基于巴西劈裂试验的花岗岩热损伤研究

doi:10.13722/j.cnki.jrme.2018.0576

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摘要

针对常温(25 ℃)，200 ℃，400 ℃，600 ℃和800 ℃温度处理后的花岗岩圆盘试样开展巴西劈裂试验，分析抗拉强度、体积膨胀率、P波波速等宏观物理力学性质的变化情况，同时研究温度对花岗岩微观结构和声发射特性的影响。研究结果表明：(1) 扫描电镜扫描的结果显示，花岗岩经高温处理后内部萌生微裂纹，随着处理温度升高，微裂纹数目增多、延伸长度增长、张开宽度及扩展范围增大，且不同矿物成分的温度敏感性存在差异；(2) 花岗岩经高温处理后抗拉强度下降，体积膨胀，P波波速降低；(3) 在400 ℃～600 ℃范围内，P波波速骤降且试样切片的裂纹密度骤增，表明花岗岩热损伤阈值温度在此温度区间内；(4) 声发射监测的结果显示，不同温度处理后试样的声发射事件时序分布存在差异，较高温度(600 ℃和800 ℃)处理后的圆盘试样，其加载过程中的声发射事件数目明显少于较低温度(≤400 ℃)处理后的圆盘试样，且试样破坏前夕声发射事件的增幅显著减小，声发射事件的定位结果与宏观劈裂裂纹的对应性减弱。

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	吴顺川1
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	郭沛1
	张诗淮1
	张光1
	姜日华1

关键词 ：岩石力学, 高温, 热损伤, 花岗岩, 巴西劈裂试验, 扫描电镜, 声发射

Abstract：

Brazilian splitting tests were conducted on standard granite discs treated under 25 ℃，200 ℃，400 ℃，600 ℃，and 800 ℃，respectively，to investigate the macroscopic physical and mechanical properties，including tensile strength，volume expansion ratio，P-wave velocity. In addition，temperature effect on microstructure and acoustic emission(AE) characteristics of granite was studied. Results show that：(1) Scanning electron microscope (SEM) inspections reveal that there exist temperature-induced microcracks within the granite discs，including intragranular crack，intergranular crack and transgranular crack. With the increase of temperature，the number，extension length，opening width，and extended range of microcracks increase monotonically. The temperature sensitivity of different mineral compositions are different；(2) After high-temperature treatment，the tensile strength decreases，the volume of granite disc expands，and the P-wave velocity reduces；(3) The P-wave velocity drops sharply and the crack density of granite sections increased sharply in the range of 400 ℃–600 ℃，indicating a thermal damage threshold within this temperature range；(4) Results of AE events show different characteristics of AE temporal sequences of discs treated by different high temperature，and the number of AE events during the loading process of the discs treated by the higher temperature(600 ℃ and 800 ℃) is obviously less than that of those treated by lower temperature(≤400 ℃)，moreover，the increasing range of AE events decreased significantly before the splitting of the discs，and the correlation between the AE locating results and the macroscopic splitting cracks is weak.

Key words： rock mechanics high temperature thermal damage granite Brazilian splitting test scanning electron microscope(SEM) acoustic emission(AE)

引用本文:

吴顺川1，2，郭沛1，张诗淮1，张光1，姜日华1. 基于巴西劈裂试验的花岗岩热损伤研究[J]. 岩石力学与工程学报, 2018, 37(S2): 3805-3816.
WU Shunchuan1，2，GUO Pei1，ZHANG Shihuai1，ZHANG Guang1，JIANG Rihua1. Study on thermal damage of granite based on Brazilian splitting test. , 2018, 37(S2): 3805-3816.

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https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2018.0576 或 https://rockmech.whrsm.ac.cn/CN/Y2018/V37/IS2/3805

[1]	何满潮，钱七虎. 深部岩体力学基础[M]. 北京：科学出版社，2010：126-134.(HE Manchao，QIAN Qihu. The basis of deep rock mechanics[M]. Beijing：Science Press，2010：126-134.(in Chinese))
[2]	寇绍全. 热开裂损伤对花岗岩变形及破坏特性的影响[J]. 力学学报，1987，19(6)：550-556.(KOU Shaoquan. Effect of thermal cracking damage on the deformation and failure of granite[J]. Acta Mechanica Sinica，1987，19(6)：550-556.(in Chinese))
[3]	CHAKI S，TAKARLI M，AGBODJAN W P. Influence of thermal damage on physical properties of a granite rock：porosity，permeability and ultrasonic wave evolutions[J]. Construction and Building Materials，2008，22(7)：1456-1461.
[4]	LIU S，XU J Y. An experimental study on the physico-mechanical properties of two post-high-temperature rocks[J]. Engineering Geology，2015，185(4)：63-70.
[5]	朱合华，闫治国，邓涛，等. 3种岩石高温后力学性质的试验研究[J]. 岩石力学与工程学报，2006，25(10)：1945-1950.(ZHU Hehua，YAN Zhiguo，DENG Tao，et al. Testing study on mechanical properties of tuff，granite and breccia after high temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(10)：1945-1950.(in Chinese))
[6]	刘泉声，许锡昌. 温度作用下脆性岩石的损伤分析[J]. 岩石力学与工程学报，2000，19(4)：408-411.(LIU Quansheng，XU Xichang. Damage analysis of brittle rock at high temperature[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(4)：408-411.(in Chinese))
[7]	SUN H，SUN Q，DENG W N，et al. Temperature effect on microstructure and P-wave propagation in Linyi sandstone[J]. Applied Thermal Engineering，2017，115：913-922.
[8]	HOMAND-ETIENNE F，HOUPERT R. Thermally induced microcracking in granites：Characterization and analysis[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1989，26(2)：125-134.
[9]	ZUO J P，WANG J T，SUN Y J，et al. Effects of thermal treatment on fracture characteristics of granite from Beishan，a possible high-level radioactive waste disposal site in China[J]. Engineering Fracture Mechanics，2017，182：425-437.
[10]	VÁZQUEZ P，SHUSHAKOVA V，GÓMEZ-HERAS M. Influence of mineralogy on granite decay induced by temperature increase：Experimental observations and stress simulation[J]. Engineering Geology，2015，189：58-67.
[11]	CHEN Y，WANG C Y. Thermally induced acoustic emission in Westerly granite[J]. Geophysical Research Letters，1980，7(12)：1089-1092.
[12]	陈颙，吴晓东，张福勤. 岩石热开裂的实验研究[J]. 科学通报，1999，44(8)：880-883.(CHEN Yong，WU Xiaodong，ZHANG Fuqin. Experimental research on rock thermal cracking[J]. Chinese Science Bulletin，1999，44(8)：880-883.(in Chinese))
[13]	赵阳升，万志军，张渊，等. 岩石热破裂与渗透性相关规律的试验研究[J]. 岩石力学与工程学报，2010，29(10)：1970-1976.(ZHAO Yangsheng，WAN Zhijun，ZHANG Yuan，et al. Experimental study of related laws of rock thermal cracking and permeability[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1970-1976.(in Chinese))
[14]	吴刚，翟松韬，王宇. 高温下花岗岩的细观结构与声发射特性研究[J]. 岩土力学，2015，36(增1)：351-356.(WU Gang，ZHAI Songtao，WANG Yu. Research on characteristics of mesostructure and acoustic emission of granite under high temperature[J]. Rock and Soil Mechanics，2015，36(Supp.1)：351-356.(in Chinese))
[15]	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. Experimental study of acoustic emission characteristics of granite thermal cracking under middle-high temperature and triaxial stress[J]. Rock and Soil Mechanics，2009，30(11)：3331-3336.(in Chinese))
[16]	支乐鹏，许金余，刘志群，等. 高温后花岗岩冲击破坏行为及波动特性研究[J]. 岩石力学与工程学报，2013，32(1)：135-142.(ZHI Lepeng，XU Jinyu，LIU Zhiqun，et al. Research on impacting failure behavior and fluctuation characteristics of granite exposed to high temperature[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(1)：135-142.(in Chinese))
[17]	席道瑛. 花岗岩中矿物相变的物性特征[J]. 矿物学报，1994，14(3)：223-227.(XI Daoying. Physical characteristics of mineral phase transition in the granite[J]. Acta Mineralogica Sinica，1994，14(3)：223-227.(in Chinese))
[18]	YANG S Q，RANJITH P G，JING H W，et al. An experimental investigation on thermal damage and failure mechanical behavior of granite after exposure to different high temperature treatments[J]. Geothermics，2017，65：180-197.
[19]	SUN Q，ZHANG W Q，XUE L，et al. Thermal damage pattern and thresholds of granite[J]. Environmental Earth Sciences，2015，74(3)：2341-2349.
[20]	张伯虎，刘玮丰，邓建辉，等. 岩石拉伸破坏机制与应力波谱特征[J]. 岩土工程学报，2016，38(增2)：336-341.(ZHANG Bohu，LIU Weifeng，DENG Jianhui，et al. Damage mechanism and stress wave spectral characteristics of rock under tension[J]. Chinese Journal of Geotechnical Engineering，2016，38(Supp.2)：336-341.(in Chinese))
[21]	支乐鹏，许金余，刘志群，等. 高温后花岗岩巴西劈裂抗拉实验及超声特性研究[J]. 岩土力学，2012，33(增1)：61-66.(ZHI Lepeng，XU Jinyu，LIU Zhiqun，et al. Research on ultrasonic characteristics and Brazilian splitting-tensile test of granite under post-high temperature[J]. Rock and Soil Mechanics，2012，33(Supp.1)：61-66.(in Chinese))
[22]	方新宇，许金余，刘石，等. 高温后花岗岩的劈裂试验及热损伤特性研究[J]. 岩石力学与工程学报，2016，35(增1)：2687-2694.(FANG Xinyu，XU Jinyu，LIU Shi，et al. Research on splitting-tensile tests and thermal damage of granite under post-high temperature[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.1)：2687-2694.(in Chinese))
[23]	苏海健，靖洪文，赵洪辉，等. 高温处理后红砂岩抗拉强度及其尺寸效应研究[J]. 岩石力学与工程学报，2015，34(增1)：2879-2887.(SU Haijian，JING Hongwen，ZHAO Honghui，et al. Study on tensile strength and size effect of red sandstone after hightemperaturetreatment[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：2879-2887.(in Chinese))
[24]	ZHAO Z H，LIU Z N，PU H，et al. Effect of thermal treatment on Brazilian tensile strength of granites with different grain size distributions[J]. Rock Mechanics andRock Engineering，2018，51(4)：1-11.
[25]	ULUSAY R. The ISRM suggested methods for rock characterization，testing and monitoring：2007-2014[M]. [S.l.]：Springer，2014：39.
[26]	唐世斌，唐春安，朱万成，等. 热应力作用下的岩石破裂过程分析[J]. 岩石力学与工程学报，2006，25(10)：2071-2078.(TANG Shibin，TANG Chun'an，ZHU Wancheng，et al. Numerical investigation on rock failure process induced by thermal stress[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(10)：2071-2078.(in Chinese))
[27]	宫凤强，李夕兵，ZHAO J. 巴西圆盘劈裂试验中拉伸模量的解析算法[J]. 岩石力学与工程学报，2010，29(5)：881-891.(GONG Fengqiang，LI Xibing，ZHAO J. Analytical algorithm to estimate tensile modulus in brazilian disk splitting tests[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：881-891.(in Chinese))
[28]	何满潮，胡江春，熊伟，等. 岩石抗拉强度特性的劈裂试验分析[J]. 矿业研究与开发，2005，25(2)：12-16.(HE Manchao，HU Jiangchun，XIONG Wei，et al. Splitting test and analysis of rock tensile strength[J]. Mining Research and Development，2005，25(2)：12-16.(in Chinese))
[29]	XU X L，WU S C，GAO Y T，et al. Effects of micro-structure and micro-parameters on Brazilian tensile strength using Flat-Joint model[J]. Rock Mechanics andRock Engineering，2016，49(9)：1-21.
[30]	International Society for Rock Mechanics and Rock Engineering(ISRM). Suggested methods for determining tensile strength of rock materials[J]. International Journal of Rock MechanicsandMining Science andGeomechanics Abstracts，1978，15(15)：99-103.
[31]	GEIGER L. Probability method for the determination of earthquake epicenters from the arrival time only[J]. Bulletin of St. Louis University，1912，8(1)：60-71.
[32]	NELDER J A，MEAD R. A simple method for function minimization[J]. The Computer Journal，1965，7(4)：308-313.
[33]	SAMBRIDGE M S，KENNETT B L N. A novel method of hypocentre location[J]. Geophysical Journal International，1986，87(2)：679-697.
[34]	刘建坡，王洪勇，杨宇江，等. 不同岩石声发射定位算法及其实验研究[J]. 东北大学学报：自然科学版，2009，30(8)：1193-1196.(LIU Jianpo，WANG Hongyong，YANG Yujiang，et al. Experimental study on different rock locating algorithms with acoustic emission[J]. Journal of Northeastern University：Natural Science，2009，30(8)：1193-1196.(in Chinese))