数值模拟软岩巷道支护技术研究

Study on simulation technology for soft rock tunnels

软岩巷道多具有高应力、变形大、难支护等工程特征,单一支护方式难以控制围岩变形.通过对围岩变形机理、破坏过程分析研究,利用模拟围岩变形破坏的RFPA计算软件,建立了数值计算力学模型.对软岩巷道围岩变形破坏、应力转移过程进行模拟分析,为软岩巷道支护方案设计提供了依据.

Soft rock tunnels have the characteristics of high ground pressure and large deformation and are difficult to be supported.So they can not be easily controlled with single support method.By studying the deformation mechanism and damage procedure of the enclosing rocks,a numerical calculation mechanical model has been created by utilizing RFPA software,which can be used to simulate the deformation and damage of enclosing rocks.The simulation analysis on deformation and damage of soft rock tunnel and the transfer procedure of terrestrial stress can be scientific bases for the design of tunnel support.