| 软弱岩层中大断面硐室施工与支护技术研究 |
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| 引用本文： | 韩立军,王延宁,周胜利,董亚宁.软弱岩层中大断面硐室施工与支护技术研究[J].金属矿山,2006(11):23-26. |
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| 作者姓名： | 韩立军 王延宁 周胜利 董亚宁 |
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| 作者单位： | 1. 中国矿业大学
2. 马鞍山钢铁集团姑山矿业有限公司 |
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| 摘 要： | 针对姑山铁矿和睦山矿区-300m水平井底车场中央变电所硐室围岩具有松散、软弱和破碎的特点，以软岩巷道支护理论为基础，提出了大断面硐室合理的支护结构与施工方法，简要分析了实现硐室稳定的支护机理，提出初次支护采用锚网喷与低预应力锚索支护，而二次支护采用锚注全断面支护，形成复合锚固支护结构，给出了硐室结构的具体支护参数和施工工艺。应用和现场监测结果表明，由初次锚网喷与锚索和二次锚注组成的复合支护结构满足了软岩地层中大断面硐室的支护要求，取得较好的技术与经济效果。
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| 关 键 词： | 软岩 大断面硐室 锚注支护 预应力锚索 二次支护 |
| 收稿时间： | 2006-09-17 |
| 修稿时间： | 2006年9月17日 |
Investigation on Construction and Support Technology for Large Profile Underground Chamber in Weak Rock Stratum |
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| Han Lijun,Wang Yanning,Zhou Shengli,Dong yaning.Investigation on Construction and Support Technology for Large Profile Underground Chamber in Weak Rock Stratum[J].Metal Mine,2006(11):23-26. |
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| Authors: | Han Lijun Wang Yanning Zhou Shengli Dong yaning |
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| Abstract: | The rational support structure and construction method for large profile underground chamber were proposed based on the theory of support for openings in soft rock stratum. Based on the analysis of the support mechanism for realizing the stability of underground chamber, it was suggested to use bolting net-grouting and low pre-stressed anchor cable for the primary support and the full profile support by bolting-injection for the secondary support so as to form a composite bolting support structure. The specific support parameters of the chamber structure and the construction process were also given. The application and site monitoring show that such a composite support structure can meet the requirements for supporting the large profile underground chamber in soft rock stratum and can achieve both good technical and economic benefits. |
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| Keywords: | Large profile underground chamber Support by bolting and injection Pre-stressed anchor cable Secondary support |
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