摘要
为保障深厚表土层中冻结法凿井的冻结壁和竖井井壁(简称两壁)在施工和生产中的安全和可靠性,基于深厚表土层中井壁破裂灾害的机理,探讨两壁的力学模型和方程,用解析分析的方法,对井壁三维应力σ_z,σ_t,σ_r的求值及其在强度理论中的位置进行研究。结果表明,表土段井壁要承受自重和竖直附加力,这是深厚表土段井壁发生破裂灾害的主要原因,也是与岩石段井壁受力的根本区别,因而在深厚表土段"两壁"需按三维空间进行设计;必须把竖向应力σ_z和环向应力σ_t分别作为控制因素进行设计计算和核算。为减小竖直附加力,在井深大于200 m时,井壁结构设计宜采用井壁竖向可缩装置。
In order to ensure the safety and reliability of the freezing wall and mine shaft liner in the freezing shaft sinking in deep thick o- verburden during the mine shaft construction and mine production,based on the mechanism of the mine shaft liner cracking disaster in the deep thick overburden,the paper discussed the mechanics model and equation of the freezing wall and mine shaft liner.With the analytic analysis method,the paper had a research on the evaluations of the three dimension stressσ_z,σ_(?)andσ_r ...
出处
《煤炭科学技术》
CAS
北大核心
2008年第10期17-21,共5页
Coal Science and Technology
关键词
深厚表土中井壁
冻结壁
圆筒的三维应力状态
井壁竖直附加力
井壁竖向可缩装置
mine shaft liner in deep thick overburden
freezing wall
cylinder three dimension stress status
vertical additional force of mine shaft liner
vertical yield device of mine shaft liner
