含预制裂缝大理岩试样单轴压缩实验研究
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摘要
采用RMT-150B岩石力学伺服试验机对含预制裂缝的大理岩试样进行单轴压缩试验,分析了预制裂缝参数(裂缝倾角α=15°、30°、45°、60°、75°和裂缝位置l=25mm、 37.5mm、 50mm)对大理岩强度和破坏特性的影响。结果表明,应力-应变曲线随着预制裂缝倾角的增加,逐渐接近完整试样,受裂缝位置因素的影响相对较小;试样的峰值强度随预制裂缝倾角的增大,先小幅度增加,后发生减小,再剧烈增加,预制裂缝倾角很大程度地影响试样的破坏形式,并造成试样的强度差异;预制裂缝的扩展方向为偏离预制裂缝断面法线方向20°～90°范围;相比预制裂缝的位置因素,预制裂缝的倾角因素对岩石特性的影响更加显著。
In this paper, uniaxial compression experiment of marble specimens with prefabricated cracks was carried out by using RMT-150 B rock mechanics servo test machine. The effect of prefabricated crack parameters(crack inclination angle α=15°, 30°, 45°, 60°, 75° and crack position l=25 mm, 37.5 mm, 50 mm, respectively) on the strength and failure characteristics of marble were analyzed. Results show that with the increase of prefabricated crack inclination angle, the stress-strain curve gradually approaches the intact specimen, and is relatively less affected by the crack position factor. With the increase of prefabricated crack inclination angle, the peak strength of specimen increases by small amplitude first, then decreases, and finally increases sharply. The prefabricated crack inclination angle greatly affects the failure mode of specimen and causes the strength difference of specimen. The prefabricated crack affects the crack propagation direction, and the expansion direction is 20°～90° away from the normal direction of the prefabricated crack section. Compared with the positional factors of prefabricated cracks, the influence of the inclination factor of prefabricated cracks on rock properties is more significant.
In this paper, uniaxial compression experiment of marble specimens with prefabricated cracks was carried out by using RMT-150 B rock mechanics servo test machine. The effect of prefabricated crack parameters(crack inclination angle α=15°, 30°, 45°, 60°, 75° and crack position l=25 mm, 37.5 mm, 50 mm, respectively) on the strength and failure characteristics of marble were analyzed. Results show that with the increase of prefabricated crack inclination angle, the stress-strain curve gradually approaches the intact specimen, and is relatively less affected by the crack position factor. With the increase of prefabricated crack inclination angle, the peak strength of specimen increases by small amplitude first, then decreases, and finally increases sharply. The prefabricated crack inclination angle greatly affects the failure mode of specimen and causes the strength difference of specimen. The prefabricated crack affects the crack propagation direction, and the expansion direction is 20°～90° away from the normal direction of the prefabricated crack section. Compared with the positional factors of prefabricated cracks, the influence of the inclination factor of prefabricated cracks on rock properties is more significant.
引文
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[2] Nolen H.Optical detection of crack patterns in opening-mode fracture ofmarble[J].International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1987,24(4):135-144.
[3] Yang Shengqi.Crack coalescence behavior of brittle sandstone samples containing two coplanar fissures in the process of deformation failure[J].Engineering Fracture Mechanics,2011,78(17):3059-3081.
[4] 沙宁,宋彦琦,王晓,等.大理岩中的预制单裂纹扩展贯通试验研究[C].北京力学会第18届学术年会论文集:实验力学,2012:310-311 (SHA Ni,SONG Yanqi,WANG Xiao,et al.The single crack propagation in prefabricated marble through experimental study[C].Beijing Mechanical Eighteenth Annual Conference:Experimental Mechanics,2012:310-311 (in Chinese))
[5] 张梅英,袁建新,李廷芥,等.单轴压缩过程中岩石变形破坏机理[J].岩石力学与工程学报,1998,17(1):116-118 (ZHANG Meiying,YUAN Jianxin,LI Tingzai,et al.Mechanism of rock deformation and failure in uniaxial compression [J].Chinese Journal of Rock Mechanics and Engineering,1998,17(1):116-118 (in Chinese))
[6] 赵洪宝,胡桂林,李伟,等.预制裂隙岩石裂纹扩展规律的研究进展与思考[J].地下空间与工程学报,2016,12(2):899-906 (ZHAO Hongbao,HU Guilin,LI Wei,et al.Research progress and thinking on the crack propagation law of pre-fractured rock[J].Chinese Journal of Underground Space and Engineering,2016,12(2):899-906 (in Chinese))
[7] 将明镜,陈贺,张宁,等.含双裂隙岩石裂纹演化机理的离散元数值分析[J].岩土力学学报,2014,35(11):3259-3288 (JIANG Mingjing,CHEN He,ZHANG Ning,et al.Distinct element numerical analysis of crack evolution in rocks containing pre-existing double flaw[J].Rock and Soil Mechanics,2014,35(11):3259-3288 (in Chinese))
[8] 赵程,李丰铭,田加深,等.基于单轴压缩试验的岩石单裂纹扩展及损伤演化规律研究[J].岩石力学与工程学报,2016,35(2):3626-3632 (ZHAO Cheng,LI Feng Ming,TIAN Jiashen,et al.Study on single crack propagation and damage evolution mechanism of rock-like materials under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(2):3626-3632 (in Chinese))
[9] 赵程,田加深,松田浩,等.单轴压缩下基于全局应变场分析的岩石裂纹扩展及其损伤演化特性研究[J].岩石力学与工程学报,2015,34(4):763-769 (ZHAO Cheng,TIAN Jiashen,SONG Tianhao,et al.Crack propagation and damage of rock under uniaxial compression based on global strain field analysis[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(4):763-769 (in Chinese))
[10] 赵程,鲍冲,田加深,等.基于应变局部化的双裂纹岩样贯通模式及强度试验研究[J].岩石力学与工程学报,2015,34(11):2309-2318 (ZHAO Cheng,BAO Chong,TIAN Jiashen,et al.Experimental study of coalescence mode of cracks and strength of rock with double flaws based on strain localization[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2309-2318 (in Chinese))
[11] 肖桃李,何祥锋,汪振华,等.单轴压缩下单裂隙类岩石强度变形特性分析[J].长江大学学报(自然版),2018,15(1):64-67 (XIAO Taoli,HE Xiangfeng,WANG Zhenhua,et al.Analysis of the strength and deformation characteristics of single fissure rock under uniaxial compression[J].Journal of Yangtze University (Natural Edition),2018,15(1):64-67 (in Chinese))
[12] 李地元,肖鹏,谢涛,等.动静态压缩下岩石试样的长径比效应研究[J].实验力学,2018,33(1):93-100 (LI Diyuan,XIAO Peng,XIE Tao,et al.On the effect of length to diameter ratio of rock specimen subjected to dynamic and static compression[J].Journal of Experimental Mechanics,2018,33(1):93-100 (in Chinese))
[13] 赵元汉,苗雨,李银平.预制裂纹岩石压剪试验的数值模拟分析[J].岩石力学与工程学报,2004,17(1):3113-3116 (WANG Yuanhan,MIAO Yu,LI Yinping.Numerical simulation analysis of the experiment on rock with preexcisted cracks under compression and shearing [J].Chinese Journal of Rock Mechanics and Engineering,2004,17(1):3113-3116 (in Chinese))
[14] 将曼.裂纹位置对混凝土动态破坏的影响[D].河北:燕山大学,2014 (JIANG Men.The influence of mann crack location on dynamic failure of concrete[D].Hebei:Yanshan University,2014 (in Chinese))
[15] 李银屏,王元汉,陈龙珠,等.含预制裂纹大理岩的压剪试验分析[J].岩土工程学报,2004,26(1):120-124 (LI Yinping,WANG Yuanhan,CHEN Longzhu,et al.Experimental research on pre-existing cracks in marble under compression[J].Chinese Journal of Geotechnical Engineering,2004,26(1):120-124 (in Chinese))
[16] 蒲成志,曹平,衣永亮.单轴压缩下预制2条贯通裂隙类岩材料断裂行为[J].中南大学学报(自然科学版),2012,43(7):2708-2716 (PU Chengzhi,CAO Ping,YI Yongliang.Fracture for rock-like materials with two transfixion fissures under uniaxial compression[J].Journal of Central South University (Science and Technology),2012,43(7):2708-2716 (in Chinese))
[17] 郭少华,周少青,邹春伟.压缩载荷作用下岩石类材料的断裂模式研究[J].实验力学,2008,23(2):149-156 (GUO Shaohua,ZHOU Shaoqing,ZOU Chunwei.Research on fracture mode of rock-type materixls under compressive loading[J].Journal of Experimental Mechanics,2008,23(2):149-156 (in Chinese))
[18] 靳瑾,曹平,蒲成志.预制裂隙几何参数对类岩石材料破坏模式及强度的影响[J].中南大学学报(自然科学版),2012,43(7):529-535 (JIN Jin,CAO Ping,PU Chengzhi.Influence of flaw parameters on damage mode and strength of rock-like materials[J].Journal of Central South University (Science and Technology),2012,43(7):529-535 (in Chinese))
[19] Robet A,Einstein H H.Fracture coalescence in rock-type material under uniaxial and biaxial compression[J].International Journal of Rock Mechanics and Mining Sciences,1998,35(7):863-888.
[20] 李银屏,伍佑伦,杨春和.岩石类材料滑动裂纹模型[J].岩石力学与工程学报,2007,26 (2):278-284 (LI Yinping,WU Youlun,YANG Chunhe.Comparison of sliding crack models for rock-like materials[J].Chinese Journal of Rock Mechanics and Engineering,2008,26(2):278-284 (in Chinese))
[21] 李先炜,兰勇瑞,邹俊兴.岩石断口分析[J].中国矿业学院学报,1983,1:15-21 (LI Xianwei,LAN Yongrui,ZOU Junxing.A study rock fracture[J].Journal of China University of Mining and Technology,1983,1:15-21 (in Chinese))
[22] 郭静芸.岩石拉伸剪切变形破坏特征与破坏准则[D].北京:中国科学院大学,2013 (GUO Jingyun.Characteristics and failure criterion of tensile deformation and failure of rock[D].Beijing:University of Chinese Academy of Sciences,2013 (in Chinese))
[23] 王来贵,习彦会,高航,等.花岗岩单轴压缩侧向变形及脆性破坏机制实验研究[J].实验力学,2015,30(5):669-675 (WANG Laigui,XI Yanhui,GAO Hang,et al.Experimental study of granite brittle fracture mechanism in lateral deformation due to uniaxial compression[J].Journal of Experimental Mechanics,2015,30(5):669-675 (in Chinese))
[24] 刘小明,李焯芬.岩石断口微观断裂机制分析与试验研究[J].岩石力学与工程学报,1997,16(6):509-513(LIU Xiaoming,LI Zhuofen.Microfailure mechanism analysis and test study for rock failure surface[J].Journal of China University of Mining and Technology,1997,16(6):509-513 (in Chinese))
[25] 谢和平,陈至达.岩石断裂的微观机理分析[J].煤炭学报,1989,2:57-67 (XIE Heping,CHEN Zida.Analysis of rock fracture micro-mechanism [J].Journal of China Coal Society,1989,2:57-67 (in Chinese))
[2] Nolen H.Optical detection of crack patterns in opening-mode fracture ofmarble[J].International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1987,24(4):135-144.
[3] Yang Shengqi.Crack coalescence behavior of brittle sandstone samples containing two coplanar fissures in the process of deformation failure[J].Engineering Fracture Mechanics,2011,78(17):3059-3081.
[4] 沙宁,宋彦琦,王晓,等.大理岩中的预制单裂纹扩展贯通试验研究[C].北京力学会第18届学术年会论文集:实验力学,2012:310-311 (SHA Ni,SONG Yanqi,WANG Xiao,et al.The single crack propagation in prefabricated marble through experimental study[C].Beijing Mechanical Eighteenth Annual Conference:Experimental Mechanics,2012:310-311 (in Chinese))
[5] 张梅英,袁建新,李廷芥,等.单轴压缩过程中岩石变形破坏机理[J].岩石力学与工程学报,1998,17(1):116-118 (ZHANG Meiying,YUAN Jianxin,LI Tingzai,et al.Mechanism of rock deformation and failure in uniaxial compression [J].Chinese Journal of Rock Mechanics and Engineering,1998,17(1):116-118 (in Chinese))
[6] 赵洪宝,胡桂林,李伟,等.预制裂隙岩石裂纹扩展规律的研究进展与思考[J].地下空间与工程学报,2016,12(2):899-906 (ZHAO Hongbao,HU Guilin,LI Wei,et al.Research progress and thinking on the crack propagation law of pre-fractured rock[J].Chinese Journal of Underground Space and Engineering,2016,12(2):899-906 (in Chinese))
[7] 将明镜,陈贺,张宁,等.含双裂隙岩石裂纹演化机理的离散元数值分析[J].岩土力学学报,2014,35(11):3259-3288 (JIANG Mingjing,CHEN He,ZHANG Ning,et al.Distinct element numerical analysis of crack evolution in rocks containing pre-existing double flaw[J].Rock and Soil Mechanics,2014,35(11):3259-3288 (in Chinese))
[8] 赵程,李丰铭,田加深,等.基于单轴压缩试验的岩石单裂纹扩展及损伤演化规律研究[J].岩石力学与工程学报,2016,35(2):3626-3632 (ZHAO Cheng,LI Feng Ming,TIAN Jiashen,et al.Study on single crack propagation and damage evolution mechanism of rock-like materials under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(2):3626-3632 (in Chinese))
[9] 赵程,田加深,松田浩,等.单轴压缩下基于全局应变场分析的岩石裂纹扩展及其损伤演化特性研究[J].岩石力学与工程学报,2015,34(4):763-769 (ZHAO Cheng,TIAN Jiashen,SONG Tianhao,et al.Crack propagation and damage of rock under uniaxial compression based on global strain field analysis[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(4):763-769 (in Chinese))
[10] 赵程,鲍冲,田加深,等.基于应变局部化的双裂纹岩样贯通模式及强度试验研究[J].岩石力学与工程学报,2015,34(11):2309-2318 (ZHAO Cheng,BAO Chong,TIAN Jiashen,et al.Experimental study of coalescence mode of cracks and strength of rock with double flaws based on strain localization[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2309-2318 (in Chinese))
[11] 肖桃李,何祥锋,汪振华,等.单轴压缩下单裂隙类岩石强度变形特性分析[J].长江大学学报(自然版),2018,15(1):64-67 (XIAO Taoli,HE Xiangfeng,WANG Zhenhua,et al.Analysis of the strength and deformation characteristics of single fissure rock under uniaxial compression[J].Journal of Yangtze University (Natural Edition),2018,15(1):64-67 (in Chinese))
[12] 李地元,肖鹏,谢涛,等.动静态压缩下岩石试样的长径比效应研究[J].实验力学,2018,33(1):93-100 (LI Diyuan,XIAO Peng,XIE Tao,et al.On the effect of length to diameter ratio of rock specimen subjected to dynamic and static compression[J].Journal of Experimental Mechanics,2018,33(1):93-100 (in Chinese))
[13] 赵元汉,苗雨,李银平.预制裂纹岩石压剪试验的数值模拟分析[J].岩石力学与工程学报,2004,17(1):3113-3116 (WANG Yuanhan,MIAO Yu,LI Yinping.Numerical simulation analysis of the experiment on rock with preexcisted cracks under compression and shearing [J].Chinese Journal of Rock Mechanics and Engineering,2004,17(1):3113-3116 (in Chinese))
[14] 将曼.裂纹位置对混凝土动态破坏的影响[D].河北:燕山大学,2014 (JIANG Men.The influence of mann crack location on dynamic failure of concrete[D].Hebei:Yanshan University,2014 (in Chinese))
[15] 李银屏,王元汉,陈龙珠,等.含预制裂纹大理岩的压剪试验分析[J].岩土工程学报,2004,26(1):120-124 (LI Yinping,WANG Yuanhan,CHEN Longzhu,et al.Experimental research on pre-existing cracks in marble under compression[J].Chinese Journal of Geotechnical Engineering,2004,26(1):120-124 (in Chinese))
[16] 蒲成志,曹平,衣永亮.单轴压缩下预制2条贯通裂隙类岩材料断裂行为[J].中南大学学报(自然科学版),2012,43(7):2708-2716 (PU Chengzhi,CAO Ping,YI Yongliang.Fracture for rock-like materials with two transfixion fissures under uniaxial compression[J].Journal of Central South University (Science and Technology),2012,43(7):2708-2716 (in Chinese))
[17] 郭少华,周少青,邹春伟.压缩载荷作用下岩石类材料的断裂模式研究[J].实验力学,2008,23(2):149-156 (GUO Shaohua,ZHOU Shaoqing,ZOU Chunwei.Research on fracture mode of rock-type materixls under compressive loading[J].Journal of Experimental Mechanics,2008,23(2):149-156 (in Chinese))
[18] 靳瑾,曹平,蒲成志.预制裂隙几何参数对类岩石材料破坏模式及强度的影响[J].中南大学学报(自然科学版),2012,43(7):529-535 (JIN Jin,CAO Ping,PU Chengzhi.Influence of flaw parameters on damage mode and strength of rock-like materials[J].Journal of Central South University (Science and Technology),2012,43(7):529-535 (in Chinese))
[19] Robet A,Einstein H H.Fracture coalescence in rock-type material under uniaxial and biaxial compression[J].International Journal of Rock Mechanics and Mining Sciences,1998,35(7):863-888.
[20] 李银屏,伍佑伦,杨春和.岩石类材料滑动裂纹模型[J].岩石力学与工程学报,2007,26 (2):278-284 (LI Yinping,WU Youlun,YANG Chunhe.Comparison of sliding crack models for rock-like materials[J].Chinese Journal of Rock Mechanics and Engineering,2008,26(2):278-284 (in Chinese))
[21] 李先炜,兰勇瑞,邹俊兴.岩石断口分析[J].中国矿业学院学报,1983,1:15-21 (LI Xianwei,LAN Yongrui,ZOU Junxing.A study rock fracture[J].Journal of China University of Mining and Technology,1983,1:15-21 (in Chinese))
[22] 郭静芸.岩石拉伸剪切变形破坏特征与破坏准则[D].北京:中国科学院大学,2013 (GUO Jingyun.Characteristics and failure criterion of tensile deformation and failure of rock[D].Beijing:University of Chinese Academy of Sciences,2013 (in Chinese))
[23] 王来贵,习彦会,高航,等.花岗岩单轴压缩侧向变形及脆性破坏机制实验研究[J].实验力学,2015,30(5):669-675 (WANG Laigui,XI Yanhui,GAO Hang,et al.Experimental study of granite brittle fracture mechanism in lateral deformation due to uniaxial compression[J].Journal of Experimental Mechanics,2015,30(5):669-675 (in Chinese))
[24] 刘小明,李焯芬.岩石断口微观断裂机制分析与试验研究[J].岩石力学与工程学报,1997,16(6):509-513(LIU Xiaoming,LI Zhuofen.Microfailure mechanism analysis and test study for rock failure surface[J].Journal of China University of Mining and Technology,1997,16(6):509-513 (in Chinese))
[25] 谢和平,陈至达.岩石断裂的微观机理分析[J].煤炭学报,1989,2:57-67 (XIE Heping,CHEN Zida.Analysis of rock fracture micro-mechanism [J].Journal of China Coal Society,1989,2:57-67 (in Chinese))