锚杆预紧力对锚固岩体力学性能改善的试验研究

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

Download: PDF (17471 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Prestressed anchor rods exhibited effects on the mechanical properties of intact rock mass and fractured rock mass. Uniaxial compression tests of intact rock mass and direct shear tests of fractured rock mass were conducted under different pretension anchor rod support conditions. Additionally，the crack-changing characteristics inside the rock mass were revealed by acoustic emission. The results of uniaxial compression tests show that compared with unsupported rock mass，the changes in compressive strengths of intact rock mass exhibited unobvious under ultra-low and low pretension supporting conditions，while the compressive strengths were significantly improved by medium and high pretension supporting. The rock mass showed obvious single-inclined plane shear failure under no support and ultra-low to low pretension bolt support conditions. Specifically，as the pretension force of the anchor bolt increased，the failure mode of the anchor rock masses changed from shear failure to tension splitting failure. These failure characteristics aligned with the crack type characterized by the RA-AF value. The results of direct shear tests show that the pretension bolt could enhance the bearing performance of fractured rock mass. The shear strength of fractured rock mass increased with the increase in the pretension force of anchor bolts. The crack evolution mode of anchor fractured rock mass during shear loading was revealed through acoustic emission signal analysis. At the initial loading stage，the proportion of tensile cracks was close to that of shear cracks. As the progress of loading continued，the shear crack became dominant. This work could provide theoretical basis for studying the mechanism of active support and the design of anchor support.

Key words： rock mechanics anchored rock mass prestressed bolt mechanical response acoustic emission

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	HOU Gongyu
	SHAO Yaohua
	ZHANG Shiou
	ZHAO Tielin
	LIU Chunlei

Cite this article:

HOU Gongyu,SHAO Yaohua,ZHANG Shiou, et al. Experimental study on improvement of mechanical properties of anchored rock mass by bolt preload[J]. , 2025, 44(2): 261-275.

URL:

https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I2/261

[1]	康红普. 煤矿巷道支护与加固材料的发展及展望[J]. 煤炭科学技术，2021，49(4)：1-11.(KANG Hongpu. Development and prospects of support and reinforcement materials for coal mine roadways[J]. Coal Science and Technology，2021，49(4)：1-11.(in Chinese))
[2]	汪波，郭新新，何川，等. 当前我国高地应力隧道支护技术特点及发展趋势浅析[J]. 现代隧道技术，2018，55(5)：1-10.(WANG Bo，GUO Xinxin，HE Chuan，et al. Analysis on the characteristics and development trend of the support technology of high ground stress tunnel in China[J]. Modern Tunnelling Technology，2018，55(5)：1-10.(in Chinese))
[3]	康红普，姜铁明，高富强. 预应力在锚杆支护中的作用[J]. 煤炭学报，2007，32(7)：680-685.(KANG Hongpu，JIANG Tieming，GAO Fuqiang. Effect of pretensioned stress to rock bolting[J]. Journal of China Coal Society，2007，32(7)：680-685.(in Chinese))
[4]	汪波，喻炜，刘锦超，等. 交通/水工隧道中基于预应力锚固系统的及时主动支护理念及其技术实现[J]. 中国公路学报，2020，33(12)：118-129.(WANG Bo，YU Wei，LIU Jinchao，et al. Timely- active support theory and its application in transportation /hydraulic tunnels based on pre-stressed anchorage system[J]. China Journal of Highway and Transport，2020，33(12)：118-129.(in Chinese))
[5]	侯公羽，梁金平，李小瑞. 常规条件下巷道支护设计的原理与方法研究[J]. 岩石力学与工程学报，2022，41(4)：691-711.(HOU Gongyu，LIANG Jinping，LI Xiaorui. Research on principles and methods of roadway support design under conventional conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(4)：691-711.(in Chinese))
[6]	訾信，汪波，喻炜，等. 端部锚固锚杆预应力场分布特征研究[J]. 隧道建设：中英文，2023，43(10)：1 750-1 759.(ZI Xin，WANG Bo，YU Wei，et al. Distribution characteristics of prestressed field of end-anchored bolts[J]. Modern Tunneling and Technology，2023，43(10)：1 750-1 759.(in Chinese))
[7]	YU W，WANG B，ZI X，et al. Effect of prestressed anchorage system on mechanical behavior of squeezed soft rock in large deformation tunnel[J]. Tunnelling and Underground Space Technology，2023，131，https://doi.org/10.1016/j.tust.2022.104782.
[8]	王斌，宁勇，冯涛，等. 单轴压缩条件下锚杆影响脆性岩体破裂的细观机制[J]. 岩土工程学报，2018，40(9)：1 593-1 600. (WANG Bin，NING Yong，FENG Tao，et al. Meso-mechanism of rock failure influenced by bolt anchorage under uniaxial compression loading[J]. Chinese Journal of Geotechnical Engineering，2018，40(9)：1 593-1 600.(in Chinese))
[9]	王斌，宁勇，冯涛，等. 低应变率加载速度影响脆性岩体锚固效果的试验研究[J]. 煤炭学报，2019，44(9)：2 691-2 699. (WANG Bin，NING Yong，FENG Tao，et al. Experimental study on anchoring effect of brittle rock mass influenced by loading rates at low strain rate[J]. Journal of China Coal Society，2019，44(9)：2 691- 2 699.(in Chinese))
[10]	宋硕，任富强，常来山. 含预应力锚杆煤岩组合体破坏及声发射特征试验研究[J]. 岩土力学，2023，44(增1)：449-460.(SONG Shuo，REN Fu qiang，CHANG Laishan. Experimental investigation on the failure and acoustic emission characteristics of coal-rock combination with prestressed bolt[J]. Rock and Soil Mechanics，2023，44(Supp.1)：449-460.(in Chinese))
[11]	林健，石垚，孙志勇，等. 端部锚固锚杆预应力场分布特征的大型模型试验研究[J]. 岩石力学与工程学报，2016，35(11)： 2 237-2 247.(LIN Jian，SHI Yao，SUN Zhiyong，et al. Large scale model test on the distribution characteristics of the prestressed field of end-anchored bolts[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(11)：2 237-2 247.(in Chinese))
[12]	蒋宇静，张孙豪，栾恒杰，等. 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)： 1 301-1 315.(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，2024，43(6)：1 301- 1 315.(in Chinese))
[13]	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))
[14]	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.
[15]	ZHANG Y C，JIANG Y J，WANG Z，et al. Anchorage effect of bolt on echelon fractures：A comparison between energy-absorbing bolt and conventional rigid bolt[J]. Engineering Failure Analysis，2022，137：106256.
[16]	董陇军，张义涵，孙道元，等. 花岗岩破裂的声发射阶段特征及裂纹不稳定扩展状态识别[J]. 岩石力学与工程学报，2022，41(1)：120-131.(DONG Longju，ZHANG Yihan，SUN Daoyuan，et al. Stage characteristics of acoustic emission and identification of unstable crack state for granite fractures[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(1)：120-131.(in Chinese))
[17]	赵奎，杨道学，曾鹏，等. 单轴压缩条件下花岗岩声学信号频域特征分析[J]. 岩土工程学报，2020，42(12)：2 189-2 197.(ZHAO Kui，YANG Daoxue，ZENG Peng，et al. Frequency-domain characteristics of acoustic signals of granite under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering，2020，42(12)：2 189-2 197.(in Chinese))
[18]	邓龙传，李晓昭，吴云，等. 不同冷却方式对花岗岩力学损伤特征影响[J]. 煤炭学报，2021，46(增1)：187-199.(DENG Longchuan，LI Xiaozhao，WU Yun，et al. Mechanical damage characteristics of granite with different cooling methods[J]. Journal of China Coal Society，2021，46(Supp.1)：187-199.(in Chinese))
[19]	郑强强，徐颖，胡浩，等. 单轴荷载作用下砂岩的破裂与速度结构层析成像[J]. 岩土工程学报，2021，43(6)：1 069-1 077. (ZHENG Qiangqiang，XU Ying，HU Hao，et al. Fracture and tomography of velocity structures of sandstone under uniaxial loads[J]. Chinese Journal of Geotechnical Engineering，2021，43(6)：1 069-1 077.(in Chinese))
[20]	侯公羽，李小瑞，张振铎，等. 使用小型围岩试件模拟与再现巷道围岩开挖卸荷过程的试验系统[J]. 岩石力学与工程学报，2017，36(9)：2 136-2 145.(HOU Gongyu，LI Xiaorui，ZHANG Zhenduo，et al. Experimental system for simulating excavation unloading process of rock around roadway by using small cylindrical hollow specimen[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(9)：2 136-2 145.(in Chinese))
[21]	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 Caihu，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)).
[22]	王聚贤，梁鹏，张艳博，等. 基于声发射RA-AF值与kneedle算法的岩石拉剪破裂分类研究[J]. 岩石力学与工程学报，2024，43(增1)：3 267-3 279.(WANG Juxian，LIANG Peng，ZHANG Yanbo，et al. Research on classification of rock tensile-shear fracture based on acoustic emission RA-AF values and kneedle algorithm[J]. Chinese Journal of Rock Mechanics and Engineering，2024，43(Supp.1)： 3 267-3 279.(in Chinese))
[23]	ZHANG Z H，DENG J H. A new method for determining the crack classification criterion in acoustic emission parameter analysis[J]. International Journal of Rock Mechanics and Mining Sciences，2020，130：104323.