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| 返修大断面硐室加固及数值模拟研究 | |
| 引用本文： | 韦四江,马建宏,李小军.返修大断面硐室加固及数值模拟研究[J].采矿与安全工程学报,2009,26(2). |
| 作者姓名： | 韦四江 马建宏 李小军 |
| 作者单位： | 1. 河南理工大学,能源科学与工程学院,河南,焦作,454000 2. 河南理工大学科学技术处,河南,焦作,454000 3. 河南理工大学研究生处,河南,焦作,454000 |
| 基金项目： | 河南省教育厅自然科学研究项目 |
| 摘 要： | 在分析硐室围岩岩性、软弱围岩流变、复杂应力环境及原支护结构失稳的基础上,结合软岩巷道围岩控制理论,提出了以全长锚固锚杆、锚索增强国岩整体性和自承载能力的主动支护,并以底板锚注加底拱返修加固.采用FLAC3D软件对原支护方案和返修加固方案进行了数值模拟,结果表明:修复加固后,最大主应力峰值外移,塑性区范围减小,围岩承载能力增强,两帮移近量41.4 mm,顶板移近量22.1 mm,底鼓量6.45 mm,支护受力合理.现场工业试验表明:经过50～90 d的矿压观测,硐室变形量小于20 mm,变形速率小于0.5 mm/d,修复加固取得了成功. |
| 关 键 词： | 大断面硐室 返修 加目 数值模拟 |
Reinforcement of Repaired Large Section Chamber and Numerical Simulation |
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| WEI Si-jiang,MA Jian-hong,LI Xiao-jun.Reinforcement of Repaired Large Section Chamber and Numerical Simulation[J].Journal of Mining and Safety Engineering,2009,26(2). | |
| Authors: | WEI Si-jiang MA Jian-hong LI Xiao-jun |
| Affiliation: | 1.School of Energy Science and Engineering;Henan Polytechnic University;Jiaozuo;Henan 454000;China;2.Office of Science and Technology;3.Office of Graduates;China |
| Abstract: | Considering the theory of roadway support in soft rock, we proposed an active support mode based on study of rheology of weak adjacent rock,complex stress environment,and destabilization of original supports.Fully grouted bolt,extension grouted cable that can strengthen self-bearing capacity and entirety are used.Original support scheme and reinforcement scheme are simulated by means of FLAC3D.Calculation results show that peaks of the maximum principal stresses move toward the surface of chamber after rein... |
| Keywords: | large section chamber repair strengthening numerical simulation |
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