XIAO Xiaochun，LIU Haiyan，DING Xin，et al. Mechanical properties and acoustic emission evolution of coal-rock combination under unidirectional unloading condition[J]. Coal Science and Technology，2023，51（11）：71−83
. DOI: 10.13199/j.cnki.cst.2022-2040| Citation: |
XIAO Xiaochun，LIU Haiyan，DING Xin，et al. Mechanical properties and acoustic emission evolution of coal-rock combination under unidirectional unloading condition[J]. Coal Science and Technology，2023，51（11）：71−83 . DOI: 10.13199/j.cnki.cst.2022-2040
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For the rock burst disaster problems caused by unloading disturbance of deep roadway excavation, the study on the deformation and fracture mechanism of roadway surrounding rock under different unloading conditions was carried out. Taking the coal-rock combination as the object of research, the true triaxial testing machine for rock mechanics and acoustic emission monitoring system was used to carry out the unidirectional unloading test of constant axial pressure and unloading lateral pressure, explore the mechanical properties of coal-rock combination under the influence of unloading initial confining pressure and unloading rate, invert the propagation laws of different types cracks in the coal-rock combination through the acoustic emission signal characteristics, and quantify the damage of coal-rock combination during loading and unloading with the ringing count. The results showed that coal-rock combination had obvious failure characteristics of tensile and shear composite under the condition of unidirectional unloading, macroscopically the coal was dominated by shear failure and the rock was dominated by tensile failure; the increase of the unloading initial confining pressure led to aggravating the failure of coal-rock combination, and the increase of unloading rate promoted the expansion of tensile cracks along the stress unloading direction of rock samples; the change of RA–AF of acoustic emission parameter accurately described the proportion of different types cracks in the coal-rock combination, coal-rock combination mostly expanded in the form of shear cracks during the loading and unloading process, the proportion of shear cracks decreased with the increase of the unloading initial lateral stress, and the increase of unloading rate promoted the increase of the proportion of tensile cracks in the stress unloading stage, the proportion of shear cracks decreased; it was found that unloading initial lateral stress and unloading rate were the main factors affecting the damage development of coal-rock combination in unloading stage through studying the damage calibrated by acoustic emission ringing count during the loading stage; after unloading initial lateral stress exceeded 20 MPa, it basically had no effect on the damage of coal-rock combination in unloading stage. The research results could provide reference for the occurrence mechanism and disaster prevention of rock burst in deep roadway excavation.
| [1] |
朱明政. 卸荷条件下煤岩变形破坏机理研究[D]. 徐州: 中国矿业大学, 2019.
ZHU Mingzheng. Study on deformation and failure mechanism of coal and rock under unloading conditions[D]. Xuzhou: China university of mining and technology, 2019.
|
| [2] |
姜耀东,潘一山,姜福兴,等. 我国煤炭开采中的冲击地压机理和防治[J]. 煤炭学报,2014,39(2):205−213.
JIANG Yaodong,PAN Yishan,JIANG Fuxing,et al. State of the art review on mechanism and prevention of coal bumps in China[J]. Journal of China Coal Society,2014,39(2):205−213.
|
| [3] |
谢和平,高 峰,鞠 杨. 深部岩体力学研究与探索[J]. 岩石力学与工程学报,2015,34(11):2161−2178.
XIE Hepin,GAO Feng,JU Yang. Deep rock mechanics research and exploration[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2161−2178.
|
| [4] |
左建平,陈 岩,张俊文,等. 不同围压作用下煤–岩组合体破坏行为及强度特征[J]. 煤炭学报,2016,41(11):2706−2713.
ZUO Jianping,CHEN Yan,ZHANG Junwen,et al. Failure behavior and strength characteristics of coal−rock combined body under different confining pressures[J]. Journal of China Coal Society,2016,41(11):2706−2713.
|
| [5] |
沈文兵,余伟健,潘 豹. 不同倾角煤岩组合岩石力学试验及破坏特征[J]. 矿业工程研究,2021,36(1):1−8.
SHEN Wenbing,YU Weijian1,PAN Bao. Rock mechanics test and failure characteristics of coal-rock combination with different dip angles[J]. Mineral Engineering Research,2021,36(1):1−8.
|
| [6] |
左建平,宋洪强. 煤岩组合体的能量演化规律及差能失稳模型[J]. 煤炭学报,2022,47(8):3037−3051.
ZUO Jianping,SONG Hongqiang. Energy evolution law and differential energy instability model of coal-rock combined body[J]. Journal of China Coal Society,2022,47(8):3037−3051.
|
| [7] |
YIN Dawei,CHEN Shaojie,GE Yao,et al. Mechanical properties of rock–coal bi-material samples with different lithologies under uniaxial loading[J]. Journal of Materials Research and Technology,2021,10:322−338.
|
| [8] |
GONG F Q,Yeh,LUO Y. The effect of high loading rate on the behavior and mechanical properties of coal-rock combined body[J]. Shock and Vibration,2018,2018(6):1−9.
|
| [9] |
樊玉峰, 肖晓春, 丁 鑫, 等. 岩煤接触面力学性质对组合煤岩力学行为影响机制[J]. 煤炭学报, 2023, 48(4): 1487−1501.
FAN Yufeng, XIAO Xiaochun, DING Xin, et al. Influence mechanism of contact surface mechanical properties on mechanical behavior of coal rock combination[J]. Journal of China Coal Society, 2023, 48(4): 1487−1501.
|
| [10] |
樊玉峰,肖晓春,徐 军,等. 煤高度对组合岩煤力学性质及冲击倾向性的影响[J]. 煤炭学报,2020,45(S2):649−659.
FAN Yufeng,XIAO Xiaochun,XU Jun,et al. Mechanical properties of coal rock combinations and evaluation of impact tendency considering effects of the height portion of coal[J]. Journal of China Coal Society,2020,45(S2):649−659.
|
| [11] |
张晨阳,潘俊锋,夏永学,等. 真三轴加卸载条件下组合煤岩冲击破坏特征研究[J]. 岩石力学与工程学报,2020,39(8):1522−1533.
ZHANG Chenyang,PAN Junfeng,XIA Yongxue,et al. Research on impact failure characteristics of coal-rock combination bodies under true triaxial loading and unloading conditions[J]. Chinese Journal of Rock Mechanics and Engineering,2020,39(8):1522−1533.
|
| [12] |
荣浩宇,李桂臣,赵光明,等. 不同应力路径下深部岩石真三轴卸荷特性试验[J]. 煤炭学报,2020,45(9):3140−3149.
RONG Haoyu,LI Guichen,ZHAO Guangming,et al. True triaxial test study on mechanical properties of deep rock mass in different stress paths[J]. Journal of China Coal Society,2020,45(9):3140−3149.
|
| [13] |
张俊文,范文兵,宋治祥,等. 真三轴不同应力路径下深部砂岩力学特性[J]. 中国矿业大学学报,2021,50(1):106−114.
ZHANG Junwen,FAN Wenbing,SONG Zhixiang,et al. Mechanical characteristics of deep sandstone under different true triaxial stress paths[J]. Journal of China University of Mining & Technology,2021,50(1):106−114.
|
| [14] |
李泓颖,刘晓辉,郑 钰,等. 深埋锦屏大理岩渐进破坏过程中的特征能量分析[J]. 岩石力学与工程学报,2022(S2):3229−3239.
LI Hongying,LIU Xiaohui,ZHENG Yu,et al. Analysis of characteristic energy during the progressive failure of deep-buried marble in Jinping[J]. Chinese Journal of Rock Mechanics and Engineering,2022(S2):3229−3239.
|
| [15] |
HUANG D,LI Y R. Conversion of strain energy in triaxial unloading tests on marble[J]. International Journal of Rock Mechanics and Mining Sciences,2014,66:160−168. doi: 10.1016/j.ijrmms.2013.12.001
|
| [16] |
WANG H T,HE M M,PANG F,et al. Energy dissipation-based method for brittleness evolution and yield strength determination of rock[J]. Journal of Petroleum Science and Engineering,2021,200:108376.
|
| [17] |
刘永茜,韩国锋,王维华,等. 不同卸载速率下受载煤体裂隙结构演化机制[J]. 煤炭学报,2020,45(11):3806−3816.
LIU Yongqia,HAN Guofeng,WANG Weihua,et al. Evolution mechanism of fracture structure of loaded coal under different unloading rates[J]. Journal of China Coal Society,2020,45(11):3806−3816.
|
| [18] |
郭红军,季 明,曹 力. 卸荷速率对粉砂岩力学特性的影响[J]. 西安建筑科技大学学报(自然科学版),2020,52(6):860−868.
GUO Hongjun,JI Ming,GAO Li. Effect of unloading rate on the mechanical properties of siltstone[J]. Journal of Xi'an University of Architecture & Technology(Natural Science Edition),2020,52(6):860−868.
|
| [19] |
尹光志,马 波,刘 超,等. 真三轴应力条件下加卸荷速率对砂岩力学特性与能量特征的影响[J]. 煤炭学报,2019,44(2):454−462.
YIN Guangzhi,MA Bo,LIU Chao,et al. Effect of loading and unloading rates on mechanical properties and energy characteristics of sandstone under true triaxial stress[J]. Journal of China Coal Society,2019,44(2):454−462.
|
| [20] |
张 尧,李波波,许 江,等. 基于能量耗散的煤岩三轴受压损伤演化特征研究[J]. 岩石力学与工程学报,2021,40(8):1614−1627.
ZHANG Yao,LI Bobo,XU Jiang,GAO Zheng,et al. Study on triaxial compression damage evolution characteristics of coal-based on energy dissipation[J]. Chinese Journal of Rock Mechanics and Engineering,2021,40(8):1614−1627.
|
| [21] |
丁 鑫,肖晓春,吴 迪,等. 考虑初始孔隙性的含瓦斯煤岩力学本构关系与损伤演化研究[J]. 材料导报,2021,35(18):18096−18103.
DING Xin,XIAO Xiaochun,WU Di,et al. Study on mechanical constitutive relationship and damage evolution of gas-bearing coal based on initial pore- cracks[J]. Materials Reports,2021,35(18):18096−18103.
|
| [22] |
孙 雪,李二兵,段建立,等. 北山花岗岩三轴压缩下声发射特征及损伤演化规律研究[J]. 岩石力学与工程学报,2021,35(18):18096−18103.
SUN Xue,LI Erbing,DUAN Jianli,et al. Study on acoustic emission characteristics and damage evolution law of Beishan granite under triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering,2021,35(18):18096−18103.
|
| [23] |
余 洁. 深部大理岩力学特性及声发射特征研究[D]. 成都: 西华大学, 2021.
YU Jie. Research on mechanical properties and acoustic emission characteristics of deep marbles[D]. Chengdu: Xihua University, 2021.
|
| [24] |
郭红军. 实体煤巷道掘进围岩卸荷能量演化规律与冲击机理研究[D]. 徐州: 中国矿业大学, 2019.
GUO Hongjun. Research on the energy evolution laws of surrounding rock unloading and the rockburst mechanism in solid coal roadway excavation[D]. Xuzhou: China University of Mining and Technology, 2019.
|
| [25] |
陈光波,李 谭,杨 磊,等. 不同煤岩比例及组合方式的组合体力学特性及破坏机制[J]. 采矿与岩层控制工程学报,2021,3(2):023522.
CHEN Guangbo,LI Tan,YANG Lei,et al. Mechanical properties and failure mechanism of combined bodies with different coal-rock ratios and combinations[J]. Journal of Mining and Strata Control Engineering,2021,3(2):023522.
|
| [26] |
陆菜平. 组合煤岩的强度弱化减冲原理及其应用[D]. 徐州: 中国矿业大学, 2008.
LU Laiping. Intensity weakening theory for rockburst of compound coal-rock and its application[D]. Xuzhou: China University of Mining and Technology, 2008.
|
| [27] |
朱子涵,蔚立元,李景龙,等. 峰前卸荷大理岩变形演化规律及破坏耗能特征[J]. 煤炭学报,2020,45(S1):181−190.
ZHU Zihan,YU Liyuan,LI Jinglong,et al. Deformation evolution and dissipated energy characteristics of marble under pre-peak unloading conditions[J]. Journal of China Coal Society,2020,45(S1):181−190.
|
| [28] |
沈 威. 煤层巷道掘进围岩应力路径转换及其冲击机理研究[D]. 徐州: 中国矿业大学, 2018.
SHEN Wei. Study on stress path variation of surrounding rock and mechanism of rockburst in coal roadway excavation[D]. Xuzhou: China University of Mining and Technology, 2018.
|
| [29] |
荣浩宇. 不同应力路径下深部岩石卸荷力学特性真三轴试验研究[D]. 淮南: 安徽理工大学, 2018.
RONG Haoyu. True triaxial test study on mechanical properties of deep rock mass in different stress paths[D]. Huainan: Anhui University of Science and Technology, 2018.
|
| [30] |
刘子硕,韩立军,朱合轩. 真三轴状态下煤岩单体的强度变形特性及破坏模式研究[J]. 金属矿山,2022(5):95−102.
LIU Zishuo,HAN Lijun,ZHU Hexuan. Study on strength, deformation and failure mode of coal-rock single body under true triaxial compression condition[J]. Metal Mine,2022(5):95−102.
|
| [31] |
TSANGOURI E,AGGELIS D G,MATIKAS T E. Acoustic emission activity for characterizing fracture of marble under bending[J]. Applied Sciences,2015,6(1):6. doi: 10.3390/app6010006
|
| [32] |
OHTSU M, OKAMOTO T, YUYAMA S. Moment tensor analysis of acoustic emission for cracking mechanisms in concrete[J]. Aci Struct J, 1998, 95: 87–95.
|
| [33] |
AGGELIS D G,KORDATOS E Z,MATIKAS T E. Acoustic emission for fatigue damage characterization in metal plates[J]. Mechanics Research Communications,2011,38(2):106−110. doi: 10.1016/j.mechrescom.2011.01.011
|
| [34] |
JIA Zheqiang,XIE Heping,ZHANG Ru,et al. Acoustic emission characteristics and damage evolution of coal at different depths under triaxial compression[J]. Rock Mech Rock Eng,2020,53:1−14.
|
| [35] |
李兆霖. 真三轴条件下岩石加卸载力学特性及破坏机理研究[D]. 徐州: 中国矿业大学, 2019.
LI Zhaolin. Study on mechanical properties and failure mechanism of rock under true triaxial loading and unloading conditions[D]. Xuzhou: China University of Mining and Technology, 2019.
|
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