丹江口水库区岩石软化性能试验研究
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摘要
通过采用岩样干燥、自然和饱和状态下的物理力学性能试验,对丹江口水库库区代表性岩样的软化性能进行了研究,以此探讨岩石软化作用,为丹江口水库续建工程诱发地震机理研究提供基础数据。结果表明,随着试件含水率的增加,岩石单轴抗压强度、弹性模量和泊松比均下降,岩石的软化系数与孔隙比有直接关系。
By the physics-mechanics property examination of rock speimens which are on dry state,natural state and saturation state,Softening property of typical rocks are experimented in Danjiangkou Reservoir area;which can provide basic data for the study on reservoir-induced seismicity mechanism of the subsequent object of Danjiangkou Reservoir.The result shows that values of physical mechanics parameters reduce with the decrease of water ratio in rock,including uniaxial compressive strength,elastic modulus and Poisson's ratio.So the softening coefficients of rocks are directly related to void ratios.
By the physics-mechanics property examination of rock speimens which are on dry state,natural state and saturation state,Softening property of typical rocks are experimented in Danjiangkou Reservoir area;which can provide basic data for the study on reservoir-induced seismicity mechanism of the subsequent object of Danjiangkou Reservoir.The result shows that values of physical mechanics parameters reduce with the decrease of water ratio in rock,including uniaxial compressive strength,elastic modulus and Poisson's ratio.So the softening coefficients of rocks are directly related to void ratios.
引文
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[2]PRADEEP TALWANI,ACREE S.Pore pressure diffusionand the mechanism of reservoir-induced seismicity[J].Pure&Application Geophysics,1985,122(6):947-965.
[3]高士钧,曾心传,陈永成,等.水库诱生的孔压变化及应力特征[J].西北地震学报,1990,12(1):87-95.GAO Shi-jun,ZENG Xin-chuan,CHEN Yong-cheng,et al.The pore pressure variation and stress characteristicsinduced by reservoir[J].Northwestern Seismological Journal,1990,12(1):87-95.
[4]梁青槐,高士钧,曾心传.水库蓄水引起的附加应力场、孔压场和形变场[J].华南地震,1994,14(4):65-72.LIANG Qing-qui,GAO Shi-jun,ZENG Xin-chuan.Theadditional sterss field,pore-pressure field anddeformation field caused by impornding a reservoir[J].South China Journal of Seismology,1994,14(4):65-72.
[5]LEE BELL M,AMOS NUR.Strength change due toreservoir-induced pore pressure and stresses andapplication to lake oroville[J].Geophysical Research,1978,83(9):4 469-4 483.
[6]颜玉定,李亚林,张专,等.岩石水压致裂和诱发地震的实验研究[J].中国地震,2005,21(21):193-206.YAN Yu-ding,LI Ya-lin,ZHANG Zhuan,et al.Aresearch of rock experiment on hydraulic fracturing andinduced earthquake[J].Earthquake Research in China,2005,21(21):193-206.
[7]中华人民共和国地质矿产部.DY-94岩石物理力学性质试验规程[S].北京:地质出版社,1994.
[8]国际岩石力学学会实验室和现场试验标准委员会.岩石力学试验建议方法[M].北京:煤炭工业出版社,1982.
[9]OKUBO S,NISHIMATSU Y,HE C.Technical note:Loading rate dependence of classⅡrock behavior inuniaxial and triaxial compression tests:an application ofaproposed new control method[J].International Journalof Rock Mechanics and Mining Sciences&Geo-mechanics Abstracts,1990,27:559-562.
[10]OKUBO S,NISHIMATSU Y.Uniaxial compressiontesting using linear combination of stress and strain as thecontrol variable[J].International Journal of Rock Mechanics and Mining Sciences&Geomechanics Abstracts,1985,22:223-230.
[11]中华人民共和国水利部.SL264-2001水利水电工程岩石试验规程[S].内蒙古:内蒙古大学出版社,2003.
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