引汉济渭工程秦岭区深埋隧洞地应力场研究
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摘要
为了研究引汉济渭工程中秦岭深埋隧洞地应力分布规律,以便为隧洞设计及施工提供依据,在重要工程部位进行了三维水压致裂法的地应力测试工作。测试结果表明:测试部位最大水平主应力为19.5～31.4 MPa,大于自重应力,说明地区是以水平应力场为主导;最大水平主应力方向集中为NW～EW向。结合实测结果及隧洞围岩力学参数可知,工程测试区域隧洞洞身段属于高～极高应力区。最后,从地应力的角度讨论了隧洞轴线的选择,并采用常用的Russenes判别法和Turchaninov判别法对洞室围岩进行了施工期岩爆预测分析。
To acquire distribution of the ground stress at water diversion Project from the Han River to the Wei River,in order to provide basis for design and construction,3-dimension hydro-fracturing tests are carried out at the major project locations.The results reveal that the value of the maximum horizontal principal stress is larger than gravity stress along the tunnel axis.Horizontal stress field is dominated in this area,the maximum horizontal principal stress is from 19.5 to 31.4 MPa,Which is more than self weight stress The orientation is mainly from NW to EW direction.Considering the measured results and mechanical parameters of surrounding rock,it shows that the stress belongs to high or extremely high in engineering test area.In the end,this paper analyzes and forecasts rock burst of tunnel surrounding rock during construction by Russenes and Turchaninov discriminants,and it is useful for the project,which can provide the basis for engineering design and construction.
To acquire distribution of the ground stress at water diversion Project from the Han River to the Wei River,in order to provide basis for design and construction,3-dimension hydro-fracturing tests are carried out at the major project locations.The results reveal that the value of the maximum horizontal principal stress is larger than gravity stress along the tunnel axis.Horizontal stress field is dominated in this area,the maximum horizontal principal stress is from 19.5 to 31.4 MPa,Which is more than self weight stress The orientation is mainly from NW to EW direction.Considering the measured results and mechanical parameters of surrounding rock,it shows that the stress belongs to high or extremely high in engineering test area.In the end,this paper analyzes and forecasts rock burst of tunnel surrounding rock during construction by Russenes and Turchaninov discriminants,and it is useful for the project,which can provide the basis for engineering design and construction.
引文
[1]刘允芳,钟作武,汪洁.水压致裂法三维地应力测量成果计算与分析的探讨[J].岩石力学与工程学报,2002,21(6):833-838.(Liu Yunfang,Zhong Zuowu,Wang Jie.Interpretation of 3-dimensional geo-stress re-sults measured by hydraulic fracturing technique[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(6):833-838.(in Chinese))
[2]徐文龙.陕西北秦岭中段构造应力场的初步研究[J].地震地质,1991,13(2):161-172.(Xu Wenlong.A study on tectonic stress field on the middle section ofno～heru Qinling mountain in Shaanxi Province[J].Seismology and Geology,1991,13(2):161-172.(inChinese))
[3]韩金良,吴树仁,谭成轩,等.东秦岭东江口花岗岩体水压致裂法与AE法地应力测量对比研究[J].岩石力学与工程学报,2007,26(1):81-86.(Han Jinliang,Wu Shuren,Tan Chengxuan,et a1.Studies on geo-tressby comparing result of AE method with that of hydraulicfracturing technique in Dongiiangkou granite in east ofQiniing[J].Chinese Journal of Rock Mechanics and En-gineering,2007,26(1):81-86.(in Chinese))
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[5]李立民.秦岭输水隧洞的岩爆预测[J].铁道勘察,2007,(3):90-92.(Li Limin.Prediction for rock burstin water tunnel of Qinling mountain[J].Railway Investi-gation and Surveying,2007,(3):90-92.(in Chinese))
[6]孟祥连,宋丙林,毛建安.西康线秦岭特长隧道地应力测试方法及其应用:铁路工程地质实例[M].北京:中国铁道出版社,2002.(Meng Xianglian,SongBinglin,Mao Jian an.Methods of geo-stress and its ap-plication to the Qinling extra along tunnel district alongthe Xi’an-Ankang railway:cases of railway engineeringgeology[M].Beijing:China Railway Publishing House,2002.(in Chinese)).
[7]郭喜峰,尹健民,李永松,等.引汉济渭工程黄三隧洞地应力测试研究[J].地下空间与工程学报,2010,6(增2):1 629-1 631,1635.(Guo Xifeng,Yin Jian-min,Li Yongsong,et a1.Study on crustal stress meas-urement at Huangsan tunnel of Hanjiang-Weihe Riverdiversion project[J].Chinese Journal of UndergroundSpace and Engineering,2010,6(Supp.2):1 629-1631.(in Chinese))
[8]徐彦举,张连吉,肖军.岩爆有关问题的研究现状[J].西部探矿工程,2008,(2):98-111.(Xu Yanju,Zhang Lianji,Xiao Jun.Research of rock burst[J].West-China Exploration Engineering,2008,(2):98-111.(in Chinese))
[9]谷成明,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.(GuMingcheng,He Faliang,Chen Chengzong.Research ofrock burst in Qinling tunnel[J].Chinese Journal ofRock Mechanics and Engineering,2002,21(9):1 324-1 329.(in Chinese))
[10]郭雷,李夕兵,岩小明.岩爆研究进展及发展趋势[J].采矿技术,2006,6(l):16-20.(Guo Lei,Li Xib-ing,Yan Xiaoming,Research progress and developmenttrend of rock burst[J].Mining Technology,2006,6(l):16-20.(in Chinese))
[11]李庶林,冯夏庭.深井硬岩岩爆倾向性评价[J].东北大学学报,2001,22(l):60-63.(Li Shulin,Feng Xiat-ing.Evaluation of rock burst proneness in a deep hardrock mine[J].Journal of Northeastern University,2001,22(l):60-63.(in Chinese))
[12]中华人民共和国国家标准编写组.工程岩体分级标准(GB502l8-94)[S].北京:中国计划出版社,1995.(The National Standards Compilation Group of People’sRepublic of China.Standard for engineering classifica-tion of rock masses(GB 502l8-94)[S].Beijing:ChinaPlanning Press,1995.(in Chinese))
[2]徐文龙.陕西北秦岭中段构造应力场的初步研究[J].地震地质,1991,13(2):161-172.(Xu Wenlong.A study on tectonic stress field on the middle section ofno～heru Qinling mountain in Shaanxi Province[J].Seismology and Geology,1991,13(2):161-172.(inChinese))
[3]韩金良,吴树仁,谭成轩,等.东秦岭东江口花岗岩体水压致裂法与AE法地应力测量对比研究[J].岩石力学与工程学报,2007,26(1):81-86.(Han Jinliang,Wu Shuren,Tan Chengxuan,et a1.Studies on geo-tressby comparing result of AE method with that of hydraulicfracturing technique in Dongiiangkou granite in east ofQiniing[J].Chinese Journal of Rock Mechanics and En-gineering,2007,26(1):81-86.(in Chinese))
[4]谭成轩,孙炜锋,张春山,等.深切峡谷地区地壳浅表层地应力状态变化分析[J].地球物理学进展,2007,22(4):1 353-1 359.(Tan Chengxuan,Sun Weifeng,Zhang Chunshan,et a1.Analysis of variation of crustalstress states at the shallow part of upper crust in deep-cut valley region[J].Progress in Geophysics,2007,22(4):1 353-1 359.(in Chinese))
[5]李立民.秦岭输水隧洞的岩爆预测[J].铁道勘察,2007,(3):90-92.(Li Limin.Prediction for rock burstin water tunnel of Qinling mountain[J].Railway Investi-gation and Surveying,2007,(3):90-92.(in Chinese))
[6]孟祥连,宋丙林,毛建安.西康线秦岭特长隧道地应力测试方法及其应用:铁路工程地质实例[M].北京:中国铁道出版社,2002.(Meng Xianglian,SongBinglin,Mao Jian an.Methods of geo-stress and its ap-plication to the Qinling extra along tunnel district alongthe Xi’an-Ankang railway:cases of railway engineeringgeology[M].Beijing:China Railway Publishing House,2002.(in Chinese)).
[7]郭喜峰,尹健民,李永松,等.引汉济渭工程黄三隧洞地应力测试研究[J].地下空间与工程学报,2010,6(增2):1 629-1 631,1635.(Guo Xifeng,Yin Jian-min,Li Yongsong,et a1.Study on crustal stress meas-urement at Huangsan tunnel of Hanjiang-Weihe Riverdiversion project[J].Chinese Journal of UndergroundSpace and Engineering,2010,6(Supp.2):1 629-1631.(in Chinese))
[8]徐彦举,张连吉,肖军.岩爆有关问题的研究现状[J].西部探矿工程,2008,(2):98-111.(Xu Yanju,Zhang Lianji,Xiao Jun.Research of rock burst[J].West-China Exploration Engineering,2008,(2):98-111.(in Chinese))
[9]谷成明,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.(GuMingcheng,He Faliang,Chen Chengzong.Research ofrock burst in Qinling tunnel[J].Chinese Journal ofRock Mechanics and Engineering,2002,21(9):1 324-1 329.(in Chinese))
[10]郭雷,李夕兵,岩小明.岩爆研究进展及发展趋势[J].采矿技术,2006,6(l):16-20.(Guo Lei,Li Xib-ing,Yan Xiaoming,Research progress and developmenttrend of rock burst[J].Mining Technology,2006,6(l):16-20.(in Chinese))
[11]李庶林,冯夏庭.深井硬岩岩爆倾向性评价[J].东北大学学报,2001,22(l):60-63.(Li Shulin,Feng Xiat-ing.Evaluation of rock burst proneness in a deep hardrock mine[J].Journal of Northeastern University,2001,22(l):60-63.(in Chinese))
[12]中华人民共和国国家标准编写组.工程岩体分级标准(GB502l8-94)[S].北京:中国计划出版社,1995.(The National Standards Compilation Group of People’sRepublic of China.Standard for engineering classifica-tion of rock masses(GB 502l8-94)[S].Beijing:ChinaPlanning Press,1995.(in Chinese))
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