深埋高应力大断面井筒稳定性研究

Shaft Stability Study on High Geostress Large Section in Deep Mining

文章以某矿副井条件为工程背景,采用数值计算方法,分析了副井关键部位围岩的应力分布和位移分布规律。研究结果表明:随着深度的增加,水平位移的大体趋势是增大的;但在岩层分界处会出现奇异点,这种趋势在靠近井筒底部表现尤其明显;随着深度的增加,铅垂应力和剪应力在岩层分界处会出现奇异点;井筒关键部位应该加强支护,以限制围岩水平位移。

In order to provide theoretical guidance of auxiliary shaft support for a large-scale mine,taking auxiliary shaft condition as engineering background,the study uses numerical calculation to analyze the stress and disposition distribution law of surrounding rocks in the key areas.The results show that with the increasing depth,the bigger the horizontal disposition is;at the boundary of strata appear singular points and this tendency is more obvious in the vicinity of shaft bottom;with the increasing depth,the vertical stress and shear stress also have singular points at the boundary;therefore,the critical areas of shaft supporting should be reinforced to limit the horizontal disposition of surrounding rocks.