采矿与安全工程学报2016，Vol.33Issue(4)：655-661,7.DOI:10.13545/j.cnki.jmse.2016.04.014
厚表土斜井冻结凿井期井壁混凝土应变实测研究
Study on concrete strain of inclined shaft lining in deep alluvium during freezing sinking period
摘要
Abstract
For the purpose of studying the safety of inclined shaft lining in the period of freezing sink-ing, variations of concrete strain and steel stress of shaft lining have been carried out based on in-situ measurement of main inclined shaft in Hami Large South Lake mine. The structure safety of shaft lining has been discussed by taking ultimate concrete tensile and compressive strain into account, besides which, several optimized suggestions have been put forward. The result has shown that variations of concrete strain could include four periods: disordered period, accelerated increasing period, slow in-creasing period and stable period, and the valid concrete strain should be taken into account after disor-dered stage. The design of inclined shaft lining should mainly be controlled by concrete tensile strain. During the construction of main inclined shaft of Hami Large South Lake mine, the maximum hoop tensile strain of floor has been up to 1 280με, which is considerably greater than the ultimate tensile strain value, and the maximum hoop tensile strain of circular section has exceeded 200με with the shaft lining facing the conditions of fracturing.关键词
斜井/冻结法凿井/井壁/现场实测/混凝土应变Key words
inclined shaft/freezing sinking/shaft lining/in-situ measurement/concrete strain分类
矿业与冶金引用本文复制引用
王千星,杨维好,王衍森..厚表土斜井冻结凿井期井壁混凝土应变实测研究[J].采矿与安全工程学报,2016,33(4):655-661,7.基金项目
国家高技术研究发展计划(863)项目(2012AA06A401) （863）
