Study on Loading and Deformation Law of Mine Shaft Liner Under Freezing and Thawing Temperature Field

According to the problems of the mine shaft construction under the existed mine shaft liner condition in Maiduoshan Mine of Ningdong Area, the numeric al simulation method was applied to the study on the frozen swelling force of the freezing wall and the stressed deformation law of the mine shaft liner during the freeze thawing process of the Jurassic formation in the mine auxiliary shaft of Maiduoshan Mine in Ningdong Area.The radial stress and strain distribution and the circulated st ress and strain distribution law at the different feature point of the mine shaft liner were obtained under the cross function of the freezing and forced thawing.The results showed that the forced thawing could effectively control the displacement of the freezing soil around the mine shaft liner and could reduce the pressure on the soil arou nd the mine shaft liner.Therefore the frozen swelling pressure could be released and the target to effectively protect the mine shaft liner could be obtained.