新奥法巷道开挖监控及最佳二次支护时间的研究  

Study on laneway excavation monitoring and best secondary support time with new austrian tunnelling method

作　　者：苗胜军[1] 王洋 李培良[3] 任奋华[1] 

机构地区：[1]北京科技大学土木与环境工程学院 [2]北京科力安监测技术有限公司 [3]国家安全生产监督管理总局信息研究院

出　　处：《黄金》2008年第3期24-28,共5页Gold

基　　金：国家自然科学基金重大项目(50074002)

摘　　要：新奥法巷道工程的核心内容是通过围岩变形的监测与分析检验围岩是否稳定及支护是否合理。针对工程开挖阶段,地质资料完整,但监测数据不足的特点,采用数值模拟方法,研究了开挖工作面推进与支护施工过程中巷道围岩变形规律,以围岩变形曲线为研究对象,讨论了开挖施工对巷道围岩的影响范围及不同开挖方式下的开挖面空间效应问题,并确定了最佳二次支护时间。The key of new austrian tunnelling method is to test whether the wall rock is stable and the support is reasonable by monitoring and analyzing the deformation of wall rock. With complete geologic information but short monitoring data, the paper analyzed the relationship between the advance of excavation surface and the deformation of laneway wall rock with numerical simulation method. With the wall rock deformation curve as subject investigated, the influence circle of wall rock by excavation and spatial effect with different excavation methods had been reviewed. Best secondary support time was also determined.

关 键 词：新奥法 巷道 监控 数值模拟 变形 二次支护 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]