基于井壁监测信息的竖向附加力反演及井壁破坏分析  

Back analysis of vertical additional force on shaft lining based on monitoring information and its failure analysis

作　　者：张黎明[1] 王在泉[1] 卢则阳[1] 李华峰[1] 

机构地区：[1]青岛理工大学理学院,山东青岛266033

出　　处：《煤炭学报》2009年第5期619-623,共5页Journal of China Coal Society

基　　金：建设部科技计划基金资助项目(02-5-04)

摘　　要：提出基于监测信息的应变优化反分析荷载的方法,即以井壁应变监测信息为依据,将竖向附加力作为设计变量建立分析模型,不断改变设计参数,使计算值与监测结果逐步逼近,从而反演作用在井壁不稳定地层段上的竖向附加力,最后依据所设模型的反演参数编写优化文件.在得到附加力基础上对井壁进行数值分析,结果表明,施加4 a附加力后井壁内侧开始进入塑性,塑性区最早出现在表土与基岩交界面附近;经过10.4 a后,在基岩交界面附近出现周圈裂缝,井壁发生破坏.The method of back analysis of load on shaft wall based on monitoring information was put forward. Based on monitoring information of shaft lining, the vertical additional force was defined as a design variable in the model. The design paramaters were changed according to allowable error. Then the numerical analysis of shaft wall was carried out. After applying the additional load, it shows that inside shaft wall is in plastic property four years later. The plastic zone appears firstly on the interface between the soil and the bedrock. The cracks take place around the interface after ten years. The stress inside shaft wall is larger than allowable stress of concrete, and the shaft lining fails.

关 键 词：监测信息 竖向附加力 井壁破坏 正反分析 

分 类 号：TD262.11[矿业工程—矿井建设]