不同围岩条件下锚杆肋间距与锚固力优化研究

doi:10.16285/j.rsm.2017.1415

›› 2018, Vol. 39 ›› Issue (4): 1263-1270.doi: 10.16285/j.rsm.2017.1415

不同围岩条件下锚杆肋间距与锚固力优化研究

赵象卓¹，张宏伟^{1, 2}，CAO Chen^{2, 3}，张明¹，张怀东¹，韩军^{1, 2}

1. 辽宁工程技术大学矿业学院，辽宁阜新 123000；2. 辽宁工程技术大学辽宁省煤炭资源安全开采与洁净利用工程研究中心，辽宁阜新 123000；3. 伍伦贡大学土木、采矿与环境学院，新南威尔士伍伦贡 2522

收稿日期:2017-07-06 出版日期:2018-04-11 发布日期:2018-06-06
通讯作者: 韩军，男，1980年生，博士，教授，博士生导师，主要从事岩层控制与矿井灾害防治方面的研究工作。E-mail: hanj_lntu@163.com E-mail:zhao_xiangzhuo@126.com
作者简介:赵象卓，男，1988年生，博士研究生，主要从事岩层控制与矿井灾害防治方面的研究工作。
基金资助:
辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助项目(No. LNTU15KF02)。

Optimisation of bolt rib spacing and anchoring force under different conditions of surrounding rock

ZHAO Xiang-zhuo¹, ZHANG Hong-wei^{1, 2}, CAO Chen ^{2, 3}, ZHANG Ming¹, ZHANG Huai-dong¹, HAN Jun^{1, 2}

1. College of Mining, Liaoning Technical University, Fuxin, Liaoning 123000, China; 2. Research Center of Coal Resources Safety Mining and Clean Utilization, Liaoning Technical University, Fuxin, Liaoning 123000, China; 3. School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, New South Wales 2522, Australia

Received:2017-07-06 Online:2018-04-11 Published:2018-06-06
Supported by:
This work was supported by the Research Center of Coal Resources Safety Mining and Clean Utilization (LNTU15KF02).

摘要/Abstract

关键词: 厚壁理论, 拉拔试验, 螺纹钢锚杆, 肋间距, 锚固性能

Abstract: This study investigated the relationship between bolt rib spacing and anchorage performance under different conditions of surrounding rock. Based on the thick-walled cylinder theory, pull-out tests were carried out on sinistral rebar bolt specimens with the spacing of 12, 24, 36, and 48 mm, which were anchored in the steel sleeves with wall thicknesses of 4.5 and 6.0 mm, respectively. Results of the drawing force, the displacement of drawing force more than 100 kN, the circumferential strain of the sleeves and energy dissipation were obtained. Experimental results show that the displacement of drawing force more than 100 kN, the circumferential strain and the energy dissipation value of the sleeve increase with increasing the rib spacing in different sleeves (different surrounding rock conditions), respectively. The pulling force of anchor rod is found to be the highest when the rib spacing is 24 mm. While with the same rib spacing, the stronger the surrounding rock is, the larger the pulling force is. The circumferential strain of the sleeve with a 4.5 mm thick wall is larger than that of 6.0 mm, which indicates that the effect of surrounding rock is significant on the deformation ability of bolts. Moreover, the anchorage performance can be improved by increasing the rib spacing under different surrounding rock conditions.

Key words: thick-walled cylinder theory, pull-out test, sinistral rebar bolt, rib spacing, anchorage performance

中图分类号:

TP 028.8

赵象卓，张宏伟，CAO Chen，张明，张怀东，韩军, . 不同围岩条件下锚杆肋间距与锚固力优化研究[J]. , 2018, 39(4): 1263-1270.

ZHAO Xiang-zhuo, ZHANG Hong-wei, CAO Chen , ZHANG Ming,. Optimisation of bolt rib spacing and anchoring force under different conditions of surrounding rock[J]. , 2018, 39(4): 1263-1270.

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不同围岩条件下锚杆肋间距与锚固力优化研究

Optimisation of bolt rib spacing and anchoring force under different conditions of surrounding rock

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