立井井壁附加应变长期实测研究  

An In-situ Long Period Observation of Additional Strain in Shaft Linings

作　　者：梁恒昌[1] 周国庆[1] 刘志强[1] 周金生[1] 赵光思[1] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室建筑工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2009年第6期794-799,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金重点项目(50534040);中国矿业大学青年基金项目(2007A007);中国矿业大学科技基金项目(2006B003)

摘　　要：对华东地区十多个立井井筒6～9a的井壁附加应变进行了实测和研究，获取多个井筒的实测附加应变演变规律并进行了分类处理，在对附加应变进行拟合的基础上分析了几种典型附加应变曲线的特点，分析了不同类型曲线中竖直附加力和温度应力对井壁破裂的贡献．结果表明：温度可造成竖向温度应变27×10^-6～88×10^-6幅度的波动，可以认为是井壁固有的恒定交替变化的应力，本身并不会造成井壁的破坏，但会加剧或缩短井壁破坏进程；竖直附加力增长率在0．015×10^-60．068×10^-6d-1之间，随时间逐步增大的竖直附加力造成井壁破坏．The evolution of additional strain in a shaft lining was obtained by automatic monitoring in a mine of more than ten shaft linings over a period of more than six years. The meas- ured strain was fitted to several typical curves. The results show that the vertical strain increa- ses at rates from 0. 015×10^-6d-1 to 0. 068×10^-6 d-1. The value of the temperature strain wave increased from 27×10^-6 to 88 ×10^-6. The characteristic interaction between the shaft lining and the surrounding soil was obtained. Thermal stress is inherent. It can not induce rup- ture of the lining but it can accelerate the rupture process. Gradually increasing additional stress is the essential reason for lining rupture.

关 键 词：实测研究 立井井壁 附加应变 竖直附加力 温度 

分 类 号：TD265.32[矿业工程—矿井建设]