深埋隧洞开挖爆破损伤数值模拟及损伤机制研究

doi:10.13722/j.cnki.jrme.2020.0817

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1543 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Damage induced by blasting excavation influences the surrounding rock state，which directly affects the construction safety and support design. The effect of stress filed has on blasting damage mechanism has not been fully revealed，and the existing damage simulation method has deficiencies in simulating large-scale explosion. Based on the excavation in the auxiliary tunnel of Jinping II hydropower station，a method of blasting damage simulation based on the normal direction impact load is proposed. And the simulation and field detecting test results is compared to verify the feasibility of the simulation method. Meanwhile，the method is adopted to discuss the influence ground stress has on damage zone. The results indicated that the damage zone can be effectively simulated by the normal direction impact load，and the ratio of the maximum mesh size to the minimum mesh size can be reduced by 82% and the calculation time can be reduced by 50% to 87%. The results also show that the blasting damage depth of tunnel excavation has a significant correlation with the in-situ stress level，and the damage depth increase after decreasing with stress level increases. And the reason why the ground stress "inhibited" the blasting damage zone was due to the fact that when the damage zone was simulated with ground stress，the application of the blast load increased the yield limit of the surrounding rock to some extent；under the conditions of the study of this paper，when the ground stress level is low(less than 12.5 MPa)，the shearing damage is the main part of blasting damage，while the local stress level continues to increase，shear damage is inhibited，and the blasting mainly causes pure shearing damage.

Key words： rock mechanics deep tunnel blast damage ground stress normal direction impact load mechanism of blasting damage

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LUO Sheng1
	2
	YAN Peng1
	2
	LU Wenbo1
	2
	CHEN Ming1
	2
	WANG Gaohui1
	2

Cite this article:

LUO Sheng1,2,YAN Peng1, et al. Research on the simulation of blasting damage and its mechanism of deep tunnel excavation [J]. , 2021, 40(S1): 2760-2772.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0817 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/IS1/2760

[1] MARTINO J B，CHANDLER N A. Excavation-induced damage studies at the Underground Research Laboratory[J]. International Journal of Rock Mechanics and mining sciences，2004，41(8)：1 413–1 426. [2] 严鹏，单治钢，陈祥荣，等. 深部岩体爆破损伤及控制研究[C]// 第三届全国岩土与工程学术大会论文集. [S. l.]：[s. n.]，2009：508–512.(YAN Peng，SHAN Zhigang，CHEN Xiangrong，et al. Research on the damage zone and its control of deep tunnel[C]// Proceedings of the 3rd GeoEng China. [S. l.]：[s. n.]，2009：508–512.(in Chinese)) [3] XIE L T，YAN P，LU W B，et al. Effects of strain energy adjustment： a case study of rock failure modes during deep tunnel excavation with different methods[J]. KSCE Journal of Civil Engineering，2018，(22)：4 143–4 154. [4] 范勇，卢文波，周宜红，等. 高地应力条件下深埋洞室围岩损伤区孕育机制[J]. 工程地质学报，2017，25(2)：308–316.(FAN Yong，LU Wenbo，ZHOU Yihong，et al. Evolution mechanism of damage zone in surrounding rock mass during excavation of deep tunnels under high geostress condition [J]. Journal of Engineering Geology，2017，25(2)：308–316.(in Chinese)) [5] READ R S. 20 years of excavation response studies at AECL?s Underground Research Laboratory[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(8)：1 251–1 275. [6] 周栋，赵志宏，赵佳鹏. 高应力区大尺度隧洞开挖损伤区范围预测研究[J]. 岩土工程学报，2016，38(增2)：67–72.(ZHOU Dong，ZHAO Zhihong，ZHAO Jiapeng. Prediction of excavation damage zone of a deep tunnel with large size subjected to high in-situ stress[J]. Chinese Journal of Geotechnical Engineering，2016，38(Supp.2)：67–72.(in Chinese)) [7] 杨小林，王树仁. 岩石爆破损伤及数值模拟[J]. 煤炭学报，2000，25(1)：21–25.(YANG Xiaoling，WANG Shuren. Rock damage by blasting and its numerical simulation[J]. Journal of China Coal Society，2000，25(1)：21–25.(in Chinese)) [8] 王志亮，郑明新. 基于TCK损伤本构的岩石爆破效应数值模拟[J]. 岩土力学，2008，29(1)：233–237.(WANG Zhiliang，ZHENG Mingxin. Numerical simulation of effect of rock blasting based on TCK damage constitutive model[J]. Rock and Soil Mechanics，2008，29(1)：233–237.(in Chinese)) [9] SAIANG D，NORDLUND E. Numerical analyses of the influence of blast-Induced damaged rock around shallow tunnels in brittle rock [J]. Rock Mechanics and Rock Engineering，2009，42(3)：421–448. [10] CASTRO L A M，MCCREATH D R，OLIVER P. Rock mass damage initiation around the sudbury neutrino observatory cavern[C]// Proceedings of the 2nd North American Rock Mechanics Symposium. [S. l.]：[s. n.]，1996：1 589–1 595. [11] ANDERSSON J C，MARTIN C D. The ?sp? pillar stability experiment：part I—experiment design[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(5)：865–878. [12] CAI M，KAISER P K，TASAKA Y，et al. Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(5)：833–847. [13] KAISER P K，ZOU D，LANG P A. Stress determination by back-analysis of excavation-induced stress changes—a case study[J]. Rock Mechanics and Rock Engineering，1990，23(3)：185–200. [14] 陈明，卢文波，胡英国. 爆破开挖扰动对深埋隧洞围岩损伤区的影响研究[EB/OL]. 北京：中国科技论文在线. http：// www.paper.edu.cn/releasepaper/content/201103–223.[2011–03–04].(CHEN Ming，LU Wenbo，HU Yingguo. Study on the influence of blasting excavation disturbance to deep tunnel rock mass damage zone [EB/OL]. Beijing：Sciencepaper Online. http：//www.paper.edu.cn/ releasepaper/content/201103–223.[2011–03–04].(in Chinese)) [15] 卢文波，周创兵，陈明，等. 开挖卸荷的瞬态特性研究[J]. 岩石力学与工程学报，2008，27(11)：2 184–2 192.(LU Wenbo，ZHOU Chuangbing，CHEN Ming，et al. Research on transient characteristics of excavation unloading [J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(11)：2 184–2 192.(in Chinese)) [16] 严鹏，卢文波，单治钢，等. 深埋隧洞爆破开挖损伤区检测及特性研究[J]. 岩石力学与工程学报，2009，28(8)：1 552–1 561.(YAN Peng，LU Wenbo，SHAN Zhigang，et al. Detecting and study of blasting excavation-induced damage of deep tunnel and its characters[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 552–1 561.(in Chinese)) [17] HAIBO L，XIANG X，JIANCHUN L，et al. Rock damage control in bedrock blasting excavation for a nuclear power plant[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(2)：210–218. [18] 杨军，金乾坤. 应力波衰减基础上的岩石爆破损伤模型[J]. 爆炸与冲击，2000，20(3)：241–246.(YANG Jun，JIN Qiankun. A new damage model for rock fragmentation by blasting based on stress wave attenuation [J]. Explosion and Shock Waves，2000，20(3)：241–246.(in Chinese)) [19] CHO S H，KANEKO K. Influence of the applied pressure waveform on the dynamic fracture processes in rock [J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(5)：771–784. [20] 胡英国，卢文波，金旭浩，等. 岩石高边坡开挖爆破动力损伤的数值仿真[J]. 岩石力学与工程学报，2012，31(11)：2 204–2 213.(HU Yingguo，LU Wenbo，JIN Xuhao，et al. Numerical simulation for excavation blasting dynamic damage of rock high slope[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(11)：2 204–2 213.(in Chinese)) [21] YAN P，LU W B，CHEN M. et al. Contributions of in-situ stress transient redistribution to blasting excavation damage zone of deep tunnels[J]. Rock Mechanics and Rock Engineering，2015，48(2)：715–726. [22] LU W，YANG J，YAN P，et al. Dynamic response of rock mass induced by the transient release of in-situ stress[J]. International Journal of Rock Mechanics and Mining Sciences，2012，53：129–141. [23] LU W，YANG J，CHEN M，et al. An equivalent method for blasting vibration simulation[J]. Simulation Modelling Practice and Theory，2011，19(9)：2 050–2 062. [24] SHIN J H，MOON H G，CHAE S E. Effect of blast-induced vibration on existing tunnels in soft rocks[J]. Tunnelling and Underground Space Technology，2011，26(1)：51–61. [25] 张国华，陈礼彪，夏祥，等. 大断面隧道爆破开挖围岩损伤范围试验研究及数值计算[J]. 岩石力学与工程学报，2009，28(8)：1 610–1 619.(ZHANG Guohua，CHEN Libiao，XIA Xiang，et al. Numerical simulation and experimental study of damage range of surrounding rock in large tunnel under blasting excavation[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 610–1 619.(in Chinese)) [26] 杨建华，卢文波，陈明. 炮孔爆炸荷载变化历程的确定[C]// 全国工程安全与防护学术会议. [S. l.]：[s. n.]，2010：773–777.(YANG Jianhua，LU Wenbo，CHEN Ming. Determination of the blasting load variation in borehole [C]// Proceedings of National Conference on Engineering Safety and Security. [S. l.]：[s. n.]，2010：773–777.(in Chinese)) [27] LU Y，WANG Z，CHONG K. A comparative study of buried structure in soil subjected to blast load using 2D and 3D numerical simulations[J]. Soil Dynamics and Earthquake Engineering，2005，25(4)：275–288. [28] YU C，LIU W H，LI L Z. Studies on the JWL equation of state of detonation products for RHT-902 and Octol[J]. Combustion Explosion and Shock Waves，1993，13(2)：172–177. [29] 戴俊. 岩石动力学特性与爆破理论[M]. 北京：冶金工业出版社，2002：235–237.(DAI Jun. Dynamic behaviors and blasting theory of rock[M]. Beijing：China Metallurgical Industry Press，2002：235–237.(in Chinese)) [30] 杨建华. 深部岩体开挖爆破与瞬态卸荷耦合作用效应[博士学位论文][D]. 武汉：武汉大学，2014.(YANG Jianhua. Coupling effect of blasting and transient release of in-situ stress during deep rock mass excavation[Ph. D. Thesis][D]. Wuhan：Wuhan University，2014.(in Chinese)) [31] 付玉华，李夕兵，董陇军，等. 损伤条件下深部岩体巷道光面爆破参数研究[J]. 岩土力学，2010，31(5)：1 420–1 426.(FU Yuhua，LI Xibing，DONG Longjun，et al. Analysis of smooth blasting parameters for tunnels in deep damaged rock mass[J]. Rock and Soil Mechanics，2010，31(5)：1 420–1 426.(in Chinese)) [32] 穆朝民，潘飞. 煤体在爆炸荷载和地应力耦合作用下裂纹扩展的数值模拟[J]. 高压物理学报，2013，27(3)：403–410.(MU Chaomin， PAN Fei. Numerical study on the damage of the coal under blasting loads coupled with geostatic stress[J]. Chinese Journal of High Pressure Physics，2013，27(3)：403–410.(in Chinese)) [33] 白羽，朱万成，魏晨慧，等. 不同地应力条件下双孔爆破的数值模拟[J]. 岩土力学，2013，34(增1)：466–471.(Bai Yu，ZHU Wancheng，WEI Chenhui，et al. Numerical simulation on two-hole blasting under different in-situ stress conditions[J]. Rock and Soil Mechanics，2013，34(Supp.1)：466–471.(in Chinese))