爆炸动载荷下裂纹扩展规律的实验研究

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摘要为研究在爆炸动载荷作用下岩石内裂纹的起裂及扩展规律，应用PMMA材料制作带裂纹平板试样，在距离裂纹尖端60 mm的圆周上设置与裂纹成不同角度的炮孔，然后引爆雷管来实验研究裂纹的动态起裂及其扩展规律，系统地研究爆炸应力波入射角对裂纹起裂角和扩展角的影响规律。实验结果表明，入射角为0°时，起裂角为0°，即裂纹沿原裂纹面扩展；当入射角大于15°而小于75°时，在裂纹的两端会产生翼型裂纹，其翼型裂纹的起裂角及扩展长度都与入射角有关；当入射角大于75°时，新生裂纹很小。

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关键词 ：岩石力学, 爆炸应力波, 入射角, 起裂角, 裂纹扩展

Abstract：In order to investigate the regularity of crack propagation under blasting dynamic loads，polymethyl methacrylate(PMMA) plates are employed to make samples containing a single crack and a borehole. The borehole is designed along the quadrant of a circle centered at one crack tip with radius of 60 mm. A detonator inside the borehole is fired to produce dynamic stress waves. The effects of incident angles of stress waves on crack initiation angles and propagation angles have been studied experimentally. The results show that：(1) As incident angle is 0°，crack initiation angle is 0°，i.e. the cracks propagate along the crack surface plane；(2) As incident angle is greater than 15° and less than 75°，wing-cracks occur along the pre-existing crack tips；(3) The wing-crack property is related to the incident angle of stress waves；(4) As incident angle is greater than 75°，new developed cracks are very small.

Key words： rock mechanics blasting stress wave incident angle initiation angle crack propagation

收稿日期: 2012-11-05

引用本文:

胡荣1，2，朱哲明1，2，胡哲源1，2，康骥鸣1，2. 爆炸动载荷下裂纹扩展规律的实验研究[J]. 岩石力学与工程学报, 2013, 32(7): 1476-1481.
HU Rong1，2，ZHU Zheming1，2，HU Zheyuan1，2，KANG Jiming1，2. EXPERIMENTAL STUDY OF REGULARITY OF CRACK PROPAGATION UNDER BLASTING DYNAMIC LOADS. , 2013, 32(7): 1476-1481.

链接本文:

http://www.rockmech.org/CN/Y2013/V32/I7/1476

[7]	朱哲明，李元鑫，周志荣，等. 缺陷岩体在爆炸荷载下的动态响应[J]. 岩石力学与工程学报，2011，30(6)：1 157-1 167.(ZHU Zheming，LI Yuanxin，ZHOU Zhirong，et al. The response of defected rock under blasting loads[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(6)：1 157-1 167.(in Chinese)) " target="_blank">
[9]	徐则民，黄润秋. 岩爆与爆破的关系[J]. 岩石力学与工程学报，2003，22(3)：414-419.(XU Zemin，HUANG Runqiu. Relationship between rock burst and blasting[J]. Chinese Journal Rock Mechanics and Engineering，2003，22(3)：414-419.(in Chinese))
[11]	LOEBER J F，SIH G C. Wave propagation in an elastic solid with a line of discontinuity of finite crack[J]. Quarterly of Applied Mathematics，1969，27(2)：711-721. " target="_blank">
[1]	ZHU Z M，MOHANTY B，XIE H P. Numerical investigation of blasting-induced crack initiation and propagation in rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(3)：412-424.
[4]	ZHOU Z T，ZHU Z M，JIN X X，et al. Numerical prediction of rock fracturing during the process of excavation[J]. International Journal of Geotechnical Earthquake Engineering，2010，1(2)：12-23. " target="_blank">
[8]	PARK D，JEON B，JEON S. A numerical study on the screening of blast-induced waves for reducing ground vibration[J]. Rock Mechanics and Rock Engineering，2009，42(3)：449-473.
[12]	阿肯巴赫. 弹性固体中波的传播[M]. 徐植信，洪锦如译. 上海：同济大学出版社，1992：370-386.(AKEN Bahe. Wave transmission in elastic solid[M]. Translated by XU Zhixing，HONG Jinru. Shanghai：Tongji University Press，1992：370-386.(in Chinese)) " target="_blank">
[16]	岳中文，杨仁树，郭东明，等. 爆炸应力波作用下缺陷介质裂纹扩展的动态分析[J]. 岩土力学，2009，30(4)：949-954.(YUE Zhongwen，YANG Renshu，GUO Dongming，et al. Dynamic analysis of crack propagation in media containing flaws under the explosive stress wave[J]. Rock and Soil Mechanics，2009，30(4)：949-954.(in Chinese)) " target="_blank">
[3]	ZHU Z M. Numerical prediction of crater blasting and bench blasting[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(6)：1 088-1 096. " target="_blank">
[6]	LI Y X，ZHU Z M. Study on the velocity of P waves across a single joint based on fractal and damage theory[J]. Engineering Geology，2012，151：82-88. " target="_blank">
[10]	LOEBER J F，SIH G C. Diffraction of antiplane shear waves by a finite crack[J]. Acoustical Society of America，1968，44(1)：90-98. " target="_blank">
[14]	ROSSMANITH H P，DAEHNKE A，KNASMILLNER R E K，et al. Fracture mechanics applications to drilling and blasting[J]. Fatigue and Fracture Engineering Materials and Structures，1997，20(11)： 1 617-1 636. " target="_blank">
[15]	肖同社，杨仁树，边亚东，等. 含节理岩体爆生裂纹扩展的动焦散模型实验研究[J]. 实验力学，2006，21(4)：539-545.(XIAO Tongshe，YANG Renshu，BIAN Yadong，et al. Dynamic caustics model experiment of blasting crack propagating on joint rock[J]. Journal of Experimental Mechanics，2006，21(4)：539-545.(in Chinese)) " target="_blank">
[2]	ZHU Z M，XIE H P，MOHANTY B. Numerical investigation of blasting-induced damage in cylindrical rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45(2)：111-121.
[18]	李清，张茜，李晟源，等. 爆炸应力波作用下分支裂纹动态力学特性实验[J]. 岩土力学，2011，32(10)：3 026-3 032.(LI Qing，ZHANG Xi，LI Shengyuan，et al. Experimental study of dynamic fracture behaviors of branched cracks under blasting stress wave[J]. Rock and Soil Mechanics，2011，32(10)：3 026-3 032.(in Chinese)) " target="_blank">
[5]	LI Y X，ZHU Z M，LI B X，et al. Study on the transmission and reflection of stress waves across joints[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(3)：364-371.
[13]	HARRIS J G. Diffraction by a crack of a cylindrical longitudinal pulse[J]. Journal of Applied Mathematics and Physics，1980，31(3)：367-383. " target="_blank">
[17]	杨仁树，岳中文，肖同社，等. 节理介质断裂控制爆破裂纹扩展的动焦散试验研究[J]. 岩石力学与工程学报，2008，27(2)：244-250.(YANG Renshu，YUE Zhongwen，XIAO Tongshe，et al. Dynamic caustics experiment on crack propagation of joined medium fracture with controlled blasting[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(2)：244-250.(in Chinese))