结构面表面起伏体对抗剪强度的贡献与影响研究

doi:10.13722/j.cnki.jrme.2023.1001

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Abstract To analyze the mechanical response of surface asperities under different shear stress conditions，the UDEC software was employed to simulate and analyze the mechanical behavior and wear characteristics of 17 groups of rock joints with various sawtooth asperities under varying normal stresses. The findings were validated through laboratory tests. The results show that the effects of the attached sawtooth number and the sawtooth height ratio on the peak shear strength of rock joints initially show a positive correlation，but the correlation weakens after reaching a certain level，and are also affected by normal stress conditions. The increase of normal stress will weaken the contribution of the attached sawtooth number and the sawtooth height ratio to the improvement of shear dilation of rock joints. The joint roughness coefficient(JRC) calculation method considering only the maximum undulating asperity is only applicable under low normal stress conditions. It is also observed that there are four main failure types in direct shear tests for the rock joints with various sawtooth asperities. By conducting response surface analysis，a JRC calculation model for the sawtooth rock joints was derived with an error of less than 10% compared to experimental results. This study reveals the mechanical responses of rock joints with various sawtooth asperities，providing a comparative reference for engineering practice and further exploration of using asperity amplitude in characterizing rock joint roughness.

Key words： rock mechanics sawtooth rock joints surface asperities shear characteristics joint roughness coefficient numerical simulation

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	TIAN Qianqian1
	YONG Rui2
	ZHONG Zhen2
	CAO Zemin1
	AN Pengju2

Cite this article:

TIAN Qianqian1,YONG Rui2,ZHONG Zhen2, et al. Study on the contribution and influence of surface asperities of rock discontinuities on shear strength[J]. , 2024, 43(S2): 3771-3778.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.1001 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/IS2/3771

[12]	VALLIER F，MITANI Y，BOULON M，et al. A shear model accounting scale effect in rock joints behavior[J]. Rock Mechanics and Rock Engineering，2010，43(5)：581-595.
[13]	ASADI M S，RASOULI V，BARLA G. A bonded particle model simulation of shear strength and asperity degradation for rough rock fractures[J]. Rock Mechanics and Rock Engineering，2012，45(5)：649-675.
[14]	ASADI M S，RASOULI V，BARLA G. A laboratory shear cell used for simulation of shear strength and asperity degradation of rough rock fractures[J]. Rock Mechanics and Rock Engineering，2013，46(4)：683-699.
[15]	BAHAADDINI M，HAGAN P C，MITRA R，et al. Scale effect on the shear behaviour of rock joints based on a numerical study[J]. Engineering Geology，2014，181：212-223.
[16]	乐慧琳，吴继敏，高晓兵，等. 尺寸效应对锯齿状结构面抗剪强度影响[J]. 辽宁工程技术大学学报：自然科学版，2016，35(7)：745-750.(LE Huilin，WU Jimin，GAO Xiaobing，et al. Influence of size effect on shearing strength of zig-zag structure plane[J]. Journal of Liaoning Technical University：Natural Science，2016，35(7)：745-750.(in Chinese))
[17]	PRATOMO F Y，WEI X，LI Y，et al. Application of the four-dimensional lattice spring model in direct shear testing of intact rock[C]// The 11th Asian Rock Mechanics Symposium. IOP Conference Series：Earth and Environmental Science，2021，861(3)：1-11.
[18]	TAN X，REN Y，LI T，et al. In-situ direct shear test and numerical simulation of slate structural planes with thick muddy interlayer along bedding slope[J]. International Journal of Rock Mechanics and Mining Sciences，2021，143：1-12.
[19]	JIANG Y，LI B，YAMASHITA Y. Simulation of cracking near a large underground cavern in a discontinuous rock mass using the expanded distinct element method[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(1)：97-106.
[20]	ITASCA Consulting Group，Inc. UDEC and 3DEC manual[R]. [S. l.]：ITASCA Consulting Group，Inc.，2008.
[21]	赵延林，万文，王卫军，等. 随机形貌岩石节理剪切数值模拟和非线性剪胀模型[J]. 岩石力学与工程学报，2013，32(8)：1 666-1 676. (ZHAO Yanlin，WAN Wen，WANG Weijun，et al. Shear numerical simulation of random morphology rock joint and nonlinear shear dilatancy model[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(8)：1 666-1 676.(in Chinese))
[22]	OH J，LI Y，MITRA R，et al. A numerical study on dilation of a saw-toothed rock joint under direct shear[J]. Rock Mechanics and Rock Engineering，2017，50(4)：913-925.
[23]	杜时贵，陈禹，樊良本. JRC修正直边法的数学表达[J]. 工程地质学报，1996，4(2)：36-43.(DU Shigui，CHEN Yu，FAN Liangben. Mathematical expression of JRC modified straight edge[J]. Journal of Engineering Geology，1996，4(2)：36-43.(in Chinese))
[24]	BARTON N R，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics，1977，10(1)：1-54.
[1]	HONG R，JIAN W，ZHANG D，et al. Experimental study on damage and degradation of structure plane in rock mass under cyclic shear load[J]. Geofluids，2022，2022：1-11.
[25]	黄曼. 岩石模型结构面的相似材料研制及力学可靠性研究[硕士学位论文][D]. 杭州：浙江大学，2012.(HUANG Man. Similar mateiuals developed and mechanical reliability study on model rock structural plane[M. S. Thesis][D]. Hangzhou：Zhejiang University，2012.(in Chinese))
[2]	刘新荣，王 ?，许彬，等. 消落带劣化下含锯齿状结构面岩质边坡动力响应机制研究[J]. 岩石力学与工程学报，2022，41(12)：2 377-2 388.(LIU Xinrong，WANG Yan，XU Bin，et al. Investigation on dynamic response mechanism of slopes with serrated structural planes under degradation of rock mass in hydro-fluctuation belt[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(12)：2 377-2 388.(in Chinese))
[26]	MURALHA J，GRASSELLI G，TATONE B，et al. ISRM suggested method for laboratory determination of the shear strength of rock joints：revised version[J]. Rock Mechanics and Rock Engineering，2014，47(1)：291-302.
[3]	沈明荣，张清照. 规则齿型结构面剪切特性的模型试验研究[J]. 岩石力学与工程学报，2010，29(4)：713-719.(SHEN Mingrong，ZHANG Qingzhao. Experimental study of shear deformation characteristics of rock mass discontinuities[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：713-719.(in Chinese))
[27]	陈祖煜. 岩质边坡稳定分析：原理•方法•程序[M]. 北京：中国水利水电出版社，2005：219-224.(CHEN Zuyu. Rock slope stability analysis— theory，methods and programs[M]. Beijing：China Water Power Press，2005：219-224.(in Chinese))
[4]	YANG Z Y，CHIANG D Y. An experimental study on the progressive shear behavior of rock joints with tooth-shaped asperities[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37(8)：1 247-1 259.
[5]	PRATOMO F Y，WEI X，ZOU C，et al. Investigation of the shear failure of rock joints using the four-dimensional lattice spring model[J]. International Journal of Rock Mechanics and Mining Sciences，2022，152：105070.
[28]	ALEJANO L R，MURALHA J，ULUSAY R，et al. ISRM suggested method for determining the basic friction angle of planar rock surfaces by means of tilt tests[J]. Rock Mechanics and Rock Engineering，2018，51(12)：3 853-3 859.
[6]	周辉，程广坦，朱勇，等. 大理岩规则齿形结构面剪切特性试验研究[J]. 岩土力学，2019，40(3)：852-860.(ZHOU Hui，CHENG Guangtan，ZHU Yong，et al. Experimental study of shear deformation characteristics of marble dentate joints[J]. Rock and Soil Mechanics，2019，40(3)：852-860.(in Chinese))
[7]	BAHAADDINI M，HAGAN P C，MITRA R，et al. Experimental and numerical study of asperity degradation in the direct shear test[J]. Engineering Geology，2016，204：41-52.
[8]	HABERFIELD C M，JOHNSTON I W. A mechanistically-based model for rough rock joints[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1994，31(4)：279-292.
[9]	朱小明，李海波，刘博，等. 含一阶和二阶起伏体节理剪切强度的试验研究[J]. 岩石力学与工程学报，2011，30(9)：1 810-1 818. (ZHU Xiaoming，LI Haibo，LIU Bo，et al. Experimental study of shear strength of joints with first-order and second-order asperities[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(9)：1 810-1 818.(in Chinese))
[10]	刘新荣，许彬，黄俊辉，等. 多形态贯通型岩体结构面宏细观剪切力学行为研究[J]. 岩土工程学报，2021，43(3)：406-415.(LIU Xinrong，XU Bin，HUANG Junhui，et al. Macro-meso shear mechanical behaviors of coalescent rock joints with different morphologies[J]. Chinese Journal of Geotechnical Engineering，2021，43(3)：406-415.(in Chinese))
[11]	刘新荣，邓志云，刘永权，等. 峰前循环剪切作用下岩石节理损伤特征与剪切特性试验研究[J]. 岩石力学与工程学报，2018，37(12)：2 664-2 675.(LIU Xinrong，DENG Zhirong，LIU Yongquan，et al. An experimental study on the cumulative damage and shear properties of rock joints under pre-peak cyclic shear loading[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(12)：2 664-2 675.(in Chinese))