胶结充填体损伤演化尺寸效应研究
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摘要
尺寸效应是影响胶结充填体抗压强度、变形破坏及损伤演化的一个重要因素。基于此,采用WAW–300微机电液伺服万能试验机、声发射和超声波监测系统,选取尺寸为50,70和100 mm的方形试样进行单轴压缩试验,通过分析声发射参数与超声波波速变化规律,探讨不同尺寸胶结充填体损伤演化规律。研究结果表明:(1)随着尺寸的增加,胶结充填体抗压强度表现出先增后减趋势,破坏形式由劈裂破坏为主向剪切破坏为主转化;(2)声发射参数与超声波波速变化规律表现出明显的阶段性与波动性特征:随尺寸的增加,声发射振铃累计计数曲线在平静期内趋于平缓,但在活跃期内上升幅度更高,超声波波速在平静期与活跃期内下降幅度均增加;(3)胶结充填体损伤演化过程中的耗散能量是影响其抗压强度的内在因素,峰后破坏过程中的损伤程度是影响其破坏形式的主要原因。研究成果可为不同尺寸胶结充填体破裂预测提供指导。
The size effect is an important factor affecting the uniaxial compressive strength,forms of deformation and damage evolution of cemented backfill. Based on this,using WAW–300 micro-electro-hydraulic servo universal testing machine,acoustic emission and ultrasonic monitoring system,three different sizes of square samples with side length of 50,70 and 100 mm were selected for uniaxial compression test. The variation rules of acoustic emission parameters and ultrasonic velocity were used to investigate the damage evolution law of cemented backfills with different sizes. The research results show that:(1) With the increase of size,the uniaxial compressive strength of cemented backfill shows a trend of increasing first and then decreasing,and the failure form changes from mainly splitting failure to shear failure.(2) The variation rules of acoustic emission parameters and ultrasonic velocity show obviously multistage and volatility:with the increase of size,the accumulative counting curve of acoustic emission ringing tends to be gentle during the quiet period,but the increase rate is higher during the active period;and the ultrasonic wave velocity increases during the quiet period and the active period.(3) The dissipated energy in the damage evolution of cemented backfill is the internal factor which affects its compressive strength,when the damage degree in the post-peak failure process is the main reason which affects its failure form.The research results can provide guidance for the prediction of fractures of different sizes of cemented backfill.
The size effect is an important factor affecting the uniaxial compressive strength,forms of deformation and damage evolution of cemented backfill. Based on this,using WAW–300 micro-electro-hydraulic servo universal testing machine,acoustic emission and ultrasonic monitoring system,three different sizes of square samples with side length of 50,70 and 100 mm were selected for uniaxial compression test. The variation rules of acoustic emission parameters and ultrasonic velocity were used to investigate the damage evolution law of cemented backfills with different sizes. The research results show that:(1) With the increase of size,the uniaxial compressive strength of cemented backfill shows a trend of increasing first and then decreasing,and the failure form changes from mainly splitting failure to shear failure.(2) The variation rules of acoustic emission parameters and ultrasonic velocity show obviously multistage and volatility:with the increase of size,the accumulative counting curve of acoustic emission ringing tends to be gentle during the quiet period,but the increase rate is higher during the active period;and the ultrasonic wave velocity increases during the quiet period and the active period.(3) The dissipated energy in the damage evolution of cemented backfill is the internal factor which affects its compressive strength,when the damage degree in the post-peak failure process is the main reason which affects its failure form.The research results can provide guidance for the prediction of fractures of different sizes of cemented backfill.
引文
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[6]叶光祥,解联库,郭利杰,等.不同形状尺寸充填试样强度研究[J].中国矿业,2015,24(10):128-131.(YE Guangxiang,XIE Lianku,GUO Lijie,et al.Study on the strength of packing specimens in different shape or size[J].China Mining Magazine,2015,24(10):128-131.(in Chinese))
[7]甘德清,韩亮,刘志义,等.胶结充填体抗压强度尺寸效应的试验研究[J].金属矿山,2018,(1):32-36.(GAN Deqing,HAN Liang,LIU Zhiyi,et al.Experimental study on the size effect of compressive strength of cemented filling body[J].Metal Mine,2018,(1):32-36.(in Chinese))
[8]彭志华.胶结充填体力学强度尺寸效应[J].中国矿业,2009,18(7):88-90.(PENG Zhihua.Size effect of compressive strength of cemented backfill[J].China Mining Magazine,2009,18(7):88-90.(in Chinese))
[9]徐淼斐,金爱兵,郭利杰,等.全尾砂胶结充填体试样强度的尺寸效应试验研究[J].中国矿业,2016,25(5):87-92.(XU Miaofei,JIN Aibing,GUO Lijie,et al.Sample size effect on strength of full tailings cemented backfill[J].China Mining Magazine,2016,25(5):87-92.(in Chinese))
[10]王志国,李柱营,顾乃满,等.充填体与围岩组合模型循环加卸载破裂声发射特征研究[J].金属矿山,2018,(8):51-57.(WANGZhiguo,LI Zhuying,GU Naiman,et al.Study on the acoustic emission and fracture characteristics of the backfill[J].Metal Mine,2018,(8):51-57.(in Chinese))
[11]张国凯,李海波,夏祥,等.单轴加载条件下花岗岩声发射及波传播特性研究[J].岩石力学与工程学报,2017,36(5):1 133-1 144.(ZHANG Guokai,LI Haibo,XIA Xiang,et al.Experiment study on acoustic emission and wave propagation in granite under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(5):1 133-1 144.(in Chinese))
[12]高祥,刘善军,黄建伟,等.应变率对岩石变形过程声发射特征的影响[J].岩石力学与工程学报,2018,37(4):887-897.(GAO Xiang,LIU Shanjun,HUANG Jianwei,et al.The influence of strain rate on AE characteristics during rock deformation[J].Chinese Journal of Rock Mechanics and Engineering,2018,37(4):887-897.(in Chinese))
[13]陈栋,王恩元,李楠,等.石膏和砂岩试样损伤破裂及声发射时空演化规律研究[J].煤炭学报,2018,43(7):1 902-1 909.(CHENDong,WANG Enyuan,LI Nan,et al.Study on the fracture and the law of temporal-spatial evolution of acoustic emission of gypsum and sandstone specimens[J].Journal of China Coal Socisty,2018,43(7):1 902-1 909.(in Chinese))
[14]邓代强,高永涛,吴顺川,等.基于声波测速的充填体完整性检测[J].北京科技大学学报,2010,32(10):1 248-1 252.(DENGDaiqiang,GAO Yongtao,WU Shunchuan,et al.Integrality detection of backfill based on acoustic wave velocity testing[J].Journal of University of Science and Technology Beijing,2010,32(10):1 248-1 252.(in Chinese))
[15]徐淼斐,高永涛,金爱兵,等.基于超声波波速及BP神经网络的胶结充填体强度预测[J].工程科学学报,2016,38(8):1 059-1 068.(XU Miaofei,GAO Yongtao,JIN Aibing,et al.Prediction of cemented backfill strength by ultrasonic pulse velocity and BP neural network[J].Chinese Journal of Engineering,2016,38(8):1 059-1 068.(in Chinese))
[16]杨治攀,胡鑫,周选林.超声波检测含裂隙岩石损伤特性试验研究[J].公路交通技术,2017,33(4):37-42.(YANG Zhipan,HU Xin,ZHOU Xuanlin,et al.Experimental study on damage characteristics of fractured rock with ultrasonic detection[J].Technology of Highway and Transport,2017,33(4):37-42.(in Chinese))
[17]徐晓炼,张茹,戴峰,等.煤岩特性对超声波速影响的试验研究[J].煤炭学报,2015,40(4):793-800.(XU Xiaolian,ZHANG Ru,DAI Feng,et al.Effect of coal and rock characteristics on ultrasonic velocity[J].Journal of China Coal Society,2015,40(4):793-800.(in Chinese))
[18]张晓君,龙坤,宋秀丽,等.岩爆的超声波监测及预测预报方法试验研究[J].采矿与安全工程学报,2016,33(3):515-520.(ZHANGXiaojun,LONG Kun,SONG Xiuli,et al.Experimental research on ultrasonic monitoring and forecast methods of rockburst[J].Journal of Mining and Safety Engineering,2016,33(3):515-520.(in Chinese))
[19]程爱平,张玉山,戴顺意,等.胶结充填体超声波波速损伤演化试验[J].金属矿山,2018,(9):41-46.(CHENG Aiping,ZHANG Yushan,DAI Shunyi,et al.Experimental study on damage evolution of cemented backfill based on ultrasonic wave velocity[J].Metal Mine,2018,(9):41-46.(in Chinese))
[20]杨永杰,王德超,郭明福,等.基于三轴压缩声发射试验的岩石损伤特征研究[J].岩石力学与工程学报,2014,33(1):98-104.(YANGYongjie,WANG Dechao,GUO Mingfu,et al.Study of rock damage characteristics based on acoustic emission tests under triaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(1):98-104.(in Chinese))
[2]GONZATTI C,ZORZI L,AGOSTINI I M,et al.In situ strength of coal bed based on the size effect study on the uniaxial compressive strength[J].International Journal of Mining Science and Technology,2014,24(6):747-754.
[3]梁昌玉,李晓,吴树仁,等.中低应变率加载条件下花岗岩尺寸效应的能量特征研究[J].岩土力学,2016,37(12):3 472-3 480.(LIANG Changyu,LI Xiao,WU Shuren,et al.Research on energy characteristics of size effect of granite under low/intermediate strain rates[J].Rock and Soil Mechanics,2016,37(12):3 472-3 480.(in Chinese))
[4]王青元,朱万成,刘洪磊,等.单轴压缩下绿砂岩长期强度的尺寸效应研究[J].岩土力学,2016,37(4):981-990.(WANG Qingyuan,ZHU Wangcheng,LIU Honglei,et al.Size effect of long-term strength of sandstone under uniaxial compression[J].Rock and Soil Mechanics,2016,37(4):981-990.(in Chinese))
[5]孟庆彬,韩立军,浦海,等.尺寸效应和应变速率对岩石力学特性影响的试验研究[J].中国矿业大学学报,2016,45(2):233-243.(MENG Qingbin,HAN Lijun,PU Hai,et al.Effect of the size and strain rate on the mechanical behavior of rock spicemens[J].Journal of China University of Mining and Technology,2016,45(2):233-243.(in Chinese))
[6]叶光祥,解联库,郭利杰,等.不同形状尺寸充填试样强度研究[J].中国矿业,2015,24(10):128-131.(YE Guangxiang,XIE Lianku,GUO Lijie,et al.Study on the strength of packing specimens in different shape or size[J].China Mining Magazine,2015,24(10):128-131.(in Chinese))
[7]甘德清,韩亮,刘志义,等.胶结充填体抗压强度尺寸效应的试验研究[J].金属矿山,2018,(1):32-36.(GAN Deqing,HAN Liang,LIU Zhiyi,et al.Experimental study on the size effect of compressive strength of cemented filling body[J].Metal Mine,2018,(1):32-36.(in Chinese))
[8]彭志华.胶结充填体力学强度尺寸效应[J].中国矿业,2009,18(7):88-90.(PENG Zhihua.Size effect of compressive strength of cemented backfill[J].China Mining Magazine,2009,18(7):88-90.(in Chinese))
[9]徐淼斐,金爱兵,郭利杰,等.全尾砂胶结充填体试样强度的尺寸效应试验研究[J].中国矿业,2016,25(5):87-92.(XU Miaofei,JIN Aibing,GUO Lijie,et al.Sample size effect on strength of full tailings cemented backfill[J].China Mining Magazine,2016,25(5):87-92.(in Chinese))
[10]王志国,李柱营,顾乃满,等.充填体与围岩组合模型循环加卸载破裂声发射特征研究[J].金属矿山,2018,(8):51-57.(WANGZhiguo,LI Zhuying,GU Naiman,et al.Study on the acoustic emission and fracture characteristics of the backfill[J].Metal Mine,2018,(8):51-57.(in Chinese))
[11]张国凯,李海波,夏祥,等.单轴加载条件下花岗岩声发射及波传播特性研究[J].岩石力学与工程学报,2017,36(5):1 133-1 144.(ZHANG Guokai,LI Haibo,XIA Xiang,et al.Experiment study on acoustic emission and wave propagation in granite under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(5):1 133-1 144.(in Chinese))
[12]高祥,刘善军,黄建伟,等.应变率对岩石变形过程声发射特征的影响[J].岩石力学与工程学报,2018,37(4):887-897.(GAO Xiang,LIU Shanjun,HUANG Jianwei,et al.The influence of strain rate on AE characteristics during rock deformation[J].Chinese Journal of Rock Mechanics and Engineering,2018,37(4):887-897.(in Chinese))
[13]陈栋,王恩元,李楠,等.石膏和砂岩试样损伤破裂及声发射时空演化规律研究[J].煤炭学报,2018,43(7):1 902-1 909.(CHENDong,WANG Enyuan,LI Nan,et al.Study on the fracture and the law of temporal-spatial evolution of acoustic emission of gypsum and sandstone specimens[J].Journal of China Coal Socisty,2018,43(7):1 902-1 909.(in Chinese))
[14]邓代强,高永涛,吴顺川,等.基于声波测速的充填体完整性检测[J].北京科技大学学报,2010,32(10):1 248-1 252.(DENGDaiqiang,GAO Yongtao,WU Shunchuan,et al.Integrality detection of backfill based on acoustic wave velocity testing[J].Journal of University of Science and Technology Beijing,2010,32(10):1 248-1 252.(in Chinese))
[15]徐淼斐,高永涛,金爱兵,等.基于超声波波速及BP神经网络的胶结充填体强度预测[J].工程科学学报,2016,38(8):1 059-1 068.(XU Miaofei,GAO Yongtao,JIN Aibing,et al.Prediction of cemented backfill strength by ultrasonic pulse velocity and BP neural network[J].Chinese Journal of Engineering,2016,38(8):1 059-1 068.(in Chinese))
[16]杨治攀,胡鑫,周选林.超声波检测含裂隙岩石损伤特性试验研究[J].公路交通技术,2017,33(4):37-42.(YANG Zhipan,HU Xin,ZHOU Xuanlin,et al.Experimental study on damage characteristics of fractured rock with ultrasonic detection[J].Technology of Highway and Transport,2017,33(4):37-42.(in Chinese))
[17]徐晓炼,张茹,戴峰,等.煤岩特性对超声波速影响的试验研究[J].煤炭学报,2015,40(4):793-800.(XU Xiaolian,ZHANG Ru,DAI Feng,et al.Effect of coal and rock characteristics on ultrasonic velocity[J].Journal of China Coal Society,2015,40(4):793-800.(in Chinese))
[18]张晓君,龙坤,宋秀丽,等.岩爆的超声波监测及预测预报方法试验研究[J].采矿与安全工程学报,2016,33(3):515-520.(ZHANGXiaojun,LONG Kun,SONG Xiuli,et al.Experimental research on ultrasonic monitoring and forecast methods of rockburst[J].Journal of Mining and Safety Engineering,2016,33(3):515-520.(in Chinese))
[19]程爱平,张玉山,戴顺意,等.胶结充填体超声波波速损伤演化试验[J].金属矿山,2018,(9):41-46.(CHENG Aiping,ZHANG Yushan,DAI Shunyi,et al.Experimental study on damage evolution of cemented backfill based on ultrasonic wave velocity[J].Metal Mine,2018,(9):41-46.(in Chinese))
[20]杨永杰,王德超,郭明福,等.基于三轴压缩声发射试验的岩石损伤特征研究[J].岩石力学与工程学报,2014,33(1):98-104.(YANGYongjie,WANG Dechao,GUO Mingfu,et al.Study of rock damage characteristics based on acoustic emission tests under triaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(1):98-104.(in Chinese))
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