不良岩体巷道的湿喷混凝土支护技术.pdf

第 41 卷第 6 期 中南大学学报( 自然科学版) Vol.41 No.6 2010 年 12 月 Journal of Central South University (Science and Technology) Dec. 2010 不良岩体巷道的湿喷混凝土支护技术 1 2 2 韩斌 ，王贤来 ，文有道 (1. 北京科技大学 土木与环境工程学院，北京，100083； 2. 中南大学 资源与安全工程学院，湖南 长沙，410083) 摘 要：通过分析传统支护理论与实践存在的不足，提出湿喷混凝土在不良岩体巷道支护中的支撑作用、充填与 隔离作用以及应力转化作用；根据具体的工程背景，应用 Barton 的 Q 岩体分级及支护方法，提出采用湿喷混凝 土＋树脂锚杆的支护方案。研究结果表明：该支护方案实现了对不良岩体巷道的有效支护；湿喷混凝土直接成本 与干喷混凝土直接成本近似相等，相同材料的湿喷混凝土平均强度比干喷混凝的平均强度高 45%~85% ，实现了 对不良岩体巷道的支护需要；湿喷混凝土＋树脂锚杆支护技术可替代传统的干喷混凝土＋钢网＋锚杆工艺，对不 良岩体的支护具有独特优势。 关键词：湿喷混凝土；不良岩体；支护方案 中图分类号：TD353 文献标志码：A 文章编号：1672−7207(2010)06−2381−05 Drift support technology with wet shotcrete method in weak rock mass 1 2 2 HAN Bin , WANG Xian-lai , WEN You-dao (1. School of Civil Environment Engineering, University of Science Technology Beijing, Beijing 100083, China; 2. School of Resources and Safety Engineering, Central South University, Changsha 410083, China) Abstract: Through analysising the shortcomings of traditional draft support theory and practice, the support, paste and isolation and stress transform actions of wet shotcrete for weak rock condition were put forward based on engineering background, and support method of shotcrete with resin bolt by applying Q system was put forward. The results show that the support method plan realizes effective support for weak ground tunnels, and cost comparison of wet shotcrete and dry shotcrete shows that the cost is nearly equal, but