锚固方式对岩石节理宏细观剪切特性的影响及其机制研究

doi:10.13722/j.cnki.jrme.2023.0941

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摘要随着岩体工程规模的不断扩大和赋存环境的日趋复杂，岩石节理剪切滑移引起锚杆破断的现象日益突出。认清锚固节理的剪切特性及其抗剪机制对于岩体工程稳定性控制设计至关重要。通过开展锚固节理剪切试验与数值模拟，系统研究全锚和端锚2种方式对岩石节理宏细观剪切特性的影响及其机制。结果表明：全锚方式下锚固剂的存在会使锚杆迅速发挥其“销钉作用”，而端锚方式下在剪切位移超过钻孔与锚杆间的间隙后锚杆才开始发挥作用；在锚杆破断前，全锚方式相对于端锚方式的峰值剪切应力和破断剪切应力更大；相同剪切位移下相对于端锚，全锚条件下锚固节理的裂纹数量更多；全锚方式下裂纹集中在锚杆附近，尤其是锚杆与节理相交处，端锚方式下裂纹分布较为分散，在端头锚固处、锚杆与节理相交处以及垫片处均有分布；相同剪切位移条件下，全锚锚杆的剪切应力远大于端锚锚杆，但其轴向应力因受到锚固剂限制主要集中在节理面附近；端锚方式下锚杆轴向应力被充分调动，传递至垫片处后可有效增大节理的法向应力；端锚锚杆和全锚锚杆的变形范围均不断增大，但端锚锚杆的变形范围显著大于全锚锚杆。

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	蒋宇静1
	2
	3
	张孙豪1
	2
	栾恒杰1
	3
	左海峰3
	刘光饶3
	李博4
	李鑫鹏1

关键词 ：岩石力学, 岩石节理, 锚固方式, 宏细观剪切特性, 数值模拟

Abstract：With the continuous expansion of the scale of rock mass engineering and the increasing complexity of the occurrence environment，the phenomenon of rock joint shear slip causing rock bolt breakage is becoming more and more prominent. It is very important to recognize the shear characteristics and shear mechanism of bolted joints for the stability control design of rock mass engineering. In this paper，the effects of full anchor and end anchor modes on the macro and micro shear properties of rock joints and their mechanisms are systematically studied through shear tests and numerical simulation of anchored joints. The results show that the presence of anchoring agent can make the bolt play its“pin role”quickly in the full-anchor mode，while the bolt does not play its role until the shear displacement exceeds the gap between the borehole and the bolt in the end-anchor mode. Before the anchor rod fractures，the peak shear stress and breaking shear stress in the full-anchor mode are greater compared to the end-anchor mode. Under the same shear displacement，the number of cracks in the anchored joint is more in the full-anchor condition compared to the end-anchor condition. Under full anchoring method，the cracks are concentrated near the anchor rod，especially at the intersection of the anchor rod and the joint，while under end anchoring method，the cracks are distributed in the end bolted，the intersection of the anchor rod and the joint and the gasket. Under the same shear displacement condition，the shear stress of full-anchored bolt is much greater than that of end-anchored bolt，but its axial stress is mainly concentrated near the joint surface due to the restriction of anchoring agent. The axial stress of end-anchored bolt is fully mobilized and can effectively increase the normal stress of the joint after being transferred to the gasket. After the peak shear displacement，the deformation range of end-anchored bolt and full-anchored bolt increases continuously，but the deformation range of end-anchored bolt is significantly larger than that of full-anchored bolt.

Key words： rock mechanics rock joints bolted mode macro and micro view shear characteristics numerical simulation

引用本文:

蒋宇静1，2，3，张孙豪1，2，栾恒杰1，3，左海峰3，刘光饶3，李博4，李鑫鹏1. 锚固方式对岩石节理宏细观剪切特性的影响及其机制研究[J]. 岩石力学与工程学报, 2024, 43(6): 1301-1315.
JIANG Yujing1，2，3，ZHANG Sunhao1，2，LUAN Hengjie1，3，ZUO Haifeng3，LIU Guangrao3，LI Bo4，LI Xinpeng1. Study of the effect of anchorage modes on the macro and micro shear characteristics of rock joints and its mechanism. , 2024, 43(6): 1301-1315.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0941 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/I6/1301

[1]	LIU C H，LI Y Z. Analytical study of the mechanical behavior of fully grouted bolts in bedding rock slopes[J]. Rock Mechanics and Rock Engineering，2017，50(9)：2 413-2 423.
[2]	JIANG Y J，ZHANG S H，LUAN H J，et al. Numerical modelling of the performance of bolted rough joint subjected to shear load[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources，2022，8(5)：1-21.
[3]	LI W T，LI X M，MEI Y C，et al. A numerical simulation approach of energy-absorbing anchor bolts for rock engineering[J]. International Journal of Rock Mechanics and Mining Sciences，2022，158：105188.
[4]	余伟健，吴根水，刘海，等. 薄煤层开采软弱煤岩体巷道变形特征与稳定控制[J]. 煤炭学报，2018，43(10)：2 668-2 678.(YU Weijian，WU Genshui，LIU Hai，et al. Deformation characteristics and stability control of soft coal-rock mining roadway in thin coal seam[J]. Journal of China Coal Society，2018，43(10)：2 668-2 678.(in Chinese))
[6]	刘泉声，雷广峰，彭星新. 深部裂隙岩体锚固机制研究进展与思考[J]. 岩石力学与工程学报，2016，35(2)：312-332.(LIU Quansheng，LEI Guangfeng，PENG Xingxin. Advance and review on the anchoring mechanism in deep fractured rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(2)：312-332.(in Chinese))
[8]	WU X Z，JIANG Y J，LI B. Influence of joint roughness on the shear behaviour of fully encapsulated rock bolt[J]. Rock Mechanics and Rock Engineering，2018，51(3)：953-959.
[9]	刘爱卿，鞠文君. 预应力全长锚固锚杆抗剪作用分析[J]. 煤矿开采，2012，17(1)：45-48.(LIU Aiqing，JU Wenjun. Analysis of shear resisting action of full-length anchored bolt with pre-stress[J]. Coal Mining Technology，2012，17(1)：45-48.(in Chinese))
[11]	WANG C S，JIANG Y J，WANG G，et al. Experimental investigation on the shear behavior of the bolt-grout interface under CNL and CNS conditions considering realistic bolt profiles[J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources，2022，8(4)：111.
[12]	ZHANG C Q，CUI G J，DENG L，et al. Laboratory investigation on shear behaviors of bolt-grout interface subjected to constant normal stiffness[J]. Rock Mechanics and Rock Engineering，2020，53(3)：1 333-1 347.
[14]	ZHANG Y C，JIANG Y J，WANG Z，et al. Anchorage effect of bolt on en-echelon fractures：A comparison between energy-absorbing bolt and conventional rigid bolt[J]. Engineering Failure Analysis，2022，137：106256.
[16]	GRASSELLI G. 3D Behaviour of bolted rock joints： experimental and numerical study[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(1)：13-24.
[18]	LI L，HAGAN P C，SAYDAM S，et al. Parametric study of rockbolt shear behaviour by double shear test[J]. Rock Mechanics and Rock Engineering，2016，49(12)：4 787-4 797.
[5]	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))
[7]	蒋宇静，张孙豪，栾恒杰，等. 恒定法向刚度边界条件下锚固节理岩体剪切特性试验研究[J]. 岩石力学与工程学报，2021，40(4)：663-675.(JIANG Yujing，ZHANG Sunhao，LUAN Hengjie，et al. Experimental study on shear characteristics of bolted rock joints under constant normal stiffness boundary conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(4)：663-675.(in Chinese))
[13]	WANG G，ZHANG Y Z，JIANG Y J，et al. Shear behaviour and acoustic emission characteristics of bolted rock joints with different roughnesses[J]. Rock Mechanics and Rock Engineering，2018，51(6)：1 885-1 906.
[15]	ZHAO Z H，SUN W，CHEN S J，et al. Coupling model of jointed rock mass and rock bolt in offshore LPG underground storage[J]. Energy Science and Engineering，2019，8(5)：1 468-1 483.
[21]	SONG Z Y，YANG Z，ZHANG M，et al. Numerical characterization of sandstone’s mechanical responses under multi-level compressive differential cyclic loading(DCL)：A 3D particle-based numerical investigation[J]. Computers and Geotechnics，2023，154：105109.
[22]	TANG J Z，YANG S Q，ZHAO Y L，et al. Experimental and numerical modeling of the shear behavior of filled rough joints[J]. Computers and Geotechnics，2020，121：103479.
[24]	WU X Z，ZHENG H F，WANG G，et al. Effect of Joint roughness and infill thickness on shear characteristics of rock mass[J]. Advances in Civil Engineering，2022，2022：1-12.
[25]	宋洋，王贺平，许怀玉，等. 全长粘结锚杆锚浆-界面应力的分布规律[J]. 土木与环境工程学报(中英文)，2019，41(4)：44-50.(SONG Yang，WANG Heping，XU Huaiyu，et al. analysis of stress distribution patten along the anchor-slurry interface of full-length bond anchor[J]. Journal of Civil and Environmrntal Engineering，2019，41(4)：44-50.(in Chinese))
[27]	刘日成，尹乾，杨瀚清，等. 恒定法向刚度边界条件下三维粗糙节理面循环剪切力学特性[J]. 岩石力学与工程学报，2021，40(6)：1 092-1 109.(LIU Richeng，YIN Qian，YANG Hanqing，et al. Cyclic shear mechanical properties of 3D rough joint surfaces under constant normal stiffness(CNS)boundary conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(6)：1 092-1 109.(in Chinese))
[30]	腾俊洋，张宇宁，唐建新，等.锚固方式对节理岩体剪切性能影响试验研究[J]. 岩土力学，2017，38(8)：2 279-2 285.(TENG Junyang，ZHANG Yuning，TANG Jianxin，et al. Experimental study on shear behavior of jointed rock mass wissssth anchorage mode[J]. Rock and Soil Mechanics，2017，38(8)：2 279-2 285.(in Chinese))
[31]	JIANG Y J，XIAO J，TANABASHI Y，et al. Development of an automated servo-controlled direct shear apparatus applying a constant normal stiffness condition[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(2)：275-286.
[33]	蒋宇静，张孙豪，栾恒杰，等. 循环载荷对岩石节理宏细观剪切特性影响的模拟研究[J]. 煤炭学报，2023，48(1)：199-211.(JIANG Yujing，ZHANG Sunhao，LUAN Hengjie，et al. Numerical investigation on the effect of cyclic loading on macro-meso shear characteristics of rock joints[J]. Journal of China Coal Society，2023，48(1)：199-211.(in Chinese))
[34]	SINGH P O，SPEARING A J S，JESSU K. Analysis of the combined load behaviour of rock bolt installed across discontinuity and its modelling using FLAC3D[J]. Geotechnical and Geological Engineering，2020，38(6)：5 867-5 883.
[10]	JIANG Y J，LI X P，LIU J K，et al. Study on shear behavior and failure characteristics of bolted anisotropic rock joints[J]. Materials，2023，16(6)：2 210.
[17]	JALALIFAR H S，AZIZ N，HADI M. The effect of surface profile，rock strength and pretension load on bending behaviour of fully grouted bolts[J]. Geotechnical and Geological Engineering，2006，24(5)：1 203-1 227.
[19]	蒋宇静，张孙豪，栾恒杰，等. 剪切载荷作用下岩体结构面动态接触特征数值模拟[J]. 煤炭学报，2022，47(1)：233-245.(JIANG Yujing，ZHANG Sunhao，LUAN Hengjie，et al. Numerical simulation on the 3D surface dynamic contact characteristics of rock discontinuity subject to shear loading[J]. Journal of China Coal Society，2022，47(1)：233-245.(in Chinese))
[26]	王刚，袁康，蒋宇静，等. 剪切荷载下岩体结构面-浆体-锚杆相互作用机制宏细观研究[J]. 中南大学学报：自然科学版，2015，46(6)：2 207-2 215.(WANG Gang，YUAN Kang，JIANG Yujing，et al. Macro-micro mechanical on joint-grout-bolt interaction in rockmass subjected to shear loading[J]. Journal of Central South University：Science and Technology，2015，46(6)：2 207-2 215.(in Chinese))
[28]	GRINDHEIM B，LI C，HØIEN A. Full-scale pullout tests of rock anchors in a limestone quarry focusing on bond failure at the anchor-grout and grout-rock interfaces[J]. Journal of Rock Mechanics and Geotechnical Engineering，2023，15(9)：2 264-2 279.
[35]	JIANG Y J，ZHANG S H，LUAN H J，et al. Study on the effect of rock strength on the macro-meso shear behaviors of artificial rock joints[J]. Geofluids，2022，2022：1-15.
[37]	王刚，袁康，蒋宇静，等. 基于颗粒离散元法的锚固节理剪切行为宏细观研究[J]. 煤炭学报，2014，39(12)：2 381-2 389.(WANG Gang，YUAN Kang，JIANG Yujing，et al. Macro-micro mechanical study on bolted joint subjected to shear loading based on DEM[J]. Journal of China Coal Society，2014，39(12)：2 381-2 389.(in Chinese))
[20]	李博，朱强，张丰收，等. 基于矿物晶体模型的非均质性岩石双裂纹扩展规律研究[J]. 岩石力学与工程学报，2021，40(6)：1 119-1 131.(LI Bo，ZHU Qiang，ZHANG Fengshou，et al. Study on crack propagation of heterogeneous rocks with double flaws based on grain based model[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(6)：1 119-1 131.(in Chinese))
[23]	SAADAT M，TAHERI A. A numerical study to investigate the influence of surface roughness and boundary condition on the shear behaviour of rock joints[J]. Bulletin of Engineering Geology and the Environment，2020，79(5)：2 483-2 498.
[29]	康红普，崔千里，胡滨，等. 树脂锚杆锚固性能及影响因素分析[J]. 煤炭学报，2014，39(1)：1-10.(KANG Hongpu，CUI Qianli，HU Bin，et al. Analysis on anchorage performances and affecting factors of resin bolts [J]. Journal of China Coal Society，2014，39(1)：1-10.(in Chinese))
[32]	CHEN N，ZHANG X B，JIANG Q H，et al. Shear behavior of rough rock joints reinforced by bolts[J]. International Journal of Geomechanics，2018，18(1)：4017130.
[36]	袁康，蒋宇静，初振云，等. 基于颗粒离散元法的岩体结构面锚固机制细观研究[J]. 山东科技大学学报：自然科学版，2014，33(6)：76-84.(YUAN Kang，JIANG Yujing，CHU Zhenyun，et al. Microscopic Research on anchorage mechanism of bolted rock joint based on DEM[J]. Journal of Shandong University of Science and Technology：Natural Science，2014，33(6)：76-84.(in Chinese))