岩石断裂过程区孕育规律与声发射特征实验研究

doi:10.13722/j.cnki.jrme.2020.0752

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Abstract In order to study the inoculation law and acoustic emission characteristics of rock fracture process zones，straight-crack disc sandstone samples were used for the split loading test on the GCTS rock test system，the real-time monitoring was performed with the help of digital image correlation method(DICM) and acoustic emission(AE) instrument，and the lengths of sample fracture process zones were obtained according to the change of the horizontal displacement of measuring lines near crack tips and the AE event locations. The theoretical value of the fracture process zone length was determined based on the high-order term of Williams series expansion as well as the revised maximum tangential stress criterion，and the failure morphology of the specimens was discussed. The results show that the average values of the fracture process zone length determined by DICM and theoretical calculation are respectively 9.07 mm and 5.19 mm，and the difference between them is due to that the theory method fails to consider the influence of the microscopic characteristics of the rock and the loading method. The load corresponding to the maximal incubation degree in the fracture process is very closer to the plastic yield point load，about 92.19%–95.47% of the peak load. The inoculation and development process of the micro-cracks of the specimen crack tips during loading is reflected by the acoustic emission signals，and the length of the specimen fracture process zone determined by the acoustic emission positioning point has good consistency with DICM. The research work is helpful to understand in depth the inoculation law of rock fracture process zones.

Key words： rock mechanics length of fracture process zone digital image correlation method acoustic emission inoculation failure mode

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	Articles by authors
	AN Dingchao1
	ZHANG Sheng1
	2
	ZHANG Xulong1
	YU Bingxin1
	WANG Hongyue1

Cite this article:

AN Dingchao1,ZHANG Sheng1,2, et al. Experimental study on incubation and acoustic emission characteristics of rock fracture process zones[J]. , 2021, 40(2): 290-301.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0752 OR http://rockmech.whrsm.ac.cn/EN/Y2021/V40/I2/290

[27]	LIN Q，LABUZ J F. Fracture of sandstone characterized by digital image correlation[J]. International Journal of Rock Mechanics and Mining Sciences，2013，60：235-245.
[19]	BA?ANT Z P，OH B H. Crack band theory for fracture of concrete[J]. Matériaux Et Construction，1983，16(3)：155-177.
[1]	赵毅鑫，龚爽，姜耀东，等. 基于半圆弯拉试验的煤样抗拉及断裂性能研究[J]. 岩石力学与工程学报，2016，35(6)：1 255-1 264. (ZHAO Yixin，GONG Shuang，JIANG Yaodong，et al. Characteristics of tensile strength and fracture properties of coal based on semi-circular bending tests[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(6)：1 255-1 264.(in Chinese))
[3]	衡帅，李贤忠，刘晓，等. 直剪条件下页岩裂缝扩展演化机制研究[J]. 岩石力学与工程学报，2019，38(12)：2 438-2 450.(HENG Shuai，LI Xianzhong，LIU Xiao，et al. Study on the propagation mechanisms of shale fractures under direct shear conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(12)：2 438-2 450.(in Chinese))
[6]	KURUPPU M D，OBARA Y，AYATOLLAHI M R，et al. ISRM-suggested method for determining the mode I static fracture toughness using semi-circular bend specimen[J]. Rock Mechanics and Rock Engineering，2014，47(1)：267-274.
[9]	TANG T X，BA?ANT Z P，YANG S，et al. Variable-notch one-size test method for fracture energy and process zone length[J]. Engineering Fracture Mechanics，1996，55(3)：383-404.
[11]	张盛，王启智. 用5种圆盘试件的劈裂试验确定岩石断裂韧度[J]. 岩土力学，2009，30(1)：12-18.(ZHANG Sheng，WANG Qizhi. Determination of rock fracture toughness by split test using five types of disc specimens[J]. Rock and soil Mechanics，2009，30(1)：12-18. (in Chinese))
[12]	张盛，王启智. 采用中心圆孔裂缝平台圆盘确定岩石的动态断裂韧度[J]. 岩土工程学报，2006，28(6)：723-728.(ZHANG Sheng，WANG Qizhi. Method for determination of dynamic fracture toughness of rock using holed-cracked flattened disk specimen[J]. Chinese Journal of Geotechnical Engineering，2006，28(6)：723-728. (in Chinese))
[17]	EVANS R H，MARATHE M S. Microcracking and stress-strain curves for concrete in tension[J]. Matériaux Et Construction，1968，1(1)：61-64.
[20]	徐世烺，赵国藩. 混凝土裂缝的稳定扩展过程与临界裂缝尖端张开位移[J]. 水利学报，1989，(4)：33-44.(XU Shilang，ZHAO Guofan. Stable propagation process of concrete crack and critical crack tip opening displacement[J]. Journal of Hydraulic Engineering，1989，(4)：33-44.(in Chinese))
[23]	TWORZEWSKI P，TEODORCZYK M，TWORZEWSKA J. Tracking of crack formation in concrete using acoustic emission method and digital image correlation[J]. IOP Conference Series Materials Science and Engineering，2019，471：1-10.
[26]	ALAM S Y，SALIBA J，LOUKILI A. Fracture examination in concrete through combined digital image correlation and acoustic emission techniques[J].Construction and Building Materials，2014，69(30)：232-242.
[7]	OUCHTERLONY F. Suggested methods for determining the fracture toughness of rock = Méthodes proposées pour déterminer la résistance des roches aux fractures[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1988，25(2)：71-96.
[15]	黄耀光，王连国，陈家瑞，等. 平台巴西劈裂试验确定岩石抗拉强度的理论分析[J]. 岩土力学，2015，36(3)：739-748.(HUANG Yaoguang，WANG Lianguo，CHEN Jiarui，et al. Theoretical analysis of flattened Brazilian splitting test for determining tensile strength of rocks[J]. Rock and soil Mechanics，2015，36(3)：739-748.(in Chinese))
[24]	TSANGOURI E，AGGELIS D G，VAN T K，et al. Detecting the activation of a self-healing mechanism in concrete by acoustic emission and digital image correlation[J]. Scientific World Journal，2013，2013：1-10.
[29]	董世明，汪洋，夏源明. 中心裂纹圆盘集中载荷作用下的应力强度因子[J]. 中国科学技术大学学报，2003，33(3)：61-68.(DONG Shiming，WANG Yang，XIA Yuanming. Stress intensity factor of a central cracked disk under concentrated load[J]. Journal of University of Science and Technology of China，2003，33(3)：61-68.(in Chinese))
[5]	马立强，张垚，孙海，等. 煤岩破裂过程中应力对红外辐射的控制效应试验[J]. 煤炭学报，2017，42(1)：140-147.(MA Liqiang，ZHANG Yao，SUN Hai，et al. Experimental study on dependence of infrared radiation on stress for coal fracturing process[J]. Journal of China Coal Society，2017，42(1)：140-147.(in Chinese))
[14]	孟京京，曹平，张科，等. 基于颗粒流的平台圆盘巴西劈裂和岩石抗拉强度[J]. 中南大学学报：自然科学版，2013，44(6)：2 449-2 454.(MENG Jingjing，CAO Ping，ZHANG Ke，et al. Brazil split test of flat-tened disk and rock tensile strength using particle flow code[J]. Journal of Central South University：Science and Technology，2013，44(6)：2 449-2 454.(in Chinese))
[22]	彭剑文. 浅海沉积石英砂岩各向异性与I型断裂尺寸效应试验研究[博士学位论文][D]. 北京：北京科技大学，2018.(PENG Jianwen. Experimental study on the anisotropy and mode I fracture size effect of shallow marine sedimentary quartz sandstone[Ph. D. Thesis][D]. Beijing：University of Science and Technology Beijing，2018.(in Chinese))
[4]	丁鑫，肖晓春，吕祥锋，等. 煤岩破裂过程声发射时-频信号特征与演化机制[J]. 煤炭学报，2019，44(10)：2 999-3 011.(DING Xin，XIAO Xiaochun，LU Xiangfeng，et al. Characteristics and evolution mechanism of acoustic emission time-frequency signal during coal failure process[J]. Journal of China Coal Society，2019，44(10)：2 999-3 011.(in Chinese))
[13]	周妍，张财贵，杨井瑞，等. 圆孔内单边(或双边)裂纹平台巴西圆盘应力强度因子的全面标定[J]. 应用数学和力学，2015，36(1)：16-30.(ZHOU Yan，ZHANG Caigui，YANG Jingrui，et al. Comprehensive calibration of stress intensity factors of Brazilian disk with unilateral(or bi-lateral) crack platform in a circular hole[J]. Applied Mathematics and Mechanics，2015，36(1)：16-30.(in Chinese))
[21]	OTSUKA K I，HIDEHUMI D. Fracture process zone in concrete tension specimen[J]. Engineering Fracture Mechanics，2000，65(2)：111-131.
[2]	杨永明，鞠杨，陈佳亮. 劈裂荷载下孔隙岩石应力分布特征与裂纹扩展行为[J]. 煤炭学报，2014，39(4)：658-665.(YANG Yongming，JU Yang，CHEN Jialiang. Distribution properties of stress and cracks propagation behavior of porous rocks during splitting[J]. Journal of China Coal Society，2014，39(4)：658-665.(in Chinese))
[28]	AYATOLLAHI M R，AKBARDOOST J. Size and geometry effects on rock fracture toughness：mode I fracture[J]. Rock Mechanics and Rock Engineering，2014，47(2)：677-687.
[10]	王启智，吴礼舟. 用平台巴西圆盘试样确定脆性岩石的弹性模量、拉伸强度和断裂韧度—第二部分：试验结果[J]. 岩石力学与工程学报，2004，23(2)：199-204.(WANG Qizhi，WU Lizhou. Determination of elastic modulus，tensile strength and fracture toughness of britle rocks by using flattened Brazilian disk specimen-part II：experimental results[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(2)：199-204.(in Chinese))
[18]	HILLERBORG A，MODEER M，PETERSSON P E. A tribute to "Analysis of Crack Formation and Crack Growth in Concrete by Means of Fracture Mechanics and Finite Elements"[J]. Cement and Concrete Research，1976，6(6)：773-781.
[8]	FOWELL R J. Suggested method for determining mode I fracture toughness using Cracked Chevron Notched Brazilian Disc(CCNBD) specimens[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1995，32(1)：57-64.
[16]	KAPLAN M F. Crack propagation and the fracture of concrete[J]. International Concrete Abstracts Portal，1961，58(11)：591-610.
[25]	ROUCHIER S，GENEVIÈVE FORAY，GODIN N，et al. Damage monitoring in fibre reinforced mortar by combined digital image correlation and acoustic emission[J]. Construction and Building Materials，2013，38：371-380.