采矿与安全工程学报2015，Vol.32Issue(4)：597-602,609,7.DOI:10.13545/j.cnki.jmse.2015.04.012
流变条件下锚杆应力分布规律
Stress distribution of bolt based on rheological conditions
康继春 1卜庆为2
作者信息
- 1. 河南理工大学能源科学与工程学院,河南 焦作 454000
- 2. 内蒙古科技大学矿业与煤炭学院,内蒙古 包头 014010
- 折叠
摘要
Abstract
In order to explore the stress distribution of bolt based on rheological conditions, at first, the visco-elastic plastic displacement solution of circular roadway under the condition of visco-elastoplastic model has been obtained, and then the expressions of bolt shear and axial stress of full-length anchoring bolt have been deduced by using "neutral point" theory. According to the site surrounding rock dis-placement data, four parameters value in visco-elastoplastic model has been derived reversely. The re-sults show that the position of neutral point has nothing to do with time. When the rock is in the decel-erating creep stage, the rate of increasing stress of bolt decreases and reduces to zero gradually. When the rock is in the steady creep stage, the rate of increasing stress of bolt decreases and reduces to a fixed value with the passage of time. This paper has provided a new way to verify whether the bolt is failure or not in roadway service life and to confirm secondary support time.关键词
流变/西原模型/中性点/巷道变形/锚杆应力分布Key words
rheological/visco-elastoplastic model/neutral point/roadway deformation/stress distribution of bolt分类
矿业与冶金引用本文复制引用
康继春,卜庆为..流变条件下锚杆应力分布规律[J].采矿与安全工程学报,2015,32(4):597-602,609,7.
