卸荷条件下含瓦斯煤声发射临界慢化特征*

doi:10.16265/j.cnki.issn1003-3033.2021.09.018

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (9): 128-134.doi: 10.16265/j.cnki.issn1003-3033.2021.09.018

卸荷条件下含瓦斯煤声发射临界慢化特征^*

张冉¹, 刘杰¹ 副教授, 撒占友¹ 教授, 程健维² 副教授, 卢守青¹ 副教授, 王春源¹ 讲师

1 青岛理工大学安全科学与工程系,山东青岛 266520;
2 中国矿业大学安全工程学院,江苏徐州 221116

收稿日期:2021-06-05 修回日期:2020-08-02 出版日期:2021-09-28 发布日期:2022-03-28
作者简介:张冉 (1996—),男,山东诸城人,硕士研究生,研究方向为煤岩瓦斯动力灾害机理及控制。E-mail:zhangran715@126.com。
基金资助:
国家自然科学基金资助(51974169, 51574153, 51804176);中国博士后科学基金资助(2018M642632);山东省重点研发计划项目(2018GSF120012);山东省自然科学基金资助(ZR2018PEE001)。

Critical slowing down characteristics of acoustic emission of gas bearing coal under unloading conditions

ZHANG Ran¹, LIU Jie¹, SA Zhanyou¹, CHENG Jianwei², LU Shouqing¹, WANG Chunyuan¹

1 Department of Safety Science and Engineering, Qingdao University of Technology, Qingdao Shandong 266520, China;
2 School of Safety Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China

Received:2021-06-05 Revised:2020-08-02 Online:2021-09-28 Published:2022-03-28

摘要/Abstract

摘要： 为得到煤样在卸荷条件下失稳破坏的有效前兆信息,设计不同瓦斯压力下的固定轴压卸围压试验,得到煤样破裂过程的声发射(AE)结果,并计算得到不同瓦斯压力条件下AE时间序列的临界慢化特征,预警煤岩瓦斯动力灾害的发生。研究结果表明:卸荷条件下含瓦斯煤AE时间序列具有临界慢化特征,方差与自相关系数在煤样破坏前的突然增大可以作为表征试样破裂失稳的前兆信息;窗口长度与滞后步长会对临界慢化特征产生影响,相比之下,方差受窗口长度和滞后步长影响均较小,且前兆信息出现前曲线变化波动平稳。

关键词: 卸荷条件, 含瓦斯煤, 声发射(AE), 临界慢化特征, 前兆信息

Abstract: In order to obtain effective precursor information of instability failure of coal sample under unloading conditions, a fixed axial stress unloading confining stress experiment under different gas pressures was designed, and AE results of coal sample fracture process were obtained, and critical slowing down characteristics of AE time series under different gas pressures were calculated, so as to provide early warning of occurrence of coal and rock gas dynamic disasters. The results show that under unloading conditions, AE time series of gas-bearing coal has critical slowing characteristics. Sudden increase of variance and autocorrelation coefficient before coal sample failure can be used as precursor information to characterize failure of sample. Window length and lag step can affect critical slowing down characteristics. In contrast, variance is less affected by window length and lag step, and curve changes smoothly before precursor information appears.

Key words: unloading conditions, gas-bearing coal, acoustic emission (AE), critical slowing down characteristics, precursor information

中图分类号:

X936

张冉, 刘杰, 撒占友, 程健维, 卢守青, 王春源. 卸荷条件下含瓦斯煤声发射临界慢化特征^*[J]. 中国安全科学学报, 2021, 31(9): 128-134.

ZHANG Ran, LIU Jie, SA Zhanyou, CHENG Jianwei, LU Shouqing, WANG Chunyuan. Critical slowing down characteristics of acoustic emission of gas bearing coal under unloading conditions[J]. China Safety Science Journal, 2021, 31(9): 128-134.

参考文献

[1] LU Shouqing, ZHANG Yongliang, SA Zhanyou, et al. Evaluation of the effect of adsorbed gas and free gas on mechanical properties of coal[J]. Environmental Earth Sciences, 2019, 78:218.
[2] WEI Mingyao, LIU Jishan, ELSWORTH D, et al. Influence of gas adsorption induced non-uniform deformation on the evolution of coal permeability[J]. International Journal of Rock Mechanics & Mining Sciences, 2019, 114:71-78.
[3] LU Shouqing, ZHANG Yongliang, SA Zhanyou, et al. Damage-induced permeability model of coal and its application to gas predrainage in combination of soft coal and hard coal[J]. Energy Science & Engineering, 2019, 7(4):1 352-1 367.
[4] LOCKNER D A, BYERLEE J D, KUKSENKO V, et al. Quasi-static fault growth and shear fracture energy in granite[J]. Nature, 1991, 350(7):39-42.
[5] COX S J D,MEREDITH P G. Microcrack formation and material softening in rock measured by monitoring acoustic emissions[J]. International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts, 1993, 30: 11-24.
[6] HE Manchao, MIAO J L,FENG Jili. Rock burst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions[J]. International Journal of Rock Mechanics & Mining Sciences, 2010,47(2):286-298.
[7] 赵敖寒,马衍坤,刘健,等. 瓦斯环境中煤体破裂AE信号频带能量特征研究[J].中国安全科学学报,2020,30(3):115-121.
ZHAO Aohan, MA Yankun, LIU Jian, et al. Energy characteristics of AE signal frequency band during coal rupture in mines with gas[J]. China Safety Science Journal, 2020, 30(3):115-121.
[8] 马衍坤,王恩元,李忠辉,等. 煤体瓦斯吸附渗流过程及声发射特性实验研究[J].煤炭学报,2012,37(4):641-646.
MA Yankun, WANG Enyuan, LI Zhonghui, et al. Methane sorption and seepage in coal and characteristics of acoustic emission[J]. Journal of China Coal Society, 2012,37(4):641-646.
[9] 王云刚,邓万九,张宏图,等. 低围压煤样破裂过程次声波响应特征研究[J].中国安全科学学报,2020,30(2):14-20.
WANG Yungang, DENG Wanjiu, ZHANG Hongtu, et al. Infrasonic wave response characteristics of coal samples in fracture process under low confining pressure[J]. China Safety Science Journal, 2020, 30(2):14-20.
[10] 尹光志,秦虎,黄滚.不同应力路径下含瓦斯煤岩渗流特性与声发射特征实验研究[J].岩石力学与工程学报,2013,32 (7):1 315-1 320.
YIN Guangzhi, QIN Hu, HUANG Gun. Experimental study of characteristics of seepage and acoustic emission of gas-filled coal under different stress paths[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(7):1 315-1 320.
[11] 王雨虹,刘璐璐,付华,等. 基于声发射多参数时间序列的瓦斯突出预测[J].中国安全科学学报,2018,28(5):129-134.
WANG Yuhong, LIU Lulu, FU Hua, et al. Research on acoustic emission multi-parameter time series based prediction of gas outburst[J]. China Safety Science Journal, 2018, 28(5):129-134.
[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.
[13] KONG Xiangguo, WANG Enyuan, HU Shaobin, 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.
[14] 孔祥国,王恩元,胡少斌,等. 含瓦斯型煤破坏临界慢化前兆特征研究[J].中国矿业大学学报:自然科学版, 2017,46(1):1-7.
KONG Xiangguo, WANG Enyuan, HU Shaobin, et al. Research on precursory characteristics of critical slowing down before the failure of coal samples containing methane[J]. Journal of China University of Mining & Technology:Natural Science, 2017, 46(1):1-7.
[15] 张昕,李忠辉,钮月,等. 顶板岩石失稳破坏电位临界慢化特征实验研究[J].工矿自动化,2018,44(9):26-31.
ZHANG Xin, LI Zhonghui, NIU Yue, et al. Experimental study on electric potential critical slowing down characteristics before unstable failure of roof rocks[J]. Industry and Mine Automation, 2018, 44(9):26-31.
[16] 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.

卸荷条件下含瓦斯煤声发射临界慢化特征^*

Critical slowing down characteristics of acoustic emission of gas bearing coal under unloading conditions

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