不良岩体巷道的湿喷混凝土支护技术  

Drift support technology with wet shotcrete method in weak rock mass

作　　者：韩斌[1] 王贤来[2] 文有道[2] 

机构地区：[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

出　　处：《中南大学学报（自然科学版）》2010年第6期2381-2385,共5页Journal of Central South University:Science and Technology

基　　金：国家"十一五"科技支撑计划项目(2006BAB02A01);教育部新世纪优秀人才支持计划项目(NECT-07-0070);国家自然科学基金资助项目(50774011)

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。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 with the same material,intension of wet shotcrete can be 45%-85% higher than that of dry shotcrete averagely,which significantly strengthens support capacity and can meet the requirement of support on mess rock.Wet shotcrete ＋ resin blot support method replaces traditional dry shotcrete ＋ mesh ＋ bolt support method,and this tunnel support method has unique advantage in supporting weak rockmass.

关 键 词：湿喷混凝土 不良岩体 支护方案 

分 类 号：TD353[矿业工程—矿井建设]