不同频率增幅疲劳荷载下双裂隙花岗岩破裂演化声发射特性与裂纹形态研究

doi:10.13722/j.cnki.jrme.2020.0729

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (4470 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to reveal the effect of dynamic loading frequency on fracture evolution characteristics of pre-flawed rocks，GCTS-RTR 2000 rock mechanics testing system，in-situ acoustic emission monitoring and post-test CT scanning were employed to carry out increasing-amplitude fatigue loading experiments on rock samples with an approaching angle of 50°. Testing results show that the strength，deformation and fatigue life increase with increasing the dynamic loading frequency. The growth rate of the volumetric strain shows a trend from steady increase to sudden increase，and at the final fatigue loading stage，the deformation increases sharply until the sample fails. AE count，AE energy change and crack propagation behavior are controlled by the dynamic loading frequency. The accumulative AE count and AE energy increase with increasing the loading frequency. The AE spectral frequency analysis reveals six kinds of crack types. The crack size is negatively correlated with the frequency and the proportion of the high frequency-high amplitude signal decreases with increasing the frequency, indicating that large-scaled cracks are prone to form under high loading frequency. CT images show that the scale of the crack network at the rock bridge segment increasing with increasing the loading frequency，and the coalescence of the pre-flaws easily occurs for rock subjected to low dynamic loading frequency conditions while is difficult under a high dynamic loading frequency. The testing results are helpful to improve the understanding of the influence of the dynamic frequency on the fatigue mechanical properties and the crack evolution behavior under increasing-amplitude fatigue loading and provide necessary theoretical basis for the monitoring and warning of structural deterioration，pattern recognition and long-term stability of rock mass under increasing-amplitude fatigue loading.

Key words： rock mechanics increasing-amplitude fatigue loading fractured rocks fracture evolution acoustic emission CT scan

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Yu1
	GAO Shaohua1
	MENG Huajun2
	LONG Dayu1

Cite this article:

WANG Yu1,GAO Shaohua1,MENG Huajun2, et al. Investigation on acoustic emission characteristics and fracture network patterns of pre-flawed granite subjected to increasing-amplitude fatigue loads[J]. , 2021, 40(10): 1976-1989.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0729 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I10/1976

[1] CERFONTAINE B，COLLIN F. Cyclic and fatigue behaviour of rock materials：review，interpretation and research perspectives[J]. Rock Mechanics and Rock Engineering，2018，51(2)：391–414.
[2] 李西蒙，刘长友，SYD S，等. 单轴分级循环加载条件下砂岩疲劳变形特性与损伤模型研究[J]. 中国矿业大学学报，2017，46(1)：8–17.(LI Ximeng，LIU Changyou，SYD S，et al. Fatigue deformation characteristics and damage model of sandstone subjected to uniaxial step cyclic loading[J]. Journal of China University of Mining and Technology，2017，46(1)：8–17.(in Chinese))
[3] TAHERI A，SQUIRES J，MENG Z，et al. Mechanical properties of brown coal under different loading conditions[J]. International Journal of Geomechanics，2017，17(11)：110–119.
[4] WANG Y，GAO S H，LIU D Q，et al. Anisotropic fatigue behaviour of interbeded marble subjected to uniaxial cyclic compressive loads[J]. Fatigue and Fracture of Engineering Materials and Structures，2020，65：1–14.
[5] 葛修润. 周期荷载下岩石大型三轴试件的变形和强度特性研究[J]. 岩土力学，1987，8(2)：11–19.(GE Xiurun. Study of deformation and strength behavior of the large-sized triaxial rock samples under cyclic loading[J]. Rock and Soil Mechanics，1987，8(2)：11–19.(in Chinese))
[6] 葛修润，蒋宇，卢允德，等. 周期荷载作用下岩石疲劳变形特性试验研究[J]. 岩石力学与工程学报，2003，22(10)：1 581–1 585.(GE Xiurun，JIANG Yu，LU Yunde，et al. Testing study on fatigue deformation law of rock under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(10)：1 581–1 585.(in Chinese))
[7] 刘涛，杨鹏，吕文生，等. 岩石在不同应力幅值下受低频循环扰动的力学特性试验[J]. 煤炭学报，2017，42(9)：2 280–2 286.(LIU Tao，YANG Peng，LV Wensheng，et al. Rock mechanical properties experiments with low-frequency circulation disturbance under different stress amplitudes[J]. Journal of China Coal Society，2017，42(9)：2 280–2 286.(in Chinese))
[8] 赵凯，乔春生，罗富荣，等. 不同频率循环荷载下石灰岩疲劳特性试验研究[J]. 岩石力学与工程学报，2014，33(增2)：3 466–3 475. (ZHAO Kai，QIAO Chunsheng，LUO Furong，et al. Experimental study of fatigue characteristics of limestone samples subjected to uniaxial cyclic loading with different frequencies[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 466–3 475. (in Chinese))
[9] 邓华锋，胡玉，李建林，等. 循环荷载的频率和幅值对砂岩动力特性的影响[J]. 岩土力学，2017，38(12)：3 402–3 409.(DENG Huafeng，HU Yu，LI Jianlin，et al. Effects of frequency and amplitude of cyclic loading on the dynamic characteristics of sandstone[J]. Rock and Soil Mechanics，2017，38(12)：3 402–3 409.(in Chinese))
[10] PENG K，ZHOU J Q，ZOU Q L，et al. Effect of loading frequency on the deformation behaviours of sandstones subjected to cyclic loads and its underlying mechanism[J]. International Journal of Fatigue，2019，131：105349.
[11] 李地元，胡楚维，朱泉企. 预制裂隙花岗岩动静组合加载力学特性和破坏规律试验研究[J]. 岩石力学与工程学报，2020，39(6)：1 081–1 093.(LI Diyuan，HU Chuwei，ZHU Quanqi. Experimental study on mechanical properties and failure laws of granite with an artificial flaw under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(6)：1 081–1 093. (in Chinese))
[12] 钟助. 裂隙岩体边坡岩桥破坏机制及稳定性研究[博士学位论文][D]. 重庆：重庆大学，2019.(ZHONG Zhu. Study on the failure mechanism of rock bridges in a jointed rock slope and evaluation on its stability[Ph. D. Thesis][D]. Chongqing：Chongqing University，2019.(in Chinese))
[13] 陈国庆，刘辉，秦昌安，等. 中部锁固岩桥三轴加卸荷力学特性及裂纹扩展研究[J]. 岩石力学与工程学报，2017，36(5)：1 162–1 173. (CHEN Guoqing，LIU Hui，QIN Chang'an，et al. Mechanical properties and crack model of central rock bridge in triaxial unloading test[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(5)：1 162–1 173.(in Chinese))
[14] 王述红，王子和，王凯毅，等. 循环荷载下含双裂隙砂岩弹性模量的演化规律[J]. 东北大学学报：自然科学版，2020，41(2)：282–286. (WANG Shuhong，WANG Zihe，WANG Kaiyi，et al. Evolution law of elastic modulus of sandstone with double fissures under cyclic loading[J]. Journal of Northeastern University：Natural Science，2020，41(2)：282–286.(in Chinese))
[15] 李润，简文彬. 含裂隙类岩试样疲劳劣化试验研究[J]. 地下空间与工程学报，2015，11(增2)：429–435.(LI Run，JIAN Wenbin. Experimental study on the fatigue degradation of fractured rocklike specimens[J]. Chinese Journal of Underground Space and Engineering，2015，11(Supp.2)：429–435.(in Chinese))
[16] ROBERTS L A，BUCHHOLZ S A，MELLEGARD K D，et al. Cyclic loading effects on the creep and dilation of salt rock[J]. Rock Mechanics and Rock Engineering，2015，48(6)：2 581–2 590.
[17] MOHANTY B，CHUNG S. Production blasting and slope stability[C]// Proceedings of the International Symposium on Geotechnical Stability in Surface Mining. Calgary：Canmet，1986：256–267.
[18] LUPOGO K. Characterization of blast damage in rock slopes：an integrated field-numerical modeling approach[Ph. D. Thesis][D]. British Columbia：Simon Fraser University，2017.
[19] BAGDE M N，PETROS V. Waveform effect on fatigue properties of intact sandstone in uniaxial cyclical loading[J]. Rock Mechanics and Rock Engineering，2005，38(3)：169–196.
[20] LI N，CHEN W，ZHANG P，et al. The mechanical properties and a fatigue-damage model for jointed rock masses subjected to dynamic cyclical loading[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(7)：1 071–1 079.
[21] WANG Y，LI C H，HU Y Z. Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression[J]. Geophysical Journal International，2018，213(1)：660–675.
[22] 李庶林，周梦婧，高真平，等. 增量循环加卸载下岩石峰值强度前声发射特性试验研究[J]. 岩石力学与工程学报，2019，38(4)：724–735.(LI Shulin，ZHOU Mengjing，GAO Zhenping，et al. Experimental study on acoustic emission characteristics before the peak strength of rocks under incrementally cyclic loading-unloading methods[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：724–735.(in Chinese))
[23] LI L R，DENG J H，ZHENG L，et al. Dominant frequency characteristics of acoustic emissions in white marble during direct tensile tests[J]. Rock Mechanics and Rock Engineering，2017，50(5)：1–10.
[24] 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))
[25] HE M C，MIAO J L，FENG J L. Rock burst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47(2)：286–298.
[26] 朱振飞，陈国庆，肖宏跃，等. 基于声发射多参量分析的岩桥裂纹扩展研究[J]. 岩石力学与工程学报，2018，37(4)，909–918.(ZHU Zhenfei，CHEN Guoqing，XIAO Hongyue，et al. Study on crack propagation of rock bridge based on multi parameters analysis of acoustic emission[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(4)：909–918.(in Chinese))
[27] WANG Y，FENG W K，WANG H J，et al. Geomechanical and acoustic properties of intact granite subjected to freeze-thaw cycles during water-ice phase transformation in Beizhan¢s open pit mine slope，Xinjiang，China[J]. Water，2019，11(11)：2 309.
[28] 王创业，常新科，刘沂琳，等. 单轴压缩条件下大理岩破裂过程声发射频谱演化特征实验研究[J]. 岩土力学，2020，41(增1)：51–62. (WANG Chuangye，CHANG Xinke，LIU Yilin，et al. Spectrum evolution characteristics of acoustic emission during the rupture process of marble under uniaxial compression condition[J]. Rock and Soil Mechanics，2020，41(Supp.1)：51–62.(in Chinese))
[29] MOGI K. Earthquake prediction program in Japan[M]. Tokyo：Earthquake Prediction，American Geophysical Union (AGU)，2013.
[30] 张艳博，梁鹏，刘祥鑫，等. 基于多参量归一化的花岗岩巷道岩爆预测试验研究[J]. 岩土力学，2016，37(1)：96–104.(ZHANG Yanbo，LIANG Peng，LIU Xiangxin，et al. An experimental study of predicting rockburst in granitic roadway based on multiparameter normalization[J]. Rock and Soil Mechanics，2016，37(1)：96–104.(in Chinese))
[31] 张艳博，梁鹏，孙林，等. 单轴压缩下饱水花岗岩破裂过程声发射频谱特征试验研究[J]. 岩土力学，2019，40(7)：2 497–2 506. (ZHANG Yanbo，LIANG Peng，SUN Lin，et al. Experimental study on spectral characteristics of AE in the process of saturated granite fracture under uniaxial compression[J]. Rock and Soil Mechanics，2019，40(7)：2 497–2 506.(in Chinese))
[32] WANG Y，LI C H，HU Y Z. Experimental investigation on the fracture behaviour of black shale by acoustic emission monitoring and CT image analysis during uniaxial compression[J]. Geophysical Journal International，2018，213(1)：660–675.
[33] WANG Y，LI C H，HU Y Z. Use of X-ray computed tomography to investigate the effect of rock blocks on meso-structural changes in soil-rock mixture under triaxial deformation[J]. Construction and Building Materials，2018，164：386–399.
[34] OHNAKA M，MOGI K. Frequency characteristics of acoustic emission in rocks under uniaxial compression and its relation to the fracturing process to failure[J]. Journal of Geophysical Research：Solid Earth，1982，87(B5)：3 873–3 884.
[35] WANG Z，NING J，REN H. Frequency characteristics of the released stress wave by propagating cracks in brittle materials[J]. Theoretical and Applied Fracture Mechanics，2018，96：72–82.