基于节理岩体多尺度建模方法的隧道块体垮塌失稳特征与支护优化设计研究

doi:10.3724/1000-6915.jrme.2024.0560

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Abstract The uncertainty in the development patterns and combinations of structural surfaces makes it difficult for the effective prevention and control of disasters such as landslides and block falls during the excavation of jointed rock tunnels. It is crucial to consider the impact of weak-scale joints on the mechanical properties of the surrounding rock，as well as the controlling effect of large-scale structural planes on local stability，in order to provide reasonable support. To this end，based on the morphological distribution law of two-dimensional trace lines in sequential tunnel face images，the rapid extension and prediction of dominant structural planes in three-dimensional space have been achieved. Using the embedding coefficient method in Sadovsky?s theory，the theoretical values for different structural plane scale divisions were determined. By employing the secondary development function of 3DEC，a multi-scale DFN-DEM equivalent modeling method for jointed rock masses was proposed，constructing an equivalent rock mass model that retains only the dominant structural planes and large-scale joint sets. This method was validated and analyzed through a series of tests conducted in the Erlangshan Tunnel project of Linzi-Linyi Expressway in Shandong Province. The results indicate that the multi-scale equivalent modeling method for jointed rock masses，which incorporates the dominant structural plane extension method，more effectively reveals the collapse evolution laws of the local surrounding rock in tunnels，especially the morphological distribution characteristics of key block groups. The rose diagram of hazardous rock groups provide a theoretical basis for understanding the spatial distribution of overbreak caused by dangerous rockfall in tunnels from a probability and statistics perspective. By integrating these methods，targeted support schemes can be provided for structure-controlled surrounding rock，offering both a theoretical basis and field guidance for the prevention and control of local collapse instability in jointed rock mass tunnel engineering.

Key words： rock mechanics jointed rock mass multi-scale modeling block collapse targeted support

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	Articles by authors
	HE Peng1
	AN Jie1
	SHI Shaoshuai2
	HU Jie3
	WU Weitao4
	YAN Zhiqiang2

Cite this article:

HE Peng1,AN Jie1,SHI Shaoshuai2, et al. Tunnel block collapse instability characteristics and optimized design of targeted support based on multi-scale modeling method[J]. , 2025, 44(5): 1204-1218.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2024.0560 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I5/1204

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[19]	LIU Z，WANG H，ZHANG C，et al. Size dependences of the mechanical behaviors of basalt rock blocks with hidden joints analyzed using a hybrid DFN-FDEM model[J]. Engineering Fracture Mechanics，2021，258：108 078.
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[22]	禹海涛，何爽，李攀，等. 基于地层参数随机场模型的长隧道纵向地震响应分析[J]. 隧道与地下工程灾害防治，2020，2(3)：58-66.(YU Haitao，HE Shuang，LI Pan，et al. Longitudinal seismic response analysis of long tunnels based on random field model of strata parameters[J]. Tunnel and Underground Engineering Disaster Prevention，2020，2(3)：58-66.(in Chinese))
[23]	张雨霆，肖明，丁秀丽等. 复杂岩石块体识别的单元重构-聚合方法[J]. 岩石力学与工程学报，2012，31(3)：507-523.(ZHANG Yuting，XIAO Ming，DING Xiuli，et al. identification method of complex rock blocks usingelement reconstruction and aggregation technioue[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(3)：507-523.(in Chinese))
[24]	SHI G H，GOODMAN R E. The key blocks of unrolled joint traces in developed maps of tunnel walls[J]. International Journal of Numerical Analytical Methods in Geomechanics，1989，13(2)：131-158.
[25]	邬爱清，周火明，任放. 岩体三维网络模拟技术及其在三峡工程中的应用[J]. 长江科学院院报，1998，15(6)：15-18.(WU Aiqing ZHOU Huoming，REN Fang. Research on 3D rock joint net work simulation techniques and its application to TGP[J]. Journal of Yangtze River Scientific Research Institute，1998，15(6)：15-18.(in Chinese))
[26]	卢波，陈剑平，王良奎. 基于三维网络模拟基础的复杂有限块体的自动搜索及其空间几何形态的判定[J]. 岩石力学与工程学报. 2002，21(8)：1 232-1 238.(LU Bo，CHEN Jianping，WANG Liangkui. Automatic seeking for complex finite rock block and judgment of its spatial geometrical shape based on 3D network modeling[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(8)：1 232- 1 238.(in Chinese))
[27]	王述红，穆檄江，张航，等. 岩体结构面精细化空间模型及块体失稳分析[J]. 东北大学学报：自然科学版，2012，33(8)：1 186- 1 189.(WANG Shuhong，MU Xijiang，ZHANG Hang，et al. Spatial modeling of refined structural plane of rockmass and block stability analysis[J]. Journal of Northeastern University：Natural Science，2012，33(8)：1 186-1 189.(in Chinese))
[28]	郑程程，贺鹏，王刚，等. 隧道裂隙岩体结构信息解译与危石垮塌空间展布规律研究[J]. 岩石力学与工程学报，2022，41(3)：515-532.(ZHENG Chengcheng，HE Peng，WANG Gang，et al. Structure information interpretation of fractured rock mass and spatial distribution law of dangerous rock collapse in tunnels[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(3)：515-532.(in Chinese))
[29]	刘才华，李育宗. 考虑横向抗剪效应的节理岩体全长黏结型锚杆锚固机制研究及进展[J]. 岩石力学与工程学报，2018，37(8)：1 856-1 872.(LIU Caihua，LI Yuzong. Research progress in bolting mechanism and theories of fully grouted bolts in jointed rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(8)：1 856-1 872.(in Chinese))
[30]	冷彪，仇文革，王刚，等. 数字图像处理在隧道工程地质分析中的应用研究[J]. 铁道标准设计，2013，(11)：77-81.(LENG Biao，QIU Wenge，WANG Gang，et al. Research on digital image processing technology used in geologica analysis of tunnel Engineering[J]. Railway standard design，2013，(11)：77-81.(in Chinese))
[31]	HE P，WANG G，XU F，et al. GPR-MCS model of reliability analysis of key blocks and its engineering application[J]. International Journal for Numerical and Analytical Methods in Geomechanic，2021，45(5)：1-17.
[32]	ZHENG C C，HE P，WANG G，et al. Analysis of progressive collapse disaster and its anchoring effectiveness in jointed rock tunnel[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2024，48(16)：3 876-3 908.
[33]	SADOVSKY M A. Natural lumpiness of rocks[J]. Reports of Academy of Sciences，1979，247(4)：829-832.