[1] LIU Xiaohu, YANG Yong, YAO Zhishu, ZHA Wenhua, et al. Influence of surface rib parameters of bolts on anchoring performance and optimization [J]. Journal of Southeast University (English Edition), 2026, 42 (1): 100-111. [doi:10.3969/j.issn.1003-7985.2026.01.010]

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Influence of surface rib parameters of bolts on anchoring performance and optimization()

锚杆表面肋参数对锚固性能影响及优化

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

42

Issue:

2026 1

Page:

100-111

Research Field:

Other Disciplines

Publishing date:

2026-03-20

Info

Title:

Influence of surface rib parameters of bolts on anchoring performance and optimization

锚杆表面肋参数对锚固性能影响及优化

Author(s):

LIU Xiaohu^1,2,3, YANG Yong¹, YAO Zhishu¹, ZHA Wenhua^2,4, XI Yanqi^2,4, WANG Jiaqi¹

1.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China
2.State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
3.Engineering Research Center of Underground Mine Construction of Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China
4.School of Civil Engineering and Architecture, East China University of Technology, Nanchang 330013, China

刘小虎^1,2,3, 杨勇¹, 姚直书¹, 查文华^2,4, 习燕琪^2,4, 王佳奇¹

1.安徽理工大学土木建筑学院, 淮南 232001
2.东华理工大学核资源与环境国家重点实验室, 南昌 330013
3.安徽理工大学矿山地下工程教育部工程研究中心, 淮南 232001
4.东华理工大学土木与建筑工程学院, 南昌 330013

Keywords:

geotechnical engineering;  anchorage support;  anchorage interface;  resin anchoring agent;  surface rib parameters;  anchorage performance optimization

岩土工程;  锚固支护;  锚固界面;  树脂锚固剂;  表面肋参数;  锚固性能优化

PACS:

TD32

DOI:

10.3969/j.issn.1003-7985.2026.01.010

Abstract:

Deep coal mining rock support structures using rock bolts face complex geological conditions such as high ground temperatures and groundwater. Rock mass deformation and failure caused by bolt failure frequently occur, making it crucial to enhance the anchoring performance of rock bolts. First, the stress state of the anchor rod under axial loading across five stages of any anchored segment is analyzed. The shear stress patterns at the anchoring interface during different stages are elucidated. A refined mechanical model of the anchoring interface incorporating surface rib parameters is established. A failure criterion for the anchoring interface under the influence of ground temperature or groundwater is derived and validated. Second, the influence of anchor rib parameters on anchoring force is abalyzed, and in-situ shear tests are conducted. Results indicate that increasing the rib angle and optimizing rib spacing can enhance anchoring force. To minimize the shear component of axial force at the anchor interface, the rib angle of the anchor bolt should not be less than 70°. When the anchor grout possesses high inherent strength, the spacing between ribs on the anchor bolt surface may be increased (to 24 mm or greater). Finally, methods for enhancing the anchoring performance of bolts in deep complex strata are proposed, providing technical references for the safe and efficient support of tunnel rock masses in similar geological conditions.

煤炭深部开采围岩锚杆支护结构面临高地温、地下水等复杂地质条件的影响,失锚导致的围岩变形破坏时有发生,因此提升锚杆锚固性能非常重要。首先,分析锚杆受轴向荷载作用时任意锚固段5个阶段的应力状态,阐明不同阶段锚固界面切应力形式,建立锚杆表面肋参数细化的锚固界面力学模型,推导出考虑地温或地下水影响的锚固界面破坏判定式并进行验证;其次,进行锚杆表面肋参数对锚固力影响因素分析与界面直剪试验,得出锚杆肋角度增加及合理的肋间距可增加锚固力。为减少轴力在锚固界面上的剪切分力,锚杆肋面角不应小于70°,若锚固剂自身强度高可增加锚杆表面肋间距(可取24 mm以上)。最后,提出深部复杂地层锚杆锚固性能提升方法,为类似地层巷道围岩安全高效支护提供技术参考。

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Memo

Memo:

Received: 2025-03-17; Revised: 2025-06-07.
Biography: LIU Xiaohu (1986—), male, doctor, lecturer, 2020134@aust.com.cn.
Foundation items: The Natural Science Research Project of Anhui Educational Committee (No.2022AH050814), Open Fund of State Key Laboratory of Nuclear Resources and Environment (East China University of Technology) (No.2022NRE07), the National Natural Science Foundation of China (No.51964002, 52174104), Open Fund of Engineering Research Center of Underground Mine Construction of Ministry of Education (No.JYBGCZX2022105).
Citation: LIU Xiaohu, YANG Yong, YAO Zhishu, et al. Influence of surface rib parameters of bolts on anchoring performance and optimization[J]. Journal of Southeast University (English Edition), 2026, 42(1): 100-111. DOI: 10. 3969/j. issn. 1003-7985. 2026. 01. 010.

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