恒阻锚杆支护机理数值分析

唐春安; 陈峰; 孙晓明; 马天辉; 杜艳红

doi:10.11779/CJGE201812016

恒阻锚杆支护机理数值分析 English Version

1. 大连理工大学岩石破裂与失稳研究所,辽宁大连 116000;
2. 中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京 100083;
3. 辽宁工程技术大学力学与工程学院,辽宁阜新 123000

基金项目: 国家自然科学基金面上项目（41572249）; 国家重点基础研究发展计划项目（“973”）（2014CB047100）; 中国矿业大学（北京）深部岩土力学与地下工程国家重点实验室开放基金资助项目（SKLGDUEK1825）

详细信息

作者简介:
唐春安(1958- ),男,博士,教授,主要从事岩土体破裂过程数值分析与微震监测等方面的教学和科研工作。E-mail: tca@mail.neu.edu.cn。

中图分类号: TU45
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- 收稿日期: 2017-12-07
- 发布日期: 2018-12-24

Numerical analysis for support mechanism of constant-resistance bolts

1. Institute of Rock Instability and Seismicity Research, Dalian University of Technology, Dalian 116000, China;
2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China;
3. School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China;

摘要

摘要: 为了研究恒阻锚杆的拉伸力学性能,采用RFPA软件对恒阻锚杆进行拉伸数值试验,试验结果表明,恒阻锚杆拉伸断裂后塑性应变最大值是弹性应变最大值的12倍,并且在塑性变形过程中应力值在28.01~38.71 MPa范围内波动,且波动较为稳定,数值试验结果与何满潮院士室内试验结果吻合度较高,验证了数值试验方法的准确性和可靠性。以此为依据,进一步采用数值试验方法研究荷载作用下恒阻锚杆和围岩相互作用原理,分析锚固岩体的受力特征和变形破坏特征,并对比分析传统锚杆和恒阻锚杆的支护效果,通过对比分析可知,恒阻锚杆的支护效果优于传统锚杆,为易发生大变形破坏的软岩及冲击地压控制提供了有效途径。
- 支护机理 /
- 恒阻锚杆 /
- RFPA /
- 数值试验
Abstract: In order to study the tensile mechanical properties of constant-resistance bolts, the numerical simulation of the tensile strength of a constant-resistance bolt is carried out by using the RFPA software. The experimental results show that the maximum plastic strain is 12 times the maximum value of elastic strain after constant-resistance tensile fracture, and the stress value fluctuates in the range of 28.01~38.71 MPa during plastic deformation, and the fluctuation is stable. The results of numerical experiments are in good agreement with Academician He Manchao’s laboratory test results, which verifies the accuracy and reliability of the numerical test method. Based on this, the numerical method is used to study the interaction principle of the constant-resistance bolt and the surrounding rock under loading and to analyze the stress and deformation and failure characteristics of anchored rock mass. The support effects of the traditional and constant-resistance bolts are comparatively analyzed. It is shown by the test results that the support effect of the constant-resistance bolt is better than that of the traditional one, which provides an effective way to control the soft rock with large deformation damage and rock burst.
- support mechanism /
- constant-resistance bolt /
- RFPA /
- numerical experiment

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参考文献(26)

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恒阻锚杆支护机理数值分析 English Version

作者简介: 唐春安(1958- ),男,博士,教授,主要从事岩土体破裂过程数值分析与微震监测等方面的教学和科研工作。E-mail: tca@mail.neu.edu.cn。

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Numerical analysis for support mechanism of constant-resistance bolts

期刊类型引用(13)

其他类型引用(4)

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出版历程

目录

作者简介:
唐春安(1958- ),男,博士,教授,主要从事岩土体破裂过程数值分析与微震监测等方面的教学和科研工作。E-mail: tca@mail.neu.edu.cn。