摘要
在真三轴试验台上,通过对模型加围压至设计值后开挖巷道,并利用气压支护试验装置在巷道内施加均布压力来模拟支护阻力,真实再现深部巷道开挖与支护过程中围岩的演化过程。应用先进的数字图像采集和相关分析技术对巷道围岩位移场进行量测与分析,探寻不同支护阻力与深部巷道围岩稳定关系,为确保深部巷道工程的稳定提供理论与技术依据。
The complete process of excavation,deformation and supporting of a deep tunnel was simulated with three physical models of the tunnel performed with a true triaxial test. During the experiment,the tunnel was excavated after a certain confining pressure was exerted on each model,and the supporting device of air bag was created to provide support pressure for the tunnel. The techniques of digital picture deformation measurement were applied to the processes of high definition color pictures of the model,through the displacement field of the rock surrounding,the tunnel could be obtained. Based on the analysis of the displacement field,the relation of support pressure and stability of the surrounding rock mass in deep tunnels was achieved,which would provide the theoretical and technical basis for stabilizing the deep tunnels.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第S2期4032-4036,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金重大项目(50490273)
国家自然科学基金面上项目(50674083)
教育部重点科技项目(106085)
关键词
采矿工程
支护阻力
深部巷道
稳定性
物理模型
数字照相变形量测
mining engineering
support pressure
deep tunnel
stability
physical model
digital picture deformation measurement
