地应力与岩石弹性模量关系试验研究
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摘要
在北京某深孔原岩应力测量和原岩应力测量段同等深度单轴及不同围压下的三轴岩石力学试验的基础上,结合统计的钻孔岩体结构参数,分析了原岩应力测量段深度处修正前、后的岩石弹性模量,进而探讨了地应力与岩石弹性模量间关系。结果表明,在花岗岩中,主应力大小与修正前、后的岩石弹性模量间均呈正相关关系,而在灰岩中,主应力大小与修正前、后岩石弹性模量间的关系不明确,需要进一步研究;在花岗岩中,主应力大小与修正后的岩石弹性模量间的相关性系数高于主应力大小与修正前的岩石弹性模量间的相关性系数;各向同性高的岩体(如花岗岩),实测地应力大小与岩石力学试验结果相关性好,而各向异性大的岩体(如沉积岩),实测地应力大小与岩石力学试验结果相关性较差。
An in-situ stress measurement and a rock mechanical test under different confining pressures and statistics of structure properties of rock mass in a deep borehole in Beijing have been carried out to research the relation between in-situ stress and rock elastic modulus thoroughly.The results are as follows: the relation between principal stress magnitude and rock elastic modulus shows a positive correlation in granite,but not clear in limestone.In granite,the relative coefficient between principal stress magnitude and revised rock elastic modulus exceeds the relative coefficient between principal stress magnitude and rock elastic modulus.The correlation between in-situ crustal stress magnitude and results of rock mechanical test in high-isotropic rock(e.g.granite) is high,but the correlation in low-isotropic rock(e.g.sedimentary rock) is low.
An in-situ stress measurement and a rock mechanical test under different confining pressures and statistics of structure properties of rock mass in a deep borehole in Beijing have been carried out to research the relation between in-situ stress and rock elastic modulus thoroughly.The results are as follows: the relation between principal stress magnitude and rock elastic modulus shows a positive correlation in granite,but not clear in limestone.In granite,the relative coefficient between principal stress magnitude and revised rock elastic modulus exceeds the relative coefficient between principal stress magnitude and rock elastic modulus.The correlation between in-situ crustal stress magnitude and results of rock mechanical test in high-isotropic rock(e.g.granite) is high,but the correlation in low-isotropic rock(e.g.sedimentary rock) is low.
引文
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[20]陈彭年,陈宏德,高莉青.世界地应力实测资料汇编[M].北京:地震出版社,1990.
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[22]尤明庆.岩石试样的杨氏模量与围压的关系[J].岩石力学与工程学报,2003,22(1):53-60.YOU Ming-qing.Effect of confining pressure on theYoung’s modulus of rock specimen[J].Chinese Journalof Rock Mechanics and Engineering,2003,22(1):53-60.
[23]曹庆林,周慧.节理岩体变形特性的参数研究及等效弹模的数值确定[J].冶金矿山设计与建设,1996,(2):3-7.CAO Qing-lin,ZHOU Hui.Numerically determining theequivalent modulus of jointed rock mass based on theparametric study on its compressibility[J].Metal MineDesign and Construction,1996,(2):3-7.
[24]HUANG T H,CHANG C S,YANG Z Y.Elastic modulusfor fractured rock mass[J].Rock Mechanics and RockEngineering,1995,28(3):135-144.
[2]孙叶,谭成轩.区域地壳稳定性定量化评价[M].北京:地质出版社,1998.
[3]陈庆宣,王维襄,孙叶,等.岩石力学与构造应力场[M].北京:地质出版社,1998.
[4]孙叶,谭成轩,孙炜锋,等.煤瓦斯突出研究方法探索[J].地质力学学报,2007,13(1):7-14.SUN Ye,TAN Cheng-xuan,SUN Wei-feng,et al.Anapproach to the study of coal and gas outburst[J].Journalof Geomechanics,2007,11(1):17-14.
[5]谭成轩,孙叶,王连捷.地应力测量值得注意的若干问题[J].地质力学学报,2003,9(3):275-280.TAN Cheng-xuan,SUN Ye,WANG Lian-jie.Someproblems of in-situ crustal stress measurements[J].Journal of Geomechanics,2003,9(3):275-280.
[6]谭成轩,孙玮烽,孙叶,等.地应力测量及其地下工程应用的思考[J].地质学报,2006,80(10):1627-1632.TAN Chen-xuan,SUN Wei-feng,SUN Ye,et al.Aconsideration on in-situ crustal stress measuring and itsunderground engineering application[J].Acta GeologicaSinica,2006,80(10):1627-1632.
[7]白世伟,李光煜.二滩水电站坝区岩体应力场研究[J].岩石力学与工程学报,1982,1(1):45-56.BAI Shi-wei,LI Guang-yu.Study on stress field of Ertanhydroelectric station[J].Chinese Journal of RockMechanics and Engineering,1982,1(1):45-56.
[8]朱焕春,陶振宇.不同岩石中地应力分布[J].地震学报,1994,16(1):49-63.ZHU Huan-chun,TAO Zhen-yu.The distribution of thein-situ stress in different rocks[J].Acta SeismologicaSinica,1994,16(1):49-63.
[9]景锋,盛谦,张勇慧,等.不同地质成因岩石地应力分布规律的统计分析[J].岩土力学,2008,29(7):1877-1883.JING Feng,SHENG Qian,ZHANG Yong-hui,et al.Statistical analysis of geostress distribution laws fordifferent rocks[J].Rock and Soil Mechanics,2008,29(7):1877-1883.
[10]赵德安,陈志敏,蔡小林,等.中国地应力场分布规律统计分析[J].岩石力学与工程学报,2007,26(6):1265-1271.ZHAO De-an,CHEN Zhi-min,CAI Xiao-lin,et al.Analysis of distribution of geostress in China[J].ChineseJournal of Rock Mechanics and Engineering,2007,26(6):1265-1271.
[11]ZOBACK M D,TSUKARA H,HICKMAN S.Stressmeasurements at depth in the vicinity of the San Andreasfault-implications for the magnitude of shear stress atdepth[J].J.Geophys.Res.,1980,85:6157-6173.
[12]EVANS K F.Appalachian stress study.Regional scalestress variations and their relation to structure andcontemporary tectonics[J].J.Geophys.Res.,1989,94:17619-17645.
[13]MARTIN C D.Characterizing in-situ stress domains atthe AECL underground research laboratory[J].CanadianGeotechnical Journal,1990,27:631-646.
[14]苏生瑞,黄润秋,王士天.断裂构造对地应力场的影响及其工程应用[M].北京:科学出版社,2002.
[15]陈群策,李方全.对地应力尺寸效应的讨论[C]//谢富仁,陈群策,崔效锋,等编.中国大陆地壳应力环境研究.北京:地质出版社,2003.
[16]蔡美峰,王双红.地应力状态与围岩性质的关系研究[J].中国矿业,1997,6(6):38-41.CAI Mei-feng,WANG Shuang-hong.Relation betweenground stress behavior and properties of surroundingrock[J].China Mining Magazine,1997,6(6):38-41.
[17]AITMATOV I T,VDOVIN K D,KOJOGULOV K C H,et al.State of stress in rock and rock-burst inSeismicactive folded areas[DB/OL].Canada:International Society for Rock Mechanics[1987-08-30].http://www.onepetro.org/mslib/servlet/onepetropreview?id=ISRM-6CONGRESS-1987-139
[18]韩嵩.深部地应力环境对砂岩力学性质的影响[J].矿业研究与开发,2007,27(2):16-31.HAN Song.The influences of deep in-situ stress field onmechanical properties of sandstone[J].Mining Researchand Development,2007,27(2):16-31.
[19]HAIMSON B C,CORNET F H.ISRM suggestedmethods for rock stress estimation—Part 3:Hydraulicfracturing(HF)and/or hydraulic testing of pre-existingfractures(HTPF)[J].International Journal of RockMechanics&Mining Sciences,2003,(40):1011-1020.
[20]陈彭年,陈宏德,高莉青.世界地应力实测资料汇编[M].北京:地震出版社,1990.
[21]尤明庆,苏承东.层理倾角不同的砂岩变形破坏和强度的研究[J].河南理工大学学报(自然科学版),2009,28(5):626-635.YOU Ming-qing,SU Cheng-dong.Study on thedeformation,failure and strength of sandstone withvarious declined bedding[J].Journal of HenanPolytechnic University(Natural Science),2009,28(5):626-635.
[22]尤明庆.岩石试样的杨氏模量与围压的关系[J].岩石力学与工程学报,2003,22(1):53-60.YOU Ming-qing.Effect of confining pressure on theYoung’s modulus of rock specimen[J].Chinese Journalof Rock Mechanics and Engineering,2003,22(1):53-60.
[23]曹庆林,周慧.节理岩体变形特性的参数研究及等效弹模的数值确定[J].冶金矿山设计与建设,1996,(2):3-7.CAO Qing-lin,ZHOU Hui.Numerically determining theequivalent modulus of jointed rock mass based on theparametric study on its compressibility[J].Metal MineDesign and Construction,1996,(2):3-7.
[24]HUANG T H,CHANG C S,YANG Z Y.Elastic modulusfor fractured rock mass[J].Rock Mechanics and RockEngineering,1995,28(3):135-144.
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