基于声发射时空演化的岩石全应力–应变曲线阶段特征分析

doi:10.13722/j.cnki.jrme.2018.0594

Abstract
Figure/Table
References (26)
Related Citation (0)

Download: PDF (1647 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

It is important to understand the stage division and its AE characteristics during rock deformation process. This helps when making prediction about the rock¢s stress state. With an example of siltstone，the AE characteristics for each of seven stages of the whole stress-strain curve were given in this paper. AE characteristics applied for this purpose were combined by three aspects. They are curves of AE events accumulation vs. time，AE frequency distribution scattering vs. time and AE events locations in rock space by stages. For convenience to making more accurate descriptions of AE temporal-spatial evolution，some definitions of typical characteristics for the above three AE aspects were given firstly. According to their geometric form, the AE characteristics were described as AE platform，AE multistep upward，band of major frequency，cutting frequency，intensive gathering，etc.. Secondly, experiments of monitoring and 3D location of acoustic emission(AE) were carried out on siltstone during its deformation under uniaxial compression. It is investigated temporal-spatial evolution characteristics of AE in each stage of the process. It was found to be identifiable for each of the seven stages by application of the three combining AE properties. Upon meso-mechanical analysis，the comprehensive evolution state of AE may be greatly influenced by fracturing mechanism. This mechanism is determined by local stress state in rock and sizes and azimuth of the original fissures therein. Similar to process of elastic rebound in earthquake，the process of shear localization in rock was formed by AE events gathering around micro structure therein during the softening stage(the 4th stage). This leads to stress drop with major fracturing in rock. Then more AEs were triggered by meso-fracturing process with release of strain energy during elastic rebound. Thus the combining three AE properties in the 4th stage，i.e. AE platform，AE multistep upward，band of major frequency in a line shape with cutting frequencies，AE intensive gathering in several zones of rock space，would be taken as precursors prior to rock failure. Finally，the three combining AE properties were compared on other three different kinds of rocks. It was concluded that AE properties were controlled by triggering process of ultrasonic with meso-fracturing. The harder and bigger the mineral particles，stronger cementation between them，and more micro structures distributed in rock homogeneously，the more AE events，more frequency bands and cutting frequencies produce. Therefore，it is necessary to investigate systematically influences of meso-fracturing by rock¢s micro structure when applying AE properties to monitoring and indentifying stress state of rock during its loading process.

Key words： rock mechanics rock failure acoustic emission whole stress-strain curve frequency meso-mechanism

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DENG Xubiao
	LIU Yuanzheng
	XING Kuang
	YU Huaichang

Cite this article:

DENG Xubiao,LIU Yuanzheng,XING Kuang, et al. Analysis based on AE space-time evolution characteristics for stage division of whole stress-strain curve of rock[J]. , 2018, 37(S2): 4086-4099.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0594 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/4086

[1] 蔡美峰，何满潮，刘东燕. 岩石力学与工程[M]. 北京：科学出版社，2002：12–17.(CAI Meifeng，HE Manchao，LIU Dongyan. Rock mechanics and engineering[M]. Beijing：Science Press，2002：12–17.(in Chinese))

[2] EBERHARDT E，STIMPSON B，STEAD D. Effects of grain size on the initiation and propagation thresholds of stress-induced brittle fractures[J]. Rock Mechanics and Rock Engineering，1999，32(2)：81–99.

[3] CAI M，KAISER P K，TASAKA Y，et al. Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(5)：833–847.

[4] 张国凯，李海波，夏祥，等. 单轴加载条件下花岗岩声发射及波传播特性研究[J]. 岩石力学与工程学报，2017，36(5)：1 133– 1 144.(ZHANG Guokai，LI Haibo，XIA Xiang，et al. Experiment study on acoustic emission and wave propagation in granite under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(5)：1 133–1 144.(in Chinese))

[5] MARTIN C D，CHANDLER N. The progressive fracture of Lac du Bonnet granite[J]. International Journal of Rock Mechanics and Mining Science and Geomechanics Abstracts，1994，31(6)：643–659.

[6] LI D Y，CLI C L，LI X B. Influence of sample height-to-width ratios on failure mode for rectangular prism samples of hard rock loaded in uniaxial compression[J]. Rock Mechanics and Rock Engineering，2011，44(10)：253–267.

[7] KATSUYAMA K. Application of AE techniques[M]. Translated by FENG X T. Beijing：China Metallurgical Industry Press，1996：8–110.

[8] 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.(YIN Zhenggang. Experimental study on aeoustic emission and damage during the failure of rock[M. S. Thesis][D]. Changsha：Central South University，2005.(in Chinese))

[9] DENG X B，DU W F，XU G. Physical model for rockburst based on acoustic emission[C]// the 7th International Symposium on Rockburst and Seismicity in Mines.[S. l.]：[s. n.]，2009：1 597–1 604.

[10] THAM L G，LIU H，TANG C A，et al. On tension failure of 2d rock specimens and associated acoustic emission[J]. Rock Mechanics and Rock Engineering，2005，38 (1)：1–19.

[11] 赵兴东，李元辉，刘建坡，等. 基于声发射及其定位技术的岩石破裂过程研究[J]. 岩石力学与工程学报，2008，27(5)：990–995.(ZHAO Xingdong，LI Yuanhui，LIU Jianpo，et al. Study on rock failure process based on acoustic emission and its location technique[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(5)：990–995.(in Chinese))

[12] LEI XL，MASUDA K，NISHIZAWA O，et al. Three typical stages of acoustic emission activity during the catastrophic fracture of heterogeneous faults in jointed rocks[J]. Journal of Structural Geology，2004，26：247–258.

[13] 何满潮，赵菲，张昱，等. 瞬时应变型岩爆模拟试验中花岗岩主频特征演化规律分析[J]. 岩土力学，2015，36(1)：1–8.(HE Mancao，ZHAO Fei，ZHANG Yi，et al. Feature evolution of dominant frequency components in acoustic emissions of instantaneous strain-type granitic rockburst simulation tests[J]. Rock and Soil Mechanics，2015，36(1)：1–8.(in Chinese))

[14] 纪洪广，卢翔. 常规三轴压缩下花岗岩声发射特征及其主破裂前兆信息研究[J]. 岩石力学与工程学报，2015，34(4)：694–702.(JI Hongguang，LU Xiang. Characteristics of acoustic emission and rock fracture precursors of granite under conventional triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(4)：694–702.(in Chinese))

[15] 张艳博，梁鹏，田宝柱，等. 花岗岩灾变声发射信号多参量耦合分析及主破裂前兆特征试验研究[J]. 岩石力学与工程学报，2016，35(11)：2 248–2 258.(ZHANG Yanbo，LIANG Peng，TIAN Baozhu，et al. Multi parameter coupling analysis of acoustic emission signals of granite disaster and the precursor characteristics of the main rupture[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(11)：2 248–2 258.(in Chinese))

[16] 凌建明. 压缩荷载条件下岩石细观损伤特征的研究[J]. 同济大学学报，1993，21(2)：219–226.(LING Jianming. Study on meso damage characteristics of rock under compression loading[J]. Journal of Tongji University，1993，21(2)：219–226.(in Chinese))

[17] SERGEI S，JEROME F，GEORG D. Ultrasonic velocities，acoustic emission characteristics and crack damage of basalt and granite[J]. Pure and Applied Geophysics，2006，163(6)：974–993.

[18] 刘力强，马胜利，马瑾，等. 岩石构造对声发射统计特征的影响[J]. 地震地质，1999，21(4)：377–384.(LIU Liqiang，MA Shengli，MA Jin，et al. Effect of rock structure on the statistic characteristics of acoustic emission[J].Seismology and Geology，1999，21(4)：377–384.(in Chinese))

[19] 赵兴东，李元辉，袁瑞甫，等. 基于声发射定位的岩石裂纹动态演化过程研究[J]. 岩石力学与工程学报，2007，26(5)：944–950.(ZHAO Xingdong，LI Yuanhui，YUAN Ruifu，et al. Study on dynamic evolution process of rock based on AE location [J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：944–950.(in Chinese))

[20] 刘建坡，徐世达，李元辉，等. 预制孔岩石破坏过程中的声发射时空演化特征研究[J]. 岩石力学与工程学报，2012，31(12)：2 538– 2 547.(LIU Jianpo，XU Shida，LI Yuanhui，et al. Studies of AE time-space evolution characteristics during failure process of rock specimens with prefabricated holes[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31 (12)：2 538–2 547.(in Chinese))

[21] 孙强，张卫强，薛雷，等. 砂岩损伤破坏的声发射准平静期特征分析[J]. 采矿与安全工程学报，2013，30(2)：237–242.(SUN Qiang，ZHANG Weiqiang，XUE Lei，et al. Acoustic emission characteristics in quasi-quiet stage of damage and fracture of sandstone[J]. Journal of Mining and Safety Engineering，2013，30(2)：237–242.(in Chinese))

[22] 邓绪彪，胡海娟，徐刚，等. 两体岩石结构冲击失稳破坏的数值模拟[J]. 采矿与安全工程学报，2012，29(6)：833–839.(DENG Xubiao， HU Haijuan，XU Gang，et al. Numerical simulation for burst failure of two-body rock structure[J]. Journal of Mining and Safety Engineering，2012，29(6)：833–839.(in Chinese))

[23] 左建平，周宏伟，范雄，等. 三点弯曲下热处理北山花岗岩的断裂特性研究[J]. 岩石力学与工程学报，2013，32(12)：2 422–2 430. (ZUO Jianping，ZHOU Hongwei，FAN Xiong，et al. Research on fracture behavior of Beishan granite after heat treatment under three-point bending[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(12)：2 422–2 430.(in Chinese))

[24] 刘力强，马胜利，马瑾，等.不同结构标本声发射b值和频谱的时间扫描及其物理意义[J]. 地震地质，2001，23(4)：481–492.(LIU Liqiang，MA Shengli，MA Jin，et al. Temporal scanning of b value and spectrum of AE activity for samples with different textures and their physical implications[J]. Seismology and Geology，2001，23(4)：481–492.(in Chinese))

[25] 杨圣奇，刘相如，李玉寿. 单轴压缩下含孔洞裂隙砂岩力学特性试验分析[J]. 岩石力学与工程学报，2012，31(增2)：3 539–3 546. (YANG Shengqi，LIU Xiangru，LI Yushou. Experimental analysis of mechanical behavior of sandstone containing hole and fissure under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.2)：3 539–3 546.(in Chinese))

[26] PRIKRYL R，LOKAJICEK T，LI C，et al. Acoustic emission characteristics and failure of uniaxially stressed granitic rocks：the effect of rock fabric[J]. Rock Mechanics and Rock Engineering，2003，36(4)：255–270.