Relationship between in-situ stress and propagation direction of main cracks induced by blasting

GE Jinjin1,XU Ying1,2,CHENG Lin1,ZONG Qi1

Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (4) : 54-64.

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PDF(1945 KB)
Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (4) : 54-64.

Relationship between in-situ stress and propagation direction of main cracks induced by blasting

  • GE Jinjin1,XU Ying1,2,CHENG Lin1,ZONG Qi1
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Abstract

Rock blasting in tunneling showed that the rock failure in high in-situ stress environment was different from that in low in-situ stress condition or shallow rock mass. Especially, the propagation direction of main crack induced by blasting was greatly affected by the in-situ stresses. In this study, a transparent model similar material that conformed to the mechanical properties of hard rock is used to carry out the blasting similar model test under bidirectional load, to study the law of crack propagation in rock by blasting under initial in-situ stress. The experimental results show that the propagation of radial main cracks on specimens under initial static load is along the direction of maximum principal stress, which is different from that without in-situ stress; the propagation length and number of radial cracks decrease with the increase of lateral pressure coefficient; the Angle between propagation direction for the longest radial main crack and the direction of maximum principal stress increase with the increase of lateral pressure coefficient. Based on explosion mechanics, elasticity and stress wave theory, the relationship between initial in-situ stresses and propagation direction of main cracks induced by blasting in the rock is developed, that is, tan⁡φ=P_x/P_y (0< θ <45℃). It is verified that the angle between the propagation direction of main cracks and in-situ stress direction obtained by formula is basically consistent with that obtained from model test. This is of practical significance to understand the mechanism of rock fracture by blasting with high in-situ stresses.

Key words

High in-situ stress / rock blasting / crack propagation / transparent material / model test

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GE Jinjin1,XU Ying1,2,CHENG Lin1,ZONG Qi1. Relationship between in-situ stress and propagation direction of main cracks induced by blasting[J]. Journal of Vibration and Shock, 2023, 42(4): 54-64

References

[1] LU W B,Ming C,Xiang G, et al. A study of excavation sequence and contour blasting method for underground powerhouses of hydropower stations[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research,2012,29(none):31-39.
[2] Yi C,Johansson D,Greberg J. Effects of in-situ stresses on the fracturing of rock by blasting[J]. Computers and Geotechnics,2017,104(DEC.):321-330.
[3] YANG L Y,DING C X. Fracture mechanism due to blast-imposed loading under high static stress conditions[J]. International Journal of Rock Mechanics and Mining Sciences,2018,107:150-158.
[4] YANG R S,DING C X,YANG L Y,et al. Model experiment on dynamic behavior of jointed rock mass under blasting at high-stress conditions[J]. Tunnelling & Underground Space Technology,2018,74(APR.):145-152.
[5] 杨仁树,丁晨曦,杨立云. 高应力状态下穿过层理爆破致裂的动态行为研究[J]. 岩石力学与工程学报,2018,37(04):801-808.
YANG Ren-shu,DING Chen-xi,YANG Li-yun. Blast cracking of borehole-crossed bedding under high stress condition[J]. Chinese Journal of Rock Mechanics and Engineering,2018,37(04): 801-808.
[6] 岳中文,田世颖,张士春,等. 单向围压作用下切缝药包爆破爆生裂纹扩展规律的研究[J]. 振动与冲击,2019,38(23):186-195.
YUE Zhong-wen,TIAN Shi-ying,ZHANG Shi-chun,et al. Expanding law of cracks formed by slotted cartridge blast under unidirectional confining pressure[J]. Journal of Vibration and Shock,2019,38(23):186-195.
[7] 杨建华,孙文彬,姚池,等. 高地应力岩体多孔爆破破岩机制[J]. 爆炸与冲击,2020,40(07):118-127.
YANG Jian-hua,SUN Wen-bin,YAO Chi,et al. Mechanism of rock fragmentation by multi-hole blasting in highly-stressed rock masses[J]. Explosion and Shock Waves,2020,40(07):118-127.
[8] Kutter H K,Fairhurst C. On the fracture process in blasting[J]. International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts,1971,8(3):181-202.
[9] Rossmanith H P,Knasmillner R E,Daehnke A,et al. Wave propagation, damage evolution,and dynamic fracture extension. Part II. Blasting[J]. Materials Science,1996,32(4):403-410.
[10] 杨立云,马佳辉,王学东,等. 压应力场中爆生裂纹分布与扩展特征实验分析[J]. 爆炸与冲击,2017,37(02): 262-268.
YANG Li-yun,MA Jia-hui,WANG Xue-dong,et al. Experimental study on blasting crack initiation and propagation behavior in compression stress field[J]. Explosion and Shock Waves,2017,37(02): 262-268.
[11] 张志呈,肖正学,胡健,等. 岩体爆震传播时应力场的波导效应试验研究[J]. 化工矿物与加工,2005(07): 21-24.
ZHANG Zhi-cheng,XIAO Zheng-xue,HU Jian,et al. Experimental study on the wave transmission effect of the initial stress field as transmitting of quake wave from rock blasting[J]. Chemical Minerals and Processing,2005(07): 21-24.
[12] 肖正学,张志呈,李端明. 初始应力场对爆破效果的影响[J]. 煤炭学报,1996(05): 51-55.
XIAO Zheng-xue,ZHANG Zhi-cheng,LI Duan-ming. The influence of initial stress field on blasting[J]. Journal of China Coal Society,1996(05): 51-55.
[13] 许国安. 深部巷道围岩变形损伤机理及破裂演化规律研究[博士学位论文][D]. 徐州:中国矿业大学,2011.
XU Guo-an. Research on the Mechanism and Evolution Law of Rock Deformation and Cracking around Deep Tunnels[Ph. D. Thesis][D]. Xuzhou:China University of Mining & Technology,2011.
[14] 徐颖,袁璞. 爆炸荷载下深部围岩分区破裂模型试验研究[J]. 岩石力学与工程学报,2015,34(S2): 3844-3851.
XU Ying,YUAN Pu. Model test of disintegration in deep rock under blasting load[J]. Chinese Journal of Rock Mechanics and Engineering,2015,34(S2): 3844-3851.
[15] Ge J J,Xu Y. A Method for Making Transparent Hard Rock-Like Material and Its Application[J]. Advances in Materials Science and Engineering,2019,2019(2): 1-14.
[16] 葛进进. 初始应力状态下岩石爆破裂纹扩展的模型试验研究[博士学位论文][D]. 淮南:安徽理工大学,2020.
GE Jin-jin. Experimental Study on Crack Propagation of Rock Blasting under Initial Stress State[Ph. D. Thesis][D]. Huainan:Anhui University of Science and Technology,2020.
[17] 袁文华,马芹永,黄伟. 楔形掏槽微差爆破模型试验与分析[J]. 岩石力学与工程学报,2012,31(S1):3352-3356.
YUAN Wen-hua,MA Qin-yong,HUANG Wei. Model Experiment and Analysis of Wedge-Shaped Cutting Millisecond Blasting[J]. Journal of Rock Mechanics and Engineering,2012,31(S1):3352-3356.
[18] 徐颖,孟益平,吴德义. 爆破工程[M]. 武汉:武汉大学出版社,2014.
XU Ying,MENG Yi-ping,WU De-yi. Blasting engineering[M]. Wuhan:Wuhan University Press,2014.
[19] 戴俊. 岩石动力学特性与爆破理论(第2版)[M]. 冶金工业出版社,2013.
DAI Jun. Deynamic behaviors and blasting theory of rock (the second editon)[M]. Metallurgical Industry Press,2013.
[20] GE J J,XU Y,HUANG W,et al. Experimental Study on Crack Propagation of Rock by Blasting under Bidirectional Equal Confining Pressure Load[J]. Sustainability,2021,13(21):12093.
[21] Brown E T,Hoek E. Trends in relationships between measured in-situ, stresses and depth[J]. International Journal of Rock Mechanics &amp; Mining Science &amp; Geomechanics Abstracts,1978,15(4): 211-215.
[22] 刘泉声,刘恺德. 淮南矿区深部地应力场特征研究[J]. 岩土力学,2012,33(07):2089-2096.
Liu Quan-sheng,Liu Kai-de. Characteristics of in-situ stress field for deep levels in Huainan coal mine[J]. Rock Soil Mech,2012,33(7):2089-2096.
[23] 戴俊,钱七虎. 高地应力条件下的巷道崩落爆破参数[J]. 爆炸与冲击,2007(03):272-277.
Dai Jun,Qian Qi-hu. Break blasting parameters for driving a roadway in rock with high residual stress[J]. Explosion and Shock Waves,2007,27(3):272-277.
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