高温作用下花岗岩的声发射特征研究
|
摘要
通过MTS810材料测试系统及AE21C声发射检测仪对山东临沂花岗岩在20℃～800℃单轴压缩下的声发射特征进行试验研究,分别分析升温过程中花岗岩振铃计数率随时间的变化规律以及加载过程中花岗岩的声发射特征参量与应力-应变之间的关系。研究表明:升温及加载过程中,花岗岩声发射振铃计数率随着温度升高而增大,声发射活动也变得更频繁;其声发射参量在400℃～800℃高温后与高温下有较大差别,高温后的声发射参量明显低于高温下,岩样内部裂纹较少以致高温后花岗岩的强度等力学指标要优于高温下;各温度段高温下声发射振铃累计数都要高于高温后,尤其在800℃时,两者相差超过1倍;800℃前花岗岩岩样主要呈劈裂和剪切破坏为主的脆性破坏,未出现强烈的塑性破坏;高温使储存的能量显著增多并加速能量耗散,能量的耗散和弹性能的释放使岩石的强度减小,宏观裂纹增多并最终破坏。
The laboratory tests are made for studying characteristics of acoustic emission(AE) of granite from Linyi in Shandong province at 20℃ to 800℃ using hydraulic-pressure servo testing system MTS810 and acoustic emission instrument AE21C.The relationship between ringdown count rate of granite and time as well as the relationship between AE parameters and stress-strain curves due to uniaxial compression loading are analyzed under different temperatures.Studies have shown that ringdown count rate rises and AE activity becomes more frequent with temperature increases both in the processes of heating and loading.AE parameters are quite different at and after the high temperature,of which AE parameters after high temperature are significantly lower than that at high temperature;and internal cracks are fewer resulting in that mechanical properties at high temperature are superior to that after high temperature.Ringdown cumulative count of granite at high temperature is higher than that after high temperature;especially at 800 ℃ when there is more than a doubled difference.The high temperature causes a significant increase in energy and accelerating the energy dissipation.The granite specimens showed brittle failure such as splitting and shear failure which did not appear strong ductile failure.The strength of the rock decreases and macroscopic cracks increase due to energy dissipation and elastic energy release which eventually cause deformation and failure of granite.
The laboratory tests are made for studying characteristics of acoustic emission(AE) of granite from Linyi in Shandong province at 20℃ to 800℃ using hydraulic-pressure servo testing system MTS810 and acoustic emission instrument AE21C.The relationship between ringdown count rate of granite and time as well as the relationship between AE parameters and stress-strain curves due to uniaxial compression loading are analyzed under different temperatures.Studies have shown that ringdown count rate rises and AE activity becomes more frequent with temperature increases both in the processes of heating and loading.AE parameters are quite different at and after the high temperature,of which AE parameters after high temperature are significantly lower than that at high temperature;and internal cracks are fewer resulting in that mechanical properties at high temperature are superior to that after high temperature.Ringdown cumulative count of granite at high temperature is higher than that after high temperature;especially at 800 ℃ when there is more than a doubled difference.The high temperature causes a significant increase in energy and accelerating the energy dissipation.The granite specimens showed brittle failure such as splitting and shear failure which did not appear strong ductile failure.The strength of the rock decreases and macroscopic cracks increase due to energy dissipation and elastic energy release which eventually cause deformation and failure of granite.
引文
[1]NOMIKOS P P,SAKKAS K M,SOFIANOS A I.Acousticemission of Dionysos marble specimens in uniaxial compression[C]//The 12th International Congress on Rock Mechanics of the InternationalSociety for Rock Mechanics.[S.l.]:[s.n.],2011:771–775.
[2]GANNE P,VERVOORT A,WEVESS M.Quantification of pre-peakbrittle damage:correlation between acoustic emission and observedmicro-fracturing[J].International Journal of Rock Mechanics andMining Sciences,2007,44(5):720–729.
[3]李庶林,尹贤刚,王泳嘉,等.单轴受压岩石破坏全过程声发射特征研究[J].岩石力学与工程学报,2004,23(15):2499–2503.(LIShulin,YIN Xiangang,WANG Yongjia,et al.Studies on acousticemission characteristics of uniaxial compressive rock failure[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2 499–2 503.(in Chinese))
[4]武晋文,赵阳升,万志军,等.中高温三轴应力下鲁灰花岗岩热破裂声发射特征的试验研究[J].岩土力学,2009,30(11):3331–3336.(WU Jinwen,ZHAO Yangsheng,WAN Zhijun,et al.Experimentalstudy of acoustic emission characteristics of granite thermal crackingunder middle-high temperature and triaxial stress[J].Rock and SoilMechanics,2009,30(11):3 331–3 336.(in Chinese))
[5]王德咏,吴刚,葛修润.高温作用后石灰岩受压破坏过程的声发射试验研究[J].上海交通大学学报,2011,45(5):743–748.(WANGDeyong,WU Gang,GE Xiurun.Acoustic emission characteristics oflimestone during compression and fracture after high temperature[J].Journal of Shanghai Jiaotong University,2011,45(5):743–748.(inChinese))
[6]姜德义,陈结,任松,等.盐岩单轴应变率效应与声发射特征试验研究[J].岩石力学与工程学报,2012,31(2):326–335.(JIANGDeyi,CHEN Jie,REN Song,et al.Experimental study of strain rateeffect and acousticemission characteristics of salt rock under uniaxialcompression[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(2):326–335.(in Chinese))
[7]蒋海昆,张流,周永胜.不同温度条件下花岗岩变形破坏及声发射时序特征[J].地震,2000,20(3):88–94.(JIANG Haikun,ZHANGLiu,ZHOU Yongsheng.Characteristics of AE temporal sequences inthe process of deformation and failure of granite at high pressure anddifferent temperatures[J].Earthquakes,2000,20(3):88–94.(inChinese))
[8]张志镇,高峰,徐小丽.花岗岩单轴压缩的声发射特征及热力耦合模型[J].地下空间与工程学报,2010,6(1):70–74.(ZHANGZhizhen,GAO Feng,XU Xiaoli.Acoustic emission characteristics andthermodynamic and thermodynamic coupling model of granite underuniaxial compression[J].Chinese Journal of Underground Space andEngineering,2010,6(1):70–74.(in Chinese))
[9]裴建良,刘建锋,张茹,等.单轴压缩条件下花岗岩声发射事件空间分布的分维特征研究[J].四川大学学报:工程科学版,2010,42(6):51–55.(PEI Jianliang,LIU Jianfeng,ZHANG Ru,et al.Fractalstudy on spatial distribution of acoustic emission events of granitespecimens under uniaxial compression[J].Journal of Sichuan University:Engineering Science,2010,42(6):51–55.(in Chinese))
[10]谢强,张永兴,余贤斌.石灰岩在单轴压缩条件下的声发射特性[J].重庆建筑大学学报,2002,24(1):19–24.(XIE Qiang,ZHANG Yongxing,YU Xianbin.Study on acoustic emission oflimestone in uniaxial compression test[J].Journal of Chongqing JianzhuUniversity,2002,24(1):19–24.(in Chinese))
[11]秦四清,李造鼎,张倬元,等.岩石声发射技术概论[M].成都:西南交通大学出版社,1993:16–28.(QIN Siqing,LI Zaoding,ZHANG Zhuoyuan,et al.An introduction to acoustic emission techniquesin rocks[M].Chengdu:Southwest Jiaotong University Press,1993:16–28.(in Chinese))
[12]陈有亮,邵伟,周有成.高温作用后花岗岩力学性能试验研究[J].力学季刊,2011,32(3):397–402.(CHEN Youliang,SHAO Wei,ZHOU Youcheng.Experimental study on mechanical properties ofgranite after high temperature[J].Chinese Quarterly of Mechanics,2011,32(3):397–402.(in Chinese))
[13]殷正钢.岩石破坏过程中的声发射特征及其损伤实验研究[硕士学位论文][D].长沙:中南大学,2005:24–40.(YIN Zhenggang.Acoustic emission characteristics and injury experimental study in theprocess of rock failure[M.S.Thesis][D].Changsha:Central SouthUniv ersity,2005:24–40.(in Chinese))
[14]黄达,黄润秋,张永兴.粗晶大理岩单轴压缩力学特性的静态加载速率效应及能量机制实验研究[J].岩石力学与工程学报,2012,31(2):245–255.(HUANG Da,HUANG Runqiu,ZHANG Yongxing.Experimental investigations on static loading rate effects onmechanical properties and energy mechanism of coarse crystal grainmable under uniaxial compression[J].Chinese Journal of RockMechanics and Engineering,2012,31(2):245–255.(in Chinese))
[15]谢和平,彭瑞东,鞠杨,等.岩石破坏的能量分析初探[J].岩石力学与工程学报,2005,24(15):2603–2608.(XIE Heping,PENGRuidong,JU Yang,et al.On energy analysis of rock failure[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(15):2 603–2 608.(in Chinese))
[2]GANNE P,VERVOORT A,WEVESS M.Quantification of pre-peakbrittle damage:correlation between acoustic emission and observedmicro-fracturing[J].International Journal of Rock Mechanics andMining Sciences,2007,44(5):720–729.
[3]李庶林,尹贤刚,王泳嘉,等.单轴受压岩石破坏全过程声发射特征研究[J].岩石力学与工程学报,2004,23(15):2499–2503.(LIShulin,YIN Xiangang,WANG Yongjia,et al.Studies on acousticemission characteristics of uniaxial compressive rock failure[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(15):2 499–2 503.(in Chinese))
[4]武晋文,赵阳升,万志军,等.中高温三轴应力下鲁灰花岗岩热破裂声发射特征的试验研究[J].岩土力学,2009,30(11):3331–3336.(WU Jinwen,ZHAO Yangsheng,WAN Zhijun,et al.Experimentalstudy of acoustic emission characteristics of granite thermal crackingunder middle-high temperature and triaxial stress[J].Rock and SoilMechanics,2009,30(11):3 331–3 336.(in Chinese))
[5]王德咏,吴刚,葛修润.高温作用后石灰岩受压破坏过程的声发射试验研究[J].上海交通大学学报,2011,45(5):743–748.(WANGDeyong,WU Gang,GE Xiurun.Acoustic emission characteristics oflimestone during compression and fracture after high temperature[J].Journal of Shanghai Jiaotong University,2011,45(5):743–748.(inChinese))
[6]姜德义,陈结,任松,等.盐岩单轴应变率效应与声发射特征试验研究[J].岩石力学与工程学报,2012,31(2):326–335.(JIANGDeyi,CHEN Jie,REN Song,et al.Experimental study of strain rateeffect and acousticemission characteristics of salt rock under uniaxialcompression[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(2):326–335.(in Chinese))
[7]蒋海昆,张流,周永胜.不同温度条件下花岗岩变形破坏及声发射时序特征[J].地震,2000,20(3):88–94.(JIANG Haikun,ZHANGLiu,ZHOU Yongsheng.Characteristics of AE temporal sequences inthe process of deformation and failure of granite at high pressure anddifferent temperatures[J].Earthquakes,2000,20(3):88–94.(inChinese))
[8]张志镇,高峰,徐小丽.花岗岩单轴压缩的声发射特征及热力耦合模型[J].地下空间与工程学报,2010,6(1):70–74.(ZHANGZhizhen,GAO Feng,XU Xiaoli.Acoustic emission characteristics andthermodynamic and thermodynamic coupling model of granite underuniaxial compression[J].Chinese Journal of Underground Space andEngineering,2010,6(1):70–74.(in Chinese))
[9]裴建良,刘建锋,张茹,等.单轴压缩条件下花岗岩声发射事件空间分布的分维特征研究[J].四川大学学报:工程科学版,2010,42(6):51–55.(PEI Jianliang,LIU Jianfeng,ZHANG Ru,et al.Fractalstudy on spatial distribution of acoustic emission events of granitespecimens under uniaxial compression[J].Journal of Sichuan University:Engineering Science,2010,42(6):51–55.(in Chinese))
[10]谢强,张永兴,余贤斌.石灰岩在单轴压缩条件下的声发射特性[J].重庆建筑大学学报,2002,24(1):19–24.(XIE Qiang,ZHANG Yongxing,YU Xianbin.Study on acoustic emission oflimestone in uniaxial compression test[J].Journal of Chongqing JianzhuUniversity,2002,24(1):19–24.(in Chinese))
[11]秦四清,李造鼎,张倬元,等.岩石声发射技术概论[M].成都:西南交通大学出版社,1993:16–28.(QIN Siqing,LI Zaoding,ZHANG Zhuoyuan,et al.An introduction to acoustic emission techniquesin rocks[M].Chengdu:Southwest Jiaotong University Press,1993:16–28.(in Chinese))
[12]陈有亮,邵伟,周有成.高温作用后花岗岩力学性能试验研究[J].力学季刊,2011,32(3):397–402.(CHEN Youliang,SHAO Wei,ZHOU Youcheng.Experimental study on mechanical properties ofgranite after high temperature[J].Chinese Quarterly of Mechanics,2011,32(3):397–402.(in Chinese))
[13]殷正钢.岩石破坏过程中的声发射特征及其损伤实验研究[硕士学位论文][D].长沙:中南大学,2005:24–40.(YIN Zhenggang.Acoustic emission characteristics and injury experimental study in theprocess of rock failure[M.S.Thesis][D].Changsha:Central SouthUniv ersity,2005:24–40.(in Chinese))
[14]黄达,黄润秋,张永兴.粗晶大理岩单轴压缩力学特性的静态加载速率效应及能量机制实验研究[J].岩石力学与工程学报,2012,31(2):245–255.(HUANG Da,HUANG Runqiu,ZHANG Yongxing.Experimental investigations on static loading rate effects onmechanical properties and energy mechanism of coarse crystal grainmable under uniaxial compression[J].Chinese Journal of RockMechanics and Engineering,2012,31(2):245–255.(in Chinese))
[15]谢和平,彭瑞东,鞠杨,等.岩石破坏的能量分析初探[J].岩石力学与工程学报,2005,24(15):2603–2608.(XIE Heping,PENGRuidong,JU Yang,et al.On energy analysis of rock failure[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(15):2 603–2 608.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心