Abstract: In order to thoroughly study the stress and deformation of the wall of well，in-situ measurements on stress and strain of Yuncheng mine in freezing sinking process in Yuncheng was made, which won the variable rule in concrete strain of Yuncheng main shaft outer wall   By contrasting with the allowed or limited strain of concrete， the security of outer wall is predicted.The analysis showed：the tangential strain in outer wall of Yuncheng is large but much less than the limits of high-strength concrete compressive strain   The maximum vertical tensile strain is large but the main strength of concrete has fully grown，so the main shaft side wall is safe.Freeze

Key words: sinking, Outer shaft wall, Concrete strain, In-situ measurement