The simulation experiment about mechanism of adjacent tunnel crack extension induced by explosion impacting load

PDF(1609 KB)

Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (2) : 178-183.

GUO Dong-ming1,2，LIU Kang1，YANG Ren-shu1,2，LI Yuan1

Author information +

History +

Abstract

In order to explore mechanism of extension of the nearby crack defects in the roadway under explosion load, transmission type dynamic caustics experimental system is adopted to carry out the simulated experimental study. The experimental results show that the propagation mechanism of recessive crack which is located at meeting-blast side results from that the existing tunnel makes the leading effect of prefabricated crack more notable, which guides the propagation crack from the explosive source meets the left cutting-edge of prefabricated crack and diffract to the right cutting-edge, the right cutting-edge start to extend under the stretching influence of diffraction wave, when the distance between the prefabricated crack and the left panel of tunnel is 10 mm. For prefabricated recessive crack of back-blast side, when the spacing between the prefabricated crack and the right panel of tunnel is 4 mm, the expansion of crack result from that weak free surface of roadway guides the diffraction stress wave to crack defects, crack extends subjected to tensile stress. Compare the prefabricated crack extension condition when roadway exists with that of no roadway, the existing roadway increases dynamic stress concentration at the crack defects, inducing crack extension under the effect of the explosive stress wave.

Key words

explosion load / adjacent tunnel / crack propagation / dynamic caustics

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

GUO Dong-ming1,2，LIU Kang1，YANG Ren-shu1,2，LI Yuan1. The simulation experiment about mechanism of adjacent tunnel crack extension induced by explosion impacting load[J]. Journal of Vibration and Shock, 2016, 35(2): 178-183

References

[1] 贺永年,韩立军,邵鹏,等.深部巷道稳定性的若干岩石力学问题[J].中国矿业大学学报,2006,35(3):288-295.
HE Yong-nian, HAN Li-jun, SHAO Peng, et al. Some problems of rock mechanics for roadways stability in depth[J]. Journal of China University of Mining & Technology, 2006,35(3):288-295.
[2] 陈剑杰,孙钧,林俊德,等.强爆炸应力波作用下岩石地下洞室的破坏现象学[J].解放军理工大学学报,2007,8(6): 582-588.
CHEN Jian-jie, SUN Jun, LIN Jun-de, et al. Failure of rock openings under intensive explosion stress wave[J]. Journal of PLA University of Science and Technology, 2007,8(6):582-588.
[3] 杨仁树,高祥涛,车玉龙,等.基于HHT 方法的爆炸应变波时频分析[J].振动与冲击,2014,33(10):17-21.
YANG Ren-shu, GAO Xiang-tao, CHE Yu-long, et al. Joint time-frequency analysis of blast strain wave based on Hilbert-Huang transformation[J].Journal of Vibration and Shock, 2014,33(10):17-21.
[4] 田志敏,邬玉斌,罗奇峰. 隧道内爆炸冲击波传播特性及爆炸荷载分布规律研究[J].振动与冲击,2011,30(1):21- 26.
TIAN Zhi-min, WU Yu-bin, LUO Qi-feng. Characteristics of in-tunnel explosion-induced air shock wave and distribution law of reflected shock wave load[J]. Journal of Vibration and Shock,2011,30(1):21-26.
[5] 孔德森,孟庆辉,张伟伟,等.爆炸荷载作用下地铁隧道的冲击反应研究[J].振动与冲击,2012,31(12):68-72.
KONG De-seng, MENG Qing-hui, ZHANG Wei-wei, et al. Shock responses of a metro tunnel subjected to explosive loads[J]. Journal of Vibration and Shock, 2012,31(12):68- 72.
[6] 谭忠盛,杨小林,王梦恕.复线隧道施工爆破对既有隧道的影响分析[J].岩石力学与工程学报,2003,22(2):281- 285.
TAN Zhong-sheng, YANG Xiao-lin, WANG Meng-shu. Effect of blast in double line tunnel on existing tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(2): 281-285.
[7] 吴亮,钟冬望. 不同布置条件下邻近隧道掘进爆破对既有隧道的影响[J]. 煤炭学报, 2009, 34(10): 1339-1343.
WU Liang, ZHONG Dong-wang. Effect of tunneling blasting on the existing adjacent tunnel under different conditions[J]. Journal of China Coal Society, 2009, 34(10): 1339-1343.
[8] 钟冬望,吴亮,余刚. 邻近隧道掘进爆破对既有隧道的影响[J]. 爆炸与冲击, 2010, 30(5): 456-462.
ZHONG Dong-wang, WU Liang, YU Gang. Effect of tunneling blasting on the existing adjacent tunnel[J]. Explosion and Shock Waves, 2010, 30(5): 456-462.
[9] 李宁,顾强康,张承客. 相邻洞室爆破施工对已有洞室的影响[J]. 岩石力学与工程学报, 2009, 28(1): 31-38.
LI Ning, GU Qiang-kang, ZHANG Cheng-ke. Influence of blasting on excavation of a new tunnel adjacent to existing tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(1): 30-38.
[10] 李宁,张承客,周钟. 边坡爆破开挖对邻近已有洞室影响研究[J].岩石力学与工程学报, 2012, 31(2): 3471-3477.
LI Ning, ZHANG Cheng-ke, ZHOU Zhong. Influence research of slope blasting excavation on adjacent existed tunnel[J].Chinese Journal of Rock Mechanics and Engineering, 2012, 31(2): 3471-3477.
[11] 彭道富,李忠献,杨年华. 近距离爆破对既有隧道的振动影响[J]. 中国铁道科学, 2005, 26(4): 73-76.
PENG Dao-fu, LI Zhong-xian, YANG Nian-hua. Vibration effect at existing tunnel Induced by close-in blasting[J]. China Railway Science, 2003, 26(4): 73-76.
[12] 郭东明,刘康,王雁冰,等. 爆炸荷载对邻近巷道裂纹群影响规律动焦散试验[J].煤炭学报,2014,39(增1) :64- 69.
GUO Dong-ming, LIU Kang, WANG Yan-bing, et al. Dynamic caustics test of blast load impact on the group of crack surrounding neighboring roadway[J]. Journal of China Coal Society, 2014, 39(Sup1) :64- 69.
[13] 王蒙,朱哲明,曾利刚.巷道周边裂纹应力强度因子的实验研究[J].四川大学学报,2012,44(1):99-103.
WANG Meng, ZHU Zhe-ming, ZENG Li-gang. The actual studies about stress intensity factor of crack surrounding roadway[J]. Journal of Sichuan University, 2012, 44 (1) : 99-103.
[14] 徐则民,黄润秋.岩爆与爆破关系[J].岩石力学与工程学报,2003,22(3):414-419.
XU Ze-min, HUANG Run-qiu. Relationship between Rock Burst and Blasting[J].Chinese Journal of Rock Mechanics and Engineering, 2003,22(3):414-419.
[15] 杨仁树,王雁冰,杨立云,等. 双孔切槽爆破裂纹扩展的动焦散试验[J].中国矿业大学学报,2012,41(6):868-872.
YANG Ren-shu, WANG Yan-bing, YANG Li-yun ,et al. Dynamic caustics experimental study on crack propagation in two borehole cut blasting[J]. Journal of China University of Mining and Technology,2012,41(6): 868-872.
[16] 李清,杨仁树. 节理介质中爆炸裂纹扩展的细观行为研究[J]. 中国矿业大学学报,2002,31(3):271-274.
LI Qing, YANG Ren-shu. Microscopic behavior research of blast crack extension in the joint medium[J]. Journal of China University of Mining and Technology,2002,31(3): 271-274.
[17] 姚学锋,方竞,熊春阳.爆炸应力波作用下裂纹与孔洞的动态焦散线分析[J].爆炸与冲击,1998,18(3):232-236.
YAO Xue-feng, FANG Jing, XIONG Chun-yang. Dynamic caustics analysis of cracks and holes subjected to explosion stress wave[J].explosion and impact,1998,
19 (3):232-236.
[18] 穆朝民,齐娟. 爆炸荷载作用下煤体裂纹扩展机理模型实验研究[J]. 振动与冲击,2012,31(13):58-61.
MU Chao-min, QI Juan. Model investigation on cracks propagation in coal under blast loading[J]. Journal of Vibration and Shock, 2012,31(13):58-61.
[19] 杨仁树,杨立云,岳中文,等.数字激光动态焦散线实验方法和系统[P].中国,201110366309.9,2012-07-04.
[20] 郭东明,刘康,杨仁树,等. 爆破对邻近巷道背爆侧倾斜裂纹影响实验研究[J].采矿与安全工程学报, 2015, 32(1): 99-104.
GUO Dong-ming, LIU Kang, YAN Ren-shu, et al. Experimental research on the influence of blasting on the inclined crack in the back-blasting side of nearby roadway [J]. Journal of Mining & Safety Engineering, 2015, 32(1): 99-104.
[21] 郭东明,刘康,杨仁树,等. 爆炸荷载对邻近巷道背爆侧裂纹的影响规律[J].煤炭学报, 2014, 39(12):2355-2361.
GUO Dong-ming, LIU Kang, YAN Ren-shu, et al. Effects of blast load on crack in back-blast side of adjacent tunnel[J]. Journal of China Coal Society, 2014, 39(12): 2355-2361.
[22] 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,2013,32(7):1477- 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, 32(7): 1477-1481.
[23] 李清,杨仁树,李均雷,等. 爆炸荷载作用下动态裂纹扩展试验研究[J].岩石力学与工程学报,2005,24(16): 2912- 2916.
LI Qing, YANG Ren-shu, LI Jun-lei, et al. Experimental study on propagation of dynamic cracks under blasting loading[J].Chinese Journal of Rock Mechanics and Engineering, 2005,24(16):2912-2916.
[24] 盖秉政.论弹性波绕射与动应力集中问题[J].力学进展,1987,17(4):447-465.
GAI Bing-zheng. The discuss of elastic wave diffraction and dynamic stress concentration problem [J]. Journal of Mechanics, 1987,17 (4): 447-465.