Study on Brittle Damage Evolution and Acoustic Emission Characteristics of Limestone

  • Yang Donghui ,
  • Qiao Wei ,
  • Su Jingwei ,
  • Cheng Hongming ,
  • Ning Zhangxuan
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  • 1. School of Coal Engineering, Shanxi Datong University, Datong, Shanxi 037003, P.R. China;
    2. The Cultivation Base of Shanxi Key Laboratory of Coal Mine Water Jet Technology and Equipment, Shanxi Datong University, Datong, Shanxi 0370031, P.R. China

Received date: 2024-04-17

  Online published: 2024-10-31

Abstract

Brittleness is one of the most important mechanical properties in deep rock mass. In order to study the brittle damage evolution mechanism of limestone, the acoustic emission test of limestone under uniaxial compression was carried out, and the relationship between brittleness index and damage variable and b-value was analyzed. The results show that: (1) The ratios of crack closure stress, crack initiation stress and damage stress to peak stress in limestone are 31.3 %, 43.0 % and 85.5 %, respectively. (2) The average brittleness index of limestone is 0.32, and the mean square error is 0.009. With the increase of brittleness index, the damage variable corresponding to the characteristic stress gradually decreases, and the damage variable gradually increases from ‘proportional function’ to ‘concave power function’. The damage acceleration phenomenon exists in the critical failure stage. (3) Under the condition of uniaxial compression, with the increase of brittleness index, the shear failure of limestone decreases and the tensile failure increases, and the brittleness index can better characterize its failure mode. (4) There are four obvious stages in the cumulative ringing count, cumulative energy, cumulative amplitude and time curve of acoustic emission in limestone: slight increase period, quiet period, steep increase period and sharp decrease period. The amplitude of quiet period is less than 80 dB, and the curve shows a step-like upward trend. The larger the brittleness index, the longer the quiet period, the shorter the sharp increase period, and the greater the ratio of the stress corresponding to the b value to the peak stress. (5) The b-value curve shows a trend of rising first and then falling, and the b-value abrupt points are all before the end of the quiet period. These two points can accurately warn the instability and failure of limestone. With the increase of brittleness index, the b-value abrupt point appears later and closer to the peak. The research results provide important reference for surrounding rock stability control and dynamic disaster monitoring and early warning.

Cite this article

Yang Donghui , Qiao Wei , Su Jingwei , Cheng Hongming , Ning Zhangxuan . Study on Brittle Damage Evolution and Acoustic Emission Characteristics of Limestone[J]. Chinese Journal of Underground Space and Engineering, 2024 , 20(5) : 1491 -1502 . DOI: 10.20174/j.JUSE.2024.05.08

References

[1] 袁亮. 深部采动响应与灾害防控研究进展[J]. 煤炭学报, 2021, 46(3): 716-725. (Yuan Liang. Research progress of deep mining response and disaster prevention[J]. Journal of China Coal Society, 2021, 46(3): 716-725. (in Chinese))
[2] 谢和平. 深部岩体力学与开采理论研究进展[J]. 煤炭学报, 2019, 44(5): 1283-1305. (Xie Heping. Research progress of deep rock mechanics and mining theory[J]. Journal of China Coal Society, 2019, 44(5): 1283-1305. (in Chinese))
[3] 周亚萍, 姜海波. 深埋高地应力水工隧洞地应力特征及岩爆脆性破坏深度预测研究[J]. 隧道建设(中英文), 2022, 42(增1): 321-330. (Zhou Yaping, Jiang Haibo. Study on characteristics of ground stress and prediction of brittle failure depth of rock burst in deep buried high ground stress hydraulic tunnel[J]. Tunnel Construction, 2022, 42(Supp.1): 321-330. (in Chinese))
[4] Yang D H, Yang B H, Lv Z H, et al. Numerical simulation of the stress field in repeated mining of coal seams based on in situ stress measurement [J]. Mathematical Problems in Engineering, 2021, 46: 3588868.
[5] Meng Q B, Liu J F, Ren L, et al. Experimental study on rock strength and deformation characteristics under triaxial cyclic loading and unloading conditions[J]. Rock Mechanics and Rock Engineering, 2021, 54(2): 777-797.
[6] 方正峰, 邹飞, 唐旭. 冲击荷载作用下灰岩的能量耗散及损伤演化规律研究[J]. 地下空间与工程学报, 2020, 16(2): 475-483. (Fang Zhengfeng, Zhou Fei, Tang Xu. Study on energy dissipation and damage evolution law of limestone under impact load[J]. Journal of Underground Space and Engineering, 2020, 16(2): 475-483. (in Chinese))
[7] 赵光明, 张小波, 孟祥瑞, 等.基于连续损伤理论的巷道围岩弹脆性损伤分析[J]. 地下空间与工程学报, 2016, 12(2): 314-320, 335. (Zhao Guangming, Zhang Xiaobo, Meng Xiangrui, et al. Elastic-brittle damage analysis of roadway surrounding rock based on continuous damage theory[J]. Chinese Journal of Underground Space and Engineering, 2016, 12(2): 314-320, 335. (in Chinese))
[8] 李天斌, 高美奔, 陈国庆, 等.硬脆性岩石热—力—损伤本构模型及其初步运用[J]. 岩土工程学报, 2017, 39(8): 1477-1484. (Li Tianbin, Gao Meiben, Chen Guoqing, et al. Thermal-mechanical-damage constitutive model of hard brittle rock and its preliminary application[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(8): 1477-1484. (in Chinese))
[9] 蒋维, 邓建, 李隐. 基于对数正态分布的岩石损伤本构模型研究[J]. 地下空间与工程学报, 2010, 6(6): 1190-1194. (Jiang Wei, Deng Jian, Li Yin. Study on rock damage constitutive model based on logarithmic normal distribution[J]. Chinese Journal of Underground Space and Engineering, 2010, 6(6): 1190-1194. (in Chinese))
[10] 任恒, 朱永建, 王平, 等.巷道开挖效应下围岩损伤演化规律及试验研究[J]. 地下空间与工程学报, 2022, 18(5): 1615-1622. (Ren Heng, Zhu Yongjian, Wang Ping, et al. Damage evolution law and experimental study of surrounding rock under roadway excavation effect[J]. Chinese Journal of Underground Space and Engineering, 2022, 18(5): 1615-1622. (in Chinese))
[11] 包春燕, 姜谙男, 唐春安, 等.单轴加卸载扰动下石灰岩声发射特性研究[J]. 岩石力学与工程学报, 2011, 30(增2): 3871-3877. (Bao Chunyan, Jiang Annan, Tang Chun'an, et al. Study on acoustic emission characteristics of limestone under uniaxial loading and unloading disturbance[J]. chinese journal of rock mechanics and engineering, 2011, 30(Supp.2): 3871-3877. (in Chinese))
[12] 李元辉, 刘建坡, 赵兴东, 等.岩石破裂过程中的声发射b值及分形特征研究[J]. 岩土力学, 2009, 30(9): 2559-2563,2574. (Li Yuanhui, Liu Jianpo, Zhao Xingdong, et al. Study on b value and fractal characteristics of acoustic emission in rock fracture process[J]. Rock and Soil Mechanics, 2009, 30(9): 2559-2563,2574. (in Chinese))
[13] 张黎明, 马绍琼, 任明远, 等.不同围压下岩石破坏过程的声发射频率及b值特征[J]. 岩石力学与工程学报, 2015, 34(10): 2057-2063. (Zhang Liming, Ma Shaoqiong, Ren Mingyuan, et al. Acoustic emission frequency and b value characteristics of rock failure process under different confining pressures[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(10): 2057-2063. (in Chinese))
[14] Liu X L, Han M S, He W, et al. A new b-value estimation method in rock acoustic emission testing[J]. Journal of Geophysical Research-Solid Earth, 2020, 125(12): 1-14.
[15] Chen D L, Liu X L, He W, et al. Effect of attenuation on amplitude distribution and b value in rock acoustic emission tests[J]. Geophysical Journal International, 2022, 229(2): 933-947.
[16] Liu X L, Liu Z, Li X B, et al. Experimental study on the effect of strain rate on rock acoustic emission characteristics[J]. International Journal of Rock Mechanics and Mining Sciences, 2020, 133: 104420.
[17] 侯鹏, 高峰, 张志镇, 等.基于声发射和能量演化规律评价岩石脆性的方法[J]. 中国矿业大学学报, 2016, 45(4): 702-708. (Hou Peng, Gao Feng, Zhang Zhizhen, et al. A method for evaluating rock brittleness based on acoustic emission and energy evolution law[J]. Journal of China University of Mining and Technology, 2016, 45(4): 702-708. (in Chinese))
[18] 杨东辉, 赵毅鑫, 张村, 等.循环加载对沉积岩岩石Kaiser效应影响的试验研究[J]. 岩石力学与工程学报, 2018, 37(12): 2697-2708. (Yang Donghui, Zhao Yixin, Zhang Cun, et al. Experimental study on effect of cyclic loading on Kaiser effect of sedimentary rock [J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(12): 2697-2708. (in Chinese))
[19] 杨东辉, 赵毅鑫, 滕腾, 等.砂岩破裂失稳声发射临界特征与Kaiser点识别研究[J]. 应用基础与工程科学学报, 2021, 29(1): 218-230. (Yang Donghui, Zhao Yixin, Teng Teng, et al. Study on critical characteristics of acoustic emission and kaiser point identification of sandstone fracture instability[J]. Journal of Basic Science and Engineering, 2021, 29(1): 218-230. (in Chinese))
[20] Nejati H R, Ghazvinian A. Brittleness effect on rock fatigue damage evolution[J]. Rock Mechanics & Engineering, 2014, 47(5):1839-1848.
[21] Wang Y, Li C H, Hu Y Z, et al. A new method to evaluate the brittleness for brittle rock using crack initiation stress level from uniaxial stress-strain curves [J]. Environmental Earth Sciences, 2017, 76(23): 799-816.
[22] Yagiz S. Assessment of Brittleness using rock strength and density with punch penetration test [J]. Tunnelling and Underground Space Technology, 2009, 24(1): 66-74.
[23] Meng F Z, Zhou H, Zhang C Q, et al. Evaluation methodology of brittleness of rock based on post-peak stress-strain curves[J]. Mechanics & Engineering, 2015, 48(5): 1787-1805.
[24] Martini C D, Read R S, Martino J B. Observations of brittle failure around a circular test tunnel[J]. International Journal of Rock Mechanics and Mining Sciences, 1997, 34(7): 1065.
[25] 吴政, 张承娟. 单向荷载作用下岩石损伤模型及其力学特性研究 [J]. 岩石力学与工程学报, 1996, 15(1): 55-61. (Wu Zheng, Zhang Chengjuan. Study on rock damage model and its mechanical properties under uniaxial loading[J]. Chinese Journal of Rock Mechanics and Engineering, 1996, 15(1): 55-61. (in Chinese))
[26] 杨明辉, 赵明华, 曹文贵. 岩石损伤软化统计本构模型参数的确定方法[J]. 水利学报, 2005, 36(3): 345-349. (Yang Minghui, Zhao Minghua, Cao Wengui. Determination method of statistical constitutive model parameters of rock damage softening[J]. Journal of Hydraulic Engineering, 2005, 36(3): 345-349. (in Chinese))
[27] Gutenber B, Richter C F. Frequency of earthquakes frequency of earthquakes in california [J]. Bulletin of the Seismological Society of America 1944, 34(4): 185-188.
[28] 王小林, 温仕轩, 张亮, 等. 高温作用下砂岩声发射特征及破坏前兆[J]. 长江科学院院报,2023,40(11): 118-124. (Wang Xiaolin, Wen Shixuan, Zhang Liang, et al. Acoustic emission characteristics and failure precursor of sandstone in high temperature[J]. Journal of Yangtze river Scientific Research Institute, 2023,40(11): 118-124. (in Chinese))
[29] 刘希灵, 刘周, 李夕兵, 等.单轴压缩与劈裂荷载下灰岩声发射b值特性研究[J]. 岩土力学, 2019, 40(增1): 267-274. (Liu Xiling, Liu Zhou, Li Xibing, et al. Study on b-value characteristics of acoustic emission of limestone under uniaxial compression and splitting load[J]. Rock and Soil Mechanics, 2019, 40(Supp.1): 267-274. (in Chinese))
[30] 贺凯,李滨,朱赛楠,等.崩塌体失稳关键区岩石损伤特性试验研究[J].地下空间与工程学报,2018,14(6):1490-1497.(He Kai,Li Bin, Zhu Sainan,et al. Experimental study on rock damage characteristic of the key zone for collapsed rock mass[J].Chinese Journal of Underground Space and Engineering,2018,14(6):1490-1497.(in Chinese))
[31] 周辉, 孟凡震, 张传庆, 等.基于应力—应变曲线的岩石脆性特征定量评价方法[J]. 岩石力学与工程学报,2014, 33(6): 1114-1122. (Zhou Hui, Meng Fanzhen, Zhang Chuanqing, et al. Quantitative evaluation method of rock brittleness based on stress-strain curve [J]. Journal of Rock Mechanics and Engineering, 2014, 33(6): 1114-1122. (in Chinese))
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