基于临界慢化理论的细砂岩破坏前兆试验研究

doi:10.13722/j.cnki.jrme.2021.0640

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (9215 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为探究单轴荷载作用下含预制裂隙细砂岩的临界慢化特征与失稳前兆，利用MTS加载系统对不同预制裂隙角度的细砂岩开展单轴加载和同步声发射(Acoustic Emission，AE)探测试验，基于临界慢化理论方法对岩石试验损伤破坏过程的声发射特征参数(RA/AF、持续时间、上升时间)进行系统分析，研究结果表明：(1) 在单轴加载条件下，当含预制裂隙的细砂岩石从损伤破裂相态转向失稳破坏相态时，会出现分散涨落现象，即呈现明显的临界慢化现象，表现为方差和自相关系数的骤然增大。(2) 窗口长度和滞后步长对方差的前兆特征出现时间没有明显影响，而对自相关系数的波动性有较大影响，当窗口长度和滞后步长较小时，自相关系数波动较大；当窗口长度和滞后步长较大时，自相关系数波动较小。(3) 声发射RA/AF值、持续时间、上升时间的方差和自相关系数前兆信号突变时间相同，波形起伏相似，且出现在新的微裂纹萌生的不可逆塑性变形阶段，故声发射RA/AF、持续时间、上升时间的方差和自相关系数增大可作为失稳前兆特征信息。(4) 自相关系数相比方差而言波动较大，因此可将方差作为岩石损伤破坏向失稳破坏转变的主要判据，自相关系数作为辅助判据。研究成果可对滑坡、崩塌、采矿、隧道等突发性强、外部变形不明显的岩质脆性破坏的短临监测预警提供重要参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	朱星1
	2
	唐垚1
	范杰1
	胡桔维1
	刘俊峰2
	贺春蕾1

关键词 ：岩石力学, 能量释放, 预制裂隙砂岩, 岩石破坏前兆, 临界慢化理论

Abstract：In order to explore the critical slowdown characteristics and instability precursors of fine sandstone with prefabricated fractures under uniaxial loading，uniaxial loading and synchronous acoustic emission(AE) were carried out on fine sandstone samples with different prefabricated fracture angles using MTS loading system，and the acoustic emission characteristic parameters(RA/AF value，duration and rising time) in the damage and failure processes of rock were systematically analyzed based on the critical slowing down theory method. The results indicated that, under uniaxial loading，there will be a dispersion fluctuation phenomenon when the fine sandstone with prefabricated cracks changes from fracture damage to instability failure，that is，an obvious critical slowing down phenomenon，which is manifested by the sudden increase of the variance and the autocorrelation coefficient. The window length and the lag step have no significant effect on the precursory characteristics of the variance，but have a great influence on the volatility of the autocorrelation coefficient. When the window length and the lag step are small，the autocorrelation coefficient fluctuates greatly. When the window length and the lag step length are large，the autocorrelation coefficient fluctuates less. The variances of RA/AF value，duration and rising time are the same as the mutation time of autocorrelation coefficient precursor signals，and the waveform fluctuations are also similar，which appears in the irreversible plastic deformation stage of new microcrack initiation. Therefore，the variances of RA/AF value，duration and rising time，and the increase of the autocorrelation coefficient of AE can be used as the precursor characteristics of instability. The autocorrelation coefficient fluctuates greatly compared with the variance. Therefore，the variance can be used as the main criterion for rock damage to instability，and the autocorrelation coefficient can be used as the auxiliary criterion. In summary，the research results can provide important reference for the short-term monitoring and early warning of rock brittle failure with sudden strong and weak external deformation such as landslide，collapse，mining and tunnel.

Key words： rock mechanics energy release prefabricated fractured sandstone rock damage precursors critical slowing down theory

基金资助:

引用本文:

朱星1，2，唐垚1，范杰1，胡桔维1，刘俊峰2，贺春蕾1. 基于临界慢化理论的细砂岩破坏前兆试验研究[J]. 岩石力学与工程学报, 2022, 41(1): 53-61.
ZHU Xing1，2，TANG Yao1，FAN Jie1，HU Juwei1，LIU Junfeng2，HE Chunlei1. Experimental study on failure precursors of fine sandstone based on critical slowing down theory. , 2022, 41(1): 53-61.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0640 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I1/53

[1]	LIN Q，CAO P，WEN G，et al. Crack coalescence in rock-like specimens with two dissimilar layers and pre-existing double parallel joints under uniaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，2021，139：104621.
[3]	姜德义，张水林，陈结，等. 砂岩循环冻融损伤的低场核磁共振与声发射概率密度研究[J]. 岩土力学，2019，40(2)：436-444.(JIANG Deyi，ZHANG Shuilin，CHEN Jie，et al. Low filed NMR and acoustic emission probability density study of freezing and thawing cycles damage for sandstone[J]. Rock and Soil Mechanics，2019，40(2)：436-444.(in Chinese))
[5]	ZHANG Z，LIU X，ZHANG Y，et al. Comparative study on fracture characteristics of coal and rock samples based on acoustic emission technology[J]. Theoretical and Applied Fracture Mechanics，2021，111：102851.
[6]	陈竑然，薛雷，秦四清. 锁固段体积膨胀点的声发射事件能级特征[J]. 华北水利水电大学学报：自然科学版，2018，39(6)：19-24.(CHEN Hongran，XUE Lei，QIN Siqing. Acoustic emission event energy level characteristics of volume expansion point in locking section[J]. Journal of North China University of Water Resource sand Electric Power：Natural Science，2018，39(6)：19-24.(in Chinese))
[11]	WEI Y，LI Z H，KONG X G，et al. The precursory information of acoustic emission during sandstone loading based on critical slowing down theory[J]. Journal of Geophysics and Engineering，2018，15(5)：2 150-2 158.
[2]	姚欢迎，陈军斌，聂向荣，等. 单轴压缩声发射试验的页岩损伤演化规律[J]. 科学技术与工程，2020，20(4)：1 581-1 586.(YAO Huanying，CHEN Junbin，NIE Xiangrong，et al. Evolution of shale damage in uniaxial compression acoustic emission tests[J]. Science Technology and Engineering，2020，20(4)：1 581-1 586.(in Chinese))
[12]	魏洋，李忠辉，孔祥国，等. 砂岩单轴压缩破坏的临界慢化特征[J]. 煤炭学报，2018，43(2)：427-432.(WEI Yang，LI Zhonghui，KONG Xiangguo，et al. Critical slowing characteristics of sandstone under uniaxial compression failure[J]. Journal of China Coal Society，2018，43(2)：427-432.(in Chinese))
[22]	田贺，李忠辉，殷山，等．煤样单轴压缩破坏红外温度临界慢化前兆研究[J]. 煤矿安全，2020，51(3)：38-43.(TIAN He，LI Zhonghui，YIN Shan，et al. Study on precursor of infrared temperature critical slowing in coal sample uniaxial compression failure[J]. Safety in Coal Mines，2020，51(3)：38-43.(in Chinese))
[13]	KONG X G，WANG E Y，HU S B，et al. Critical slowing down on acoustic emission characteristics of coal containing methane[J]. Journal of Natural Gas Science and Engineering，2015，24：156-165.
[16]	谢和平，鞠杨，黎立云. 基于能量耗散与释放原理的岩石强度与整体破坏准则[J]. 岩石力学与工程学报，2005，24(17)：3 003-3 010. (XIE Heping，JU Yang，LI Liyun. Critela for strength and structural failure of rocks based on energy dissipation and energy release principles[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 003-3 010.(in Chinese))
[19]	王桂林，文兴祥，张亮. 单轴压缩下节理砂岩能量演化机制倾角效应[J]. 中南大学学报：自然科学版，2020，51(7)：1 913-1 923. (WANG Guilin，WEN Xingxiang，ZHANG Liang. Dip effect of energy evolution mechanism of jointed sandstone under uniaxial compression[J]. Journal of Central South University：Science and Technology，2020，51(7)：1 913-1 923.(in Chinese))
[21]	葛振龙，孙强，王苗苗，等. 基于RA/AF的高温后砂岩破裂特征识别研究[J]. 煤田地质与勘探，2021，49(2)：176-183.(GE Zhenlong，SUN Qiang，WANG Miaomiao，et al. Fracture feature recognition of sandstone after high temperature based on RA/AF[J]. Coal Geology and Exploration，2021，49(2)：176-183.(in Chinese))
[23]	ALI S M，HUI K H，HEE L M，et al. Observations of changes in acoustic emission parameters for varying corrosion defect in reciprocating compressor valves[J]. Ain Shams Engineering Journal，2019，10(2)：253-265.
[4]	吴刚，何国梁，张磊，等. 大理岩循环冻融试验研究[J]. 岩石力学与工程学报，2006，25(增)：2 930-2 938.(WU Gang，HE Guoliang，ZHANG Lei，et al. Experimental study on cycles of freeze-thaw of marble[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.)：2 930-2 938.(in Chinese))
[14]	ZHANG X，LI Z H，NIU Y，et al. An experimental study on the precursory of EP before sandstone failure based on critical slowing down[J]. Journal of Applied Geophysics，2019，170：103818.
[10]	VAN DE LEEMPUT I A，WICHERS M，CRAMER A O J，et al. Critical slowing down as early warning for the onset and termination of depression[J]. Proceedings of the National Academy of Sciences，2014，111(1)：87-92.
[20]	解经宇，陆洪智，陈磊，等. 龙马溪组层状页岩微观非均质性及力学各向异性特征[J]. 地质科技通报，2021，40(3)：66-77.(XIE Jingyu，LU Hongzhi，CHEN Lei，et al. Micro scopic heterogeneity and mechanical anisotropy of the laminated shale in Longmaxi formation[J]. Bulletin of Geological Science and Technology，2021，40(3)：66-77.(in Chinese))
[7]	吴顺川，甘一雄，任义，等. 基于RA与AF值的声发射指标在隧道监测中的可行性[J]. 工程科学学报，2020，42(6)：723-730.(WU Shunchuan，GAN Yixiong，REN Yi，et al. Feasibility research of AE monitoring index in tunnel based on RA and AF[J]. Chinese Journal of Engineering，2020，42(6)：723-730.(in Chinese))
[17]	王桂林，文兴祥，张亮. 单轴压缩下节理砂岩能量演化机制倾角效应[J]. 中南大学学报：自然科学版，2020，51(7)：1 913-1 923. (WANG Guilin，WEN Xingxiang，ZHANG Liang. Dip effect of energy evolution mechanism of jointed sandstone under uniaxial compression[J]. Journal of Central South University：Science and Technology，2020，51(7)：1 913-1 923.(in Chinese))
[8]	刘希灵，刘周，李夕兵，等. 劈裂荷载下的岩石声发射及微观破裂特性[J]. 工程科学学报，2019，41(11)：1 422-1 432.(LIU Xiling，LIU Zhou，LI Xibing，et al. Acoustic emission and micro-rupture characteristics of rocks under Brazilian splitting load[J]. Chinese Journal of Engineering，2019，41(11)：1 422-1 432.(in Chinese))
[18]	张志婷，潘元贵，蒋炳，等. 开放性裂隙岩石三轴加载破坏前兆信息[J]. 科学技术与工程，2021，21(6)：2 202-2 209.(ZHANG Zhiting，PAN Yuangui，JIANG Bing，et al. Precursory information of triaxial loading failure of open fractured rock[J]. Science Technology and Engineering，2021，21(6)：2 202-2 209.(in Chinese))
[15]	ZHANG Z H，LI Y C，HU L H，et al. Predicting rock failure with the Critical Slowing down Theory[J]. Engineering Geology，2021，280：105960.
[9]	MATURANA M I，MEISEL C，DELL K，et al. Critical slowing down as a biomarker for seizure susceptibility[J]. Nature Communications 2020，11(1)：1-12