%0 Journal Article
%A LI Xue-mei
%A RONG Chuan-xin
%A CHENG Hua
%T Analysis of Coal Mine Shaft Lining with Fluid-solid Coupling Theory Based on Three-parameter Strength Criterion
%D 2016
%R 10.11988/ckyyb.20150610
%J Journal of Yangtze River Scientific Research Institute
%P 83-87
%V 33
%N 6
%X As porous medium, concretes of the shaft lining of coal mine are affected by underground water seepage flow. The three-parameter strength criterion and elastic-plastic theory are used to obtain the stress distribution of shaft lining in the elastic zone and plastic zone, and the analytical expression between the groundwater pressure <i>P</i><sub>0</sub> on shaft lining and the plastic zone radius<i> r<sub>p</sub>.</i> The results show that the ultimate bearing capacity of the shaft lining is the largest when seepage flow  is not considered, and the hoop stress <i>σ<sub>θ </sub></i>of the shaft lining is about 2.7 times of the uniaxial compressive strength of concrete cubes. However, when seepage flow  is considered, the ultimate hydraulic pressure that the shaft lining can bear gradually decreases with the increases of porosity <i>β,</i> and when <i>β</i> equals 0.2, the hoop stress of the shaft lining is about 2.4 times of the uniaxial compressive strength of concrete cubes. Therefore, seepage flow  has  significant influence  on the stress distribution of the shaft lining. Moreover, with the increase of hydraulic pressure, the radial stress <i>σ<sub>r</sub> </i>and the hoop stress<i> σ<sub>θ</sub> </i>of concrete in the elastic zone gradually increase, however, when the hydraulic pressure reaches or exceeds the limit pressure(corresponding to the plastic radius), the radial stress <i>σ<sub>r</sub> </i>and the hoop stress <i>σ<sub>θ</sub> </i>in this position remains unchanged. The results provide  theoretical reference for the structure design of shaft lining.<br/><br/>
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20150610