力研究所,日本电力中央研究所.水压致裂裂缝的形成和扩展研究[M].北京:地震出版社,1999:82
[3]马秀敏.新疆精伊霍铁路北天山越岭深埋特长隧道区水压致裂地应力测量与隧道工程稳定性研究[D].北京:中国地质科学院,2006
[4]中国地震局地壳应力研究所.南疆线吐库段增建二线中天山隧道地应力测试分析报告[R].北京:中国地震局地壳应力研究所,2008
[5]巨小强.木寨岭隧道越岭区区域地应力特征分析及应用[J].铁道勘察,2010(2):33-35
[6]E.Hoek,E.T.Brown.岩石地下工程[M].连志升译.北京:冶金工业出版社,1986
[7]谷明成,何发亮,陈成宗.秦岭隧道岩爆的研究[J].岩石力学与工程学报,2002,21(9):1324-1329
[8]蔡美峰,王金安,王双红.玲珑金矿深部开采岩体能量分析与岩爆综合预测[J].岩石力学与工程学报,2001,20(1):38-42
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