硬脆性岩石卸荷流变特性及拟合回归分析
|
摘要
通过开展花岗岩室内三轴卸荷流变试验,研究硬脆性岩石的卸荷流变力学特性、变形特征及破坏特征,分析岩石的破裂机制。结果表明,改进的Mohr-Coulomb强度准则能够较好地描述岩石卸荷流变破坏强度特性,改进的对数型卸荷蠕变方程能够有效地反映和预测硬脆性岩石的卸荷蠕变变形特征。研究成果旨在为硬脆性岩石的卸荷流变力学特性研究提供借鉴。
The rheological test during unloading phase for different stress paths were performed in laboratory by using rock triaxial rheological servo apparatus to study the unloading rheological mechanical properties,deformation characteristics and failure characteristics of the hard brittle granite rock mass.Its failure mechanism was also analyzed.The results showed that the improved Mohr-Coulomb strength criterion of hard brittle rock was capable of reflecting the damage strength characteristics with small prediction error.Meanwhile,the improved creep empirical equations for brittle rock that have been established by regression fitting method can effectively reflect and predict the unloading creep deformation characteristics of hard brittle rock.The results provides important experimental and theoretical foundation for the unloading creep characteristics of brittle rock.
The rheological test during unloading phase for different stress paths were performed in laboratory by using rock triaxial rheological servo apparatus to study the unloading rheological mechanical properties,deformation characteristics and failure characteristics of the hard brittle granite rock mass.Its failure mechanism was also analyzed.The results showed that the improved Mohr-Coulomb strength criterion of hard brittle rock was capable of reflecting the damage strength characteristics with small prediction error.Meanwhile,the improved creep empirical equations for brittle rock that have been established by regression fitting method can effectively reflect and predict the unloading creep deformation characteristics of hard brittle rock.The results provides important experimental and theoretical foundation for the unloading creep characteristics of brittle rock.
引文
[1]吴玉山,李纪鼎.大理岩卸载力学特性研究[J].岩土力学,1984,5(1):30-36.WU Yushan,LI Jiding.Research on marble unloading mechanical properties[J].Rock and Soil Mechanics,1984,5(1):30-36.(in Chinese)
[2]郭印同,杨春和,付建军.盐岩三轴卸荷力学特性试验研究[J].岩土力学,2012(3):725-730.GUO Yintong,YANG Chunhe,FU Jianjun.Experimental research on mechanical characteristics of salt rock under triaxial unloading test[J].Rock and Soil Mechanics,2012(3):725-730.(in Chinese)
[3]李天斌,王兰生.卸荷应力状态下玄武岩变形破坏特征的试验研究[J].岩石力学与工程学报,1993,12(4):321-327.LI Tianbin,WANG Lansheng.An expeimental study on the deformation and failure features of abasalt under unloading condition[J].Chinese Journal of Rock Mechanics and Engineering,1993,12(4):321-327.(in Chinese)
[4]沈军辉,王兰生,王青海,等.卸荷岩体的变形破裂特征[J].岩石力学与工程学报,2003,22(12):2028-2031.SHEN Junhui,WANG Langsheng,WANG Qinghai,et al.Deformation and fracture features of unloaded rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(12):2028-2031.(in Chinese)
[5]黄润秋,黄达.高地应力条件下卸荷速率对锦屏大理岩力学特性影响规律试验研究[J].岩石力学与工程学报,2010(1):21-33.HUANG Runqiu,HUANG Da.Experimental research on affection laws of unloading rates on mechanical properties of jinping marble under high geostress[J].Chinese Journal of Rock Mechanics and Engineering,2010(1):21-33.(in Chinese)
[6]刘豆豆,陈卫忠,杨建平,等.脆性岩石卸围压强度特性试验研究[J].岩土力学,2009(9):2588-2594.LIU Doudou,CHEN Weizhong,YANG Jianping,et al.Experimental research on strength characteristic of brittle rock unloading confining pressure[J].Rock and Soil Mechanics,2009(9):2588-2594.(in Chinese)
[7]赵国彦,戴兵,董陇军,等.不同应力路径下岩石三轴卸荷力学特性与强度准则研究[J].岩土力学,2015,36(11):3121-3127.ZHAO Guoyan,DAI Bing,DONG Longjun,et al.Experimental research on mechanical characteristics and strength criterion of rock of triaxial unloading tests under different stress paths[J].Rock and Soil Mechanics,2015,36(11):3121-3127.(in Chinese)
[8]李连崇,李少华,李宏.基于岩石长期强度特征的岩质边坡时效变形过程分析[J].岩土工程学报,2014,36(1):47-56.LI Lianchong,LI Shaohua,LI Hong.Time-dependent deformation of rock slopes based on long-term strength characteristics of rocks[J].Chinese Journal of Geotechnical Engineering,2014,36(1):47-56.(in Chinese)
[9]张建智,俞缙,蔡燕燕,等.渗水膨胀岩隧洞黏弹塑性蠕变解及变形特性分析[J].岩土工程学报,2014,36(12):2195-2202.ZHANG Jianzhi,YU Jin,CAI Yanyan,et al.Viscoelastic-plastic creep solutions and deformation properties of tunnels in swelling rocks under seepage[J].Chinese Journal of Geotechnical Engineering,2014,36(12):2195-2202.(in Chinese)
[10]苏承东,陈晓祥,袁瑞甫.单轴压缩分级松弛作用下煤样变形与强度特征分析[J].岩石力学与工程学报,2014,33(6):1135-1141.SU Chengdong,CHEN Xiaoxiang,YUAN Ruifu.A-nalysis of deformation and strength characteristics of coal samples under uniaxial compression of stepped relaxation[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(6):1135-1141.(in Chinese)
[11]崔臻,侯靖,吴旭敏,等.脆性岩体破裂扩展时间效应对引水隧洞长期稳定性影响研究[J].岩石力学与工程学报,2014,33(5):983-995.CUI Zhen,HOU Jing,WU Xumin,et al.Influence of time-dependent of crack propagation of brittle rock on long-term stability of jinping water diversion tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(5):983-995.(in Chinese)
[12]程丽娟,李仲奎,郭凯.锦屏一级水电站地下厂房洞室群围岩时效变形研究[J].岩石力学与工程学报,2011,30(S1):3081-3088.CHENG Lijuan,LI Zhongkui,GUO Kai.Time-dependent deformation study of underground powerhouse of Jinping I hydropower station[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(S1):3081-3088.(in Chinese)
[13]闫子舰,夏才初,李宏哲,等.分级卸荷条件下锦屏大理岩流变规律研究[J].岩石力学与工程学报,2008,27(10):2153-2159.YAN Zijian,XIA Caichu,LI Hongzhe,et al.Study on rheological rules of marble in Jinping hydropower station under condition of step unloading[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(10):2153-2159.(in Chinese)
[14]石振明,张力.锦屏绿片岩分级卸荷流变规律研究[J].地下空间与工程学报,2010,6(4):756-762.SHI Zhenming,ZHANG Li.Study on rheological rules of green schist in Jinping hydropower station under condition of step unloading[J].Chinese Journal of Underground Space and Engineering,2010,6(4):756-762.(in Chinese)
[15]王宇,李建林,邓华锋,等.软岩三轴卸荷流变力学特性及本构模型研究[J].岩土力学,2012,33(1):3338-3344.WANG Yu,LI Jianlin,DENG Huafeng,et al.Investigation on unloading triaxial rheological mechanical properties of soft rock and its constitutive model[J].Rock and Soil Mechanics,2012,33(1):3338-3344.(in Chinese)
[16]王宇,李建林,刘锋,等.节理泥质粉砂岩卸荷流变试验及流变规律研究[J].岩土力学,2012,33(12):3639-3644,3652.WANG Yu,LI Jianlin,LIU Feng,et al.Study of unloading triaxial rheological tests and rules of joint pelitic siltstone[J].Rock and Soil Mechanics,2012,33(12):3639-3644,3652.(in Chinese)
[17]姜德义,范金洋,陈结,等.盐岩在围压卸荷作用下的扩容特征研究[J].岩土力学,2013,34(7):1881-1886.JIANG Deyi,FAN Jinyang,CHEN Jie,et al.Study of dilatancy characteristics of salt rock under unloading action of confining pressure[J].Rock and Soil Mechanics,2013,34(7):1881-1886.(in Chinese)
[18]朱杰兵,汪斌,杨火平,等.页岩卸荷流变力学特性的试验研究[J].岩石力学与工程学报,2007,26(S2):4452-4456.ZHU Jiebing,WANG Bin,YANG Huoping,et al.Experimental study on rheological mechanical properties of shale under unloading condition[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S2):4452-4456.(in Chinese)
[19]原先凡,邓华锋,李建林.砂质泥岩卸荷流变本构模型研究[J].岩土工程学报,2015,37(9):1733-1739.YUAN Xianfan,DENG Huafeng,LI Jianlin.Unloading rheological constitutive model for sandy mudstone[J].Chinese Journal of Geotechnical Engineering,2015,37(9):1733-1739.(in Chinese)
[2]郭印同,杨春和,付建军.盐岩三轴卸荷力学特性试验研究[J].岩土力学,2012(3):725-730.GUO Yintong,YANG Chunhe,FU Jianjun.Experimental research on mechanical characteristics of salt rock under triaxial unloading test[J].Rock and Soil Mechanics,2012(3):725-730.(in Chinese)
[3]李天斌,王兰生.卸荷应力状态下玄武岩变形破坏特征的试验研究[J].岩石力学与工程学报,1993,12(4):321-327.LI Tianbin,WANG Lansheng.An expeimental study on the deformation and failure features of abasalt under unloading condition[J].Chinese Journal of Rock Mechanics and Engineering,1993,12(4):321-327.(in Chinese)
[4]沈军辉,王兰生,王青海,等.卸荷岩体的变形破裂特征[J].岩石力学与工程学报,2003,22(12):2028-2031.SHEN Junhui,WANG Langsheng,WANG Qinghai,et al.Deformation and fracture features of unloaded rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(12):2028-2031.(in Chinese)
[5]黄润秋,黄达.高地应力条件下卸荷速率对锦屏大理岩力学特性影响规律试验研究[J].岩石力学与工程学报,2010(1):21-33.HUANG Runqiu,HUANG Da.Experimental research on affection laws of unloading rates on mechanical properties of jinping marble under high geostress[J].Chinese Journal of Rock Mechanics and Engineering,2010(1):21-33.(in Chinese)
[6]刘豆豆,陈卫忠,杨建平,等.脆性岩石卸围压强度特性试验研究[J].岩土力学,2009(9):2588-2594.LIU Doudou,CHEN Weizhong,YANG Jianping,et al.Experimental research on strength characteristic of brittle rock unloading confining pressure[J].Rock and Soil Mechanics,2009(9):2588-2594.(in Chinese)
[7]赵国彦,戴兵,董陇军,等.不同应力路径下岩石三轴卸荷力学特性与强度准则研究[J].岩土力学,2015,36(11):3121-3127.ZHAO Guoyan,DAI Bing,DONG Longjun,et al.Experimental research on mechanical characteristics and strength criterion of rock of triaxial unloading tests under different stress paths[J].Rock and Soil Mechanics,2015,36(11):3121-3127.(in Chinese)
[8]李连崇,李少华,李宏.基于岩石长期强度特征的岩质边坡时效变形过程分析[J].岩土工程学报,2014,36(1):47-56.LI Lianchong,LI Shaohua,LI Hong.Time-dependent deformation of rock slopes based on long-term strength characteristics of rocks[J].Chinese Journal of Geotechnical Engineering,2014,36(1):47-56.(in Chinese)
[9]张建智,俞缙,蔡燕燕,等.渗水膨胀岩隧洞黏弹塑性蠕变解及变形特性分析[J].岩土工程学报,2014,36(12):2195-2202.ZHANG Jianzhi,YU Jin,CAI Yanyan,et al.Viscoelastic-plastic creep solutions and deformation properties of tunnels in swelling rocks under seepage[J].Chinese Journal of Geotechnical Engineering,2014,36(12):2195-2202.(in Chinese)
[10]苏承东,陈晓祥,袁瑞甫.单轴压缩分级松弛作用下煤样变形与强度特征分析[J].岩石力学与工程学报,2014,33(6):1135-1141.SU Chengdong,CHEN Xiaoxiang,YUAN Ruifu.A-nalysis of deformation and strength characteristics of coal samples under uniaxial compression of stepped relaxation[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(6):1135-1141.(in Chinese)
[11]崔臻,侯靖,吴旭敏,等.脆性岩体破裂扩展时间效应对引水隧洞长期稳定性影响研究[J].岩石力学与工程学报,2014,33(5):983-995.CUI Zhen,HOU Jing,WU Xumin,et al.Influence of time-dependent of crack propagation of brittle rock on long-term stability of jinping water diversion tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(5):983-995.(in Chinese)
[12]程丽娟,李仲奎,郭凯.锦屏一级水电站地下厂房洞室群围岩时效变形研究[J].岩石力学与工程学报,2011,30(S1):3081-3088.CHENG Lijuan,LI Zhongkui,GUO Kai.Time-dependent deformation study of underground powerhouse of Jinping I hydropower station[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(S1):3081-3088.(in Chinese)
[13]闫子舰,夏才初,李宏哲,等.分级卸荷条件下锦屏大理岩流变规律研究[J].岩石力学与工程学报,2008,27(10):2153-2159.YAN Zijian,XIA Caichu,LI Hongzhe,et al.Study on rheological rules of marble in Jinping hydropower station under condition of step unloading[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(10):2153-2159.(in Chinese)
[14]石振明,张力.锦屏绿片岩分级卸荷流变规律研究[J].地下空间与工程学报,2010,6(4):756-762.SHI Zhenming,ZHANG Li.Study on rheological rules of green schist in Jinping hydropower station under condition of step unloading[J].Chinese Journal of Underground Space and Engineering,2010,6(4):756-762.(in Chinese)
[15]王宇,李建林,邓华锋,等.软岩三轴卸荷流变力学特性及本构模型研究[J].岩土力学,2012,33(1):3338-3344.WANG Yu,LI Jianlin,DENG Huafeng,et al.Investigation on unloading triaxial rheological mechanical properties of soft rock and its constitutive model[J].Rock and Soil Mechanics,2012,33(1):3338-3344.(in Chinese)
[16]王宇,李建林,刘锋,等.节理泥质粉砂岩卸荷流变试验及流变规律研究[J].岩土力学,2012,33(12):3639-3644,3652.WANG Yu,LI Jianlin,LIU Feng,et al.Study of unloading triaxial rheological tests and rules of joint pelitic siltstone[J].Rock and Soil Mechanics,2012,33(12):3639-3644,3652.(in Chinese)
[17]姜德义,范金洋,陈结,等.盐岩在围压卸荷作用下的扩容特征研究[J].岩土力学,2013,34(7):1881-1886.JIANG Deyi,FAN Jinyang,CHEN Jie,et al.Study of dilatancy characteristics of salt rock under unloading action of confining pressure[J].Rock and Soil Mechanics,2013,34(7):1881-1886.(in Chinese)
[18]朱杰兵,汪斌,杨火平,等.页岩卸荷流变力学特性的试验研究[J].岩石力学与工程学报,2007,26(S2):4452-4456.ZHU Jiebing,WANG Bin,YANG Huoping,et al.Experimental study on rheological mechanical properties of shale under unloading condition[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S2):4452-4456.(in Chinese)
[19]原先凡,邓华锋,李建林.砂质泥岩卸荷流变本构模型研究[J].岩土工程学报,2015,37(9):1733-1739.YUAN Xianfan,DENG Huafeng,LI Jianlin.Unloading rheological constitutive model for sandy mudstone[J].Chinese Journal of Geotechnical Engineering,2015,37(9):1733-1739.(in Chinese)