冻结立井井壁早期温度应力计算研究  

Calculation of the Early Thermal Stress in Freezing Vertical Shaft Lining

作　　者：管华栋 周晓敏 徐衍 徐国栋 Guan Huadong;Zhou Xiaomin;Xu Yan;Xu Guodong(School of Civil and Resource Engineering, University of Science and Technology Beijing,Beijing 100083, China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083

出　　处：《金属矿山》2018年第5期44-47,共4页Metal Mine

基　　金：国家自然科学基金面上项目(编号:51678048);国家重点研发计划项目(编号:2016YFC0600803)

摘　　要：介绍了冻结井筒井壁温度应力研究现状,分析了井壁早期温度应力的产生机理;基于热弹性理论,建立了矿山冻结立井井壁早期温度应力计算模型,推导了井壁早期温度应力和应变计算公式;通过算例分析,环向和竖向温度应力以及环向温度应变与温度变化分布相关,环向温度拉应力最大达到27.62 MPa,最大环向温度拉应变为196με,说明井壁设计不能忽略温度应力的影响。The research status of thermal stress in freezing shaft lining is presented and the generating mechanism of the early thermal stress in shaft lining is analyzed. Based on the theory of thermal elasticity,the calculation model of early thermal stress in the mine shaft is established,and the calculation formula of thermal stress and strain of shaft lining is deduced.According to an engineering analysis,the circumferential and vertical thermal stress and the circumferential thermal strain are related to the distribution of temperature variation. The maximum circumferential thermal stress is 27.62 MPa,and the maximum circumferential thermal strain is 196 με. It is indicated that thermal stress can＇t be ignored in the design of shaft lining.

关 键 词：温度应力 大体积混凝土 井壁 冻结立井 解析推导 

分 类 号：TD262[矿业工程—矿井建设]