Abstract: Taking freezing main inclined shaft on big cross section under construction in Gucheng Coalmine, Lu’an Group as the research object, the evolution of the frozen pressure and a large number of in-suit measured data have been obtained through the earth pressure cell during the construction process. And the freezing pressure evolution laws of the roof, floor and two sides during the construction process have been analyzed. Firstly, the freezing pressure changes showed obvious volatility in the course of construction，affected by freezing temperature, hydration heat and thawing time and so on. Secondly，the inclined shaft stress shows a general linear growth trend with the increase of buried depth, despite some differences of spatial distribution. Thirdly, after analyzing the measured and calculated value of earth pressure during the inclined shaft construction, the current design theory is observed to have shortcomings and needs improving. The findings have important reference and guiding value with data and and experience obtained for the inclined frozen wall and inclined shaft design and construction for the similar alluvium condition and freezing condition.

Key words: freezing pressure, frozen wall, in-suit measurement, alluvium, inclined shaft