关键词: 冻结壁, 冻胀应力, 井壁, 温度

Abstract: Abstract:Freezing method is often used in the construction of deep alluvial mine, but the accumulation and release of frost-heave pressure in freezing process often endangers the safety of outer shaft liner and freezing pipes, and even causes engineering accidents. Based on the physical model experiment, this paper studies the distribution of the temperature field on the inside of the shaft lining and the inside of the ice wall, as well as the characteristics and distribution characteristics of the frozen expansion stress inside the ice wall. The results show that the frost-heave pressure of the soil body after freezing the wall cross-circle has a significant extrusion effect on the soil body near the shaft liner, the frost-heave pressure near the main freezing pipes circle is large, and the frost-heave pressure on the inside of the ice wall is greatly affected by the ice wall of the main freezing pipes circle.