| 高应力软岩巷道预应力桁架锚索支护技术 |
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| 引用本文： | 罗立强,王卫军,余伟健,吴海,张永青,屈延嗣.高应力软岩巷道预应力桁架锚索支护技术[J].湖南科技大学学报(自然科学版),2012,27(1):17-22. |
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| 作者姓名： | 罗立强 王卫军 余伟健 吴海 张永青 屈延嗣 |
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| 作者单位： | 湖南科技大学能源与安全工程学院,湖南湘潭,411201 |
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| 基金项目： | 国家自然科学基金资助项目(51074071,51104063);湖南科技大学研究生创新基金资助项目(S110104) |
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| 摘 要： | 曲江矿212风巷属于深部高应力软岩巷道,原有的"锚索+锚杆+梯子梁+金属网"联合支护并没有从根本上解决大变形问题.通过数值模拟与实践经验,在原有支护的基础上分析了巷道破坏的原因并提出了预应力桁架锚索支护方案.实践表明:预应力桁架锚索与传统锚杆、锚索相比具有抗剪强度高和有效加固两帮减少顶板下沉等优点,能减小塑性区范围,提高围岩的稳定性.
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| 关 键 词： | 高应力软岩 预应力桁架锚索 巷道破坏原因 数值分析 |
Prestressed truss anchor support technology on high- stress soft rock roadway |
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| LUO Li-qiang
,
WANG Wei-jun
,
YU Wei-jian
,
WU Hai
,
ZHANG Yong-qing
,
QU Yan-si.Prestressed truss anchor support technology on high- stress soft rock roadway[J].Journal of Hunan University of Science & Technology(Natural Science Editon),2012,27(1):17-22. |
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| Authors: | LUO Li-qiang WANG Wei-jun YU Wei-jian WU Hai ZHANG Yong-qing QU Yan-si |
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| Institution: | (School of Energy and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China) |
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| Abstract: | The wind lane of Qujiang mine is deep high-stress soft rock roadway,the original joint supporting——"Anchor + bolt + beam +Metal mesh" was not fundamentally solved the problem of large deformation.Through numerical simulation and practical experience,the scheme of prestressed truss anchor support was proposed based on the original joint supporting and the reasons were analysed for the roadway damage.Practice proved that compared to the conventional bolt,cable,the prestressed truss anchor support has advantages of high shear strength and reinforces the surrounding rock to reduce the roof subsidence,and it reduces the damage to the surrounding rock on a large extent,improves the stability of surrounding rock. |
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| Keywords: | high stress soft rock prestressed truss anchor reasons of the roadway damage numerical analysis |
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