锚固洞室在顶爆作用下破坏形式及破坏过程研究

王光勇; 顾金才; 陈安敏; 徐景茂; 张向阳

doi:10.11779/CJGE201508004

锚固洞室在顶爆作用下破坏形式及破坏过程研究 English Version

1. 河南理工大学深部矿井建设重点学科开放实验室,河南焦作 454000;
2. 中国科学技术大学近代力学系,安徽合肥 230026;
3. 总参工程兵科研三所,河南洛阳 471023

基金项目: 河南省科技攻关计划项目（142102210433）; 河南省教育厅科学技术研究重点项目科技攻关计划（14A440003）; 深部矿井建设省级重点实验室开放基金项目（2014KF-05）

详细信息

作者简介:
王光勇(1977- ),男,副教授,硕士生导师,主要从事岩土工程动载试验方面的教学与研究工作。E-mail: wgy2003@ustc.edu.cn。

中图分类号: TU 457
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出版历程
- 收稿日期: 2014-09-11
- 发布日期: 2015-08-24

Failure modes and process of tunnels reinforced by rockbolts under top explosion

1. Opening Project of Key Laboratory of Deep Mine Construction,Henan Polytechnic University, Jiaozuo 454000, China;
2. Department of Modern Mechanics,University of Science and Technology of China, Hefei 230026, China;
3. The Third Research Institute of the Corps of Engineers,General Staff of PLA, Luoyang 471023, China

摘要

摘要: 利用抗爆模型试验和数值分析方法,研究锚固洞室在顶爆作用下的破坏形式及破坏过程。根据锚固洞室破坏模型试验,发现锚固洞室主要有：受拉破坏、剪切破坏、受压破坏和压剪破坏4种破坏形态。通过分析试验解剖图和应力波传播规律发现：爆炸应力波作用下,锚固洞室首先在拱顶锚固区发生“层裂”现象,在自由面附近有类似半椭圆拱岩石介质脱落;同时两侧容易形成“八”字型剪切裂纹,随着爆炸荷载强度增加,如果锚杆加固较弱会在洞顶产生局部坍塌,一旦锚杆加固较强就会发生从爆心至洞室整体坍塌。最后利用数值分析方法分析了洞室受力情况和塑性区发展过程,进一步探讨了锚固洞室在顶爆作用下破坏形式和破坏过程。
- 地下工程 /
- 爆炸应力波 /
- 锚固洞室 /
- 破坏形式 /
- 破坏过程 /
- 模型试验 /
- 数值分析
Abstract: Based on model tests and numerical analysis, failure modes and process under top explosion are studied. According to the results of the model tests, the tunnels reinforced by rockbolts under top explosion have four kinds of failure modes, that is tensile failure, shearing failure, compressive failure, compressive and shearing failure. By analyzing the experimental profile and the propagation rules of stress waves, when the stress waves reach the surface of the tunnel, spalling failure will appear, which may make similar half elliptical rock mass peel off. Both sides of the tunnel produce cracks easily. With the increase of blast load, if the anchor reinforcement strength is weak, local collapse will appear, and once the intensity of anchorage zone is large, it will lead to collapse of the tunnel from spandrel to explosion center. Finally, in accordance with the action process of stress waves, the stress distribution and the development process of plastic zone, failure modes and process are further discussed through numerical analysis.
- underground engineering /
- explosion stress wave /
- rockbolt-reinforced tunnel /
- failure mode /
- failure process /
- model test /
- numerical analysis

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