摘要
软岩强度低,且具有明显的蠕变特性,常给地下巷道的开挖和支护带来很大的困难.依据蠕变理论,运用有限元程序ANSYS对某软岩巷道开挖无支护以及开挖以后两种支护方案的巷周位移、应力分布、蠕应变区等结果进行了分析,结果表明软岩巷道开挖以后变形很大以及采用短细密锚杆支护方案较普通长锚杆支护更为合理.
Because of the poor strength and the typical creep character of the soft rock, it is difficult to excavate and support the underground excavation. The paper adopts FME program ANSYS to analyze the displacement of excavation, the distribution of stress and the creep-strain zones in the case of no supports and two different support types. The analysis results indicate that the deformation is large after excavating. It is more reasonable to adopt anchor pile shorter, finer and more dense to support excavation than any other support types.
出处
《青岛理工大学学报》
CAS
2006年第5期26-29,共4页
Journal of Qingdao University of Technology
关键词
软岩巷道
蠕应变
ANSYS
短细密支护
soft rock excavation,creep strain,ANSYS,shorter finer and more dense support
