The Law Of Freeze And Mandatory Thaw In The Cretaceous Aquifer Soft Rock Strata

In this paper, we use laboratory test,theoretical analysis, numerical analysis and field measurement as aresearch tool,to make a more in-depth,systematic study in the theory and the application of the ground freezing and mandatory thawing in the Cretaceous aqueous soft rock.We studied the thermophysical properties and frozen soil mechanics of the Cretaceous stratum, when the temperature ranged from-5℃to-15℃, created a mathematical model of the temperature field in each stage. We also established the corresponding thermal governing equations. Based on a model we established to calculate the freezing and thawing temperature field in the shaft, we studied the process and the laws of the formation and the forced thawing process of the frozen wall. Every factors effecting the freezing and thawing temperature field and the significance of them. were studied.. We carried on multivariate regression analysis on freezing and forced thawing temperature field. We analysed the temperature field in the interaction of the freeze and mandatory thaw, freeze wall by the force of the frost heave, and the borehole wall deformation law. We also studied the temperature field under a single freeze and freeze-thaw interaction, frost heaving of the freeze wall and the changes of the borehole wall by the force-deformation. A research of freeze information construction technology on Cretaceous strata is based on freeze and mandatory thaw engineering of lingdon coal mine.