爆生裂纹与层理缺陷相互作用的实验研究

岳中文?,胡庆文,陈彪

振动与冲击 ›› 2017, Vol. 36 ›› Issue (12) : 99-104.

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (12) : 99-104.
论文

爆生裂纹与层理缺陷相互作用的实验研究

  • 岳中文?,胡庆文,陈彪
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The experimental study of the interaction between the blast-induced crack and the bedding defect

  •   YUE Zhong-wen,HU Qing-wen,Chen Biao
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摘要

为了研究爆生裂纹与层理缺陷的相互作用机制,采用新型数字激光动态焦散线实验方法对含层理岩体在爆炸载荷下的动态断裂行为进行了实验分析。实验结果表明:在爆炸载荷下,当炮孔切槽方向与层理面存在一定夹角θ时,爆炸使层理岩体裂纹扩展分为爆生主裂纹、界面裂纹、次生裂纹三个阶段。爆生主裂纹扩展到层理面后,不是直接贯通层理面沿原方向继续扩展,而是产生界面裂纹之后再继续扩展,产生的界面裂纹长度随夹角θ增大而减小。裂纹扩展贯通层理后,次生裂纹继续扩展,随夹角θ的增大,次生裂纹扩展长度逐渐增大。爆生主裂纹扩展过程中,随着爆生主裂纹尖端至层理面距离的减小,爆生主裂纹尖端动态应力强度因子和裂纹扩展速度均逐渐减小,说明层理面对爆生主裂纹的扩展起阻碍作用,且夹角θ越大阻碍作用越明显。

Abstract

For the purpose of studying the interaction between blast-induced cracks and bedding defects , the new digital-laser dynamic caustic system is utilized to investigate the fracture behavior of bedding rock under explosive load. The results shows that, under explosive load, when there is a certain angle θ between the grooving direction of blast hole and the bedding surface, the crack propagation of bedding rock is divided into three stages: the main blast-induced crack, the interface crack and the secondary crack . After the main blast-induced crack propagates to the bedding surface,rather than passing through in the original direction, it causes the initiation of the interface crack before its redevelopment. The length of interface crack decrease with the increase of the angle θ. The secondary crack keeps on developing after the transversal of the crack propagation in the bedding surface. With the increase of θ, the extended distance of the secondary crack rises gradually. During the main blast-induced crack propagation, the crack propagating velocity and the dynamic stress intensity factor (DSIF) of crack tip decline gradually with the decrease of the distance between the bedding surface and main crack tip, indicating that bedding surface has a resistant effect on the main blast-induced crack propagation and such effect the stronger with the increase of the angle θ.

关键词

焦散线 / 层理岩体 / 爆炸荷载 / 动态应力强度因子

Key words

Caustic / Bedding rock / Blasting load / Dynamic stress intensity factor

引用本文

导出引用
岳中文?,胡庆文,陈彪. 爆生裂纹与层理缺陷相互作用的实验研究[J]. 振动与冲击, 2017, 36(12): 99-104
YUE Zhong-wen,HU Qing-wen,Chen Biao. The experimental study of the interaction between the blast-induced crack and the bedding defect[J]. Journal of Vibration and Shock, 2017, 36(12): 99-104

参考文献

[1] ZHAO Y,Zhao G F,Jiang Y,et al. Effects of bedding on the dynamic indirect tensile strength of coal:Laboratory experiments and numerical simulation[J]. International Journal of Coal Geology,2014, 132(1):81-93.
[2] Fourney W L, Barker D B, Holloway D C. Fragmentation in jointed rock material[C]. Proceedings of the First Int. Symposium on Rock Fragmentation by Blasting. Lulea, Sweden. 1983: 505-531.
[3] YANG Z G, Rustan A. The influence from a primary structure on fragmentation. Proc 1st Int Symp on Rock Fragment by Blasting, Lulea, Sweden,1983:581-603.
[4] Margolin L G. Los Alamos National Laboratory Report. LA-10249,1985:234-241.
[5] 李夕兵. 论岩体软弱结构面对应力波传播的影响[J]. 爆炸与冲击,1993,13(4):334-342.
LI Xi-bing. Influence of the structural weakness planes in rock mass on the propagation of stress waves[J]. Explosion and Shock Waves, 1993,13(4):334-342.
[6] Ozcelik Y. Effect of discontinuities on fragment size distribution in open-pit blasting: A Case Study[J]. Transactions-Institution of Mining and Metallurgy. Section A. Mining Industry, 1998, 107:146-151.
[7] 余永强, 邱贤德, 杨小林. 层状岩体爆破损伤断裂机理分析[J]. 煤炭学报, 2004, 29(4):409-412.
YU Yong-qiang,QIU Xian-de,YANG Xiao-lin. The mechanism analyses of bedded rock blasting damage and fracture[J].Journal of China Coal Society,2004,29(4):409-412.
[8] 肖同社, 杨仁树, 庄金钊, 等. 节理岩体爆生裂纹扩展动态焦散线模型实验研究[J]. 爆炸与冲击,2007,02:159-164.
XIAO Tong-she, YANG Ren-shu, ZHUANG Jin-zhao, et al. Dynamic caustics model experiment of blasting crack developing on sandwich rock[J]. Explosion and Shock Waves,2007,27(2):159-164.
[9] 黄书岭, 徐劲松, 丁秀丽, 等. 考虑结构面特性的层状岩体复合材料模型与应用研究[J]. 岩石力学与工程学报,2010,29(4):744-756.
HUANG Shu-ling,XU Jin-song,DING Xiu-li, et al. Study of layered rock mass composite model based on characteristics of structural plane and its application [J]. Chinese Journal of Rock  Mechanics and Engineering, 2010,29(4):744-756.
[10] 宋小林. 层状岩体爆破的层裂效应及其对顺层边坡稳定性的影响研究[D]. 成都,西南交通大学,2008.
SONG Xiao-lin. Study on the stratification cracking effect of the layered rock slope caused by blasting and its influence on the stability of layered slope[D]. Chengdu, Southwest Jiaotong university,2008.
[11] 杨仁树, 岳中文, 董聚才, 等. 断续节理介质爆生裂纹扩展的动焦散实验研究[J]. 中国矿业大学学报,2008,04:467-472.
YANG Ren-shu, YUE Zhong-wen, DONG Ju-cai, et al. Dynamic caustics experiment of blasting crack propagation in discontinuous jointed material[J]. Journal of China University of Mining & Technology, 2008,04:467-472.
[12] 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 Zhong-wen,YANG Ren-shu,GUO Dong-ming,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.
[13] 李清. 爆炸致裂的岩石动态力学行为与断裂控制试验研究[D]. 北京,中国矿业大学(北京),2009.
LI Qing. Experiment of fracture behaviors and control for crack propagation under blasting load[D]. Beijing, China University of Mining & Technology, Beijing,2009.
[14] 胡荣, 朱哲明, 胡哲源, 等. 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,2013,07:1476-1481.
HU Rong, ZHU Zhe-ming, HU Zhe-yuan, et al. Experimental study of regularity of crack propagation under blasting dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering, 2013,07:1476-1481.
[15] Theocaris P S, Andrianopoulos N P. Dynamic three-point bending of short beams studied by caustics[J]. International Journal of Solids and Structures, 1981, 17(7): 707-715.
[16] 范天佑. 断裂动力学原理与应用. 北京:北京理工大学出版社,2006: 38-43.
FAN Tian-you. Principle and application of fracture dynamics. Beijing: Beijing Institute of Technology Press,2006: 38-43.
[17] 张财贵,曹福,李炼,等. 采用压缩单列纹圆孔板确定岩石动态起裂、扩展、和止裂韧度[J]. 力学学报,2016,48(3): 624-635.
ZHANG Cai-gui, CAO Fu, LI Lian, et al. Determination of dynamic fracture initiation, propagation, and arrest toughness of rock using SCDC specimen[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(3): 624-635
[18] Irwin GR, Wells AA. A continuum mechanics view of crack propagation. Metallurgical Reviews,1965, 91: 223-270.
[19] Freund LB. Dynamic fracture mechanics. Cambridge: Cambridge University Press, 1990.
[20] Ravi-Chandar K. Dynamic Fracture. Elsevier, 2004: 49-69, 168-175.
[21] YUE Z W,Yang L Y, Wang Y B. Experimental study of crack propagation in polymethyl methacrylate material with double holes under the directional controlled blasting[J]. Fatigue & Fracture of Engineering Materials & Structures, 2013,36:827-833.
[22] Nakagawa K, Sakamoto T, Yoshikai R. Model study of the guide hole effect on the smooth blasting[J]. J Jpn Exp Soc, 1982, 43: 75-82.
[23] Kutter H K, Fairhurst C. On the fracture process in blasting[C]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts. Pergamon, 1971, 8(3): 181IN1189-188IN10202.
[24] Rossmanith H P, Daehnke A, Nasmillner R E K, et al. Fracture mechanics applications to drilling and blasting[J]. Fatigue & Fracture of Engineering Materials & Structures, 1997, 20(11): 1617-1636.

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