Pullout simulation on fully grouted rock bolts based 
on residual shear strength

GUO Jin-gang; LI Yao-hui; HE Fu-lian; CHEN Jian-hang; ZHAO Guang-ming; ZHANG Jun-wen

doi:10.16285/j.rsm.2021.0544

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Pullout simulation on fully grouted rock bolts based on residual shear strength

更新时间：2026-06-25

- Pullout simulation on fully grouted rock bolts based on residual shear strength
- Vol. 42, Issue 11, (2021)
- 作者机构：
  
  1. 中国矿业大学（北京）能源与矿业学院,北京,100083
  2. 晋能控股集团,山西,大同,037000
  3. 安徽理工大学矿山地下工程教育部工程研究中心,安徽,淮南,232001
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2021.0544
  CLC：
- Online First：12 November 2021，
  
  Published：2021
- 稿件说明：
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GUO Jin-gang, LI Yao-hui, HE Fu-lian, et al. Pullout simulation on fully grouted rock bolts based on residual shear strength[J]. 2021, 42(11).
DOI：

GUO Jin-gang, LI Yao-hui, HE Fu-lian, et al. Pullout simulation on fully grouted rock bolts based on residual shear strength[J]. 2021, 42(11). DOI： 10.16285/j.rsm.2021.0544.

摘要

采用数值模拟方法，研究了全长黏结锚杆支护的力学传递机制。基于锚杆与锚固剂接触面剪切失效行为，提出了一种考虑接触面残余剪切强度的黏结滑移模型，并将其嵌入到桩单元中。利用锚杆拉拔试验，验证了该黏结滑移模型及对应的数值模拟结果的准确性。基于验证后的数值模拟模型，研究了锚杆与锚固剂接触面残余剪切强度、剪切刚度系数和黏结长度对锚杆支护效果的影响。结果表明，接触面残余剪切强度对锚杆最大支护阻力及残余支护阻力有显著影响，是锚杆支护分析中不可忽略的因素。此外，随接触面剪切刚度系数增加，锚杆最大支护阻力明显增大，但其对锚杆残余支护阻力没有明显影响。

Abstract

Fully grouted rock bolts are widely used in mining and civil engineering. In this study

numerical simulation was adopted to study the loading transfer performance of fully grouted rock bolts. First

based on the shear failure behaviour of the interface between the bolt and grout

a bond-slip model considering the residual shear strength was developed. Then

it was incorporated into the structural elements of piles. After that

the experimental pulling tests of rock bolts were carried out to validate the accuracy of this bond-slip model and the corresponding numerical modelling results. Finally

the influence of the residual shear strength

the shear stiffness coefficient and the grouted length on the bolting performance was studied through the validated numerical model. The results showed that the interfacial residual shear strength had a significant effect on the maximum and residual bearing capacity of rock bolts

which cannot be neglected in the test. With the increasing of interfacial shear stiffness coefficient

the maximum bearing capacity of bolts remarkably increased

and meanwhile there is no observable effect on the residual bearing capacity of bolts.

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