Research On The Deformation Laws Of Freezing Inclined Shaft Crossing Water-rich Sand Stratum

It has important application value to study the deformation laws of freezing inclined shaft through water-rich sand stratum. Based on the freezing inclined shaft in Yuan Datan, it used theoretical analysis, numerical simulation and field measurement to study the deformation laws of freezing inclined shaft through water-rich sand stratum. The main conclusions follow:(1) Divided shaft into two cases: shallow and deep, used rock pillar method and M. M.Promojiyfakonov theory designed the, the main conclusions follow: when the shaft shallow,roadway 1m,floor 0.5m; when the shaft deep, the thickNess of freezing wall as follows : roof4.88 m, roadway 3.6m,floor 3.9m. And the results of numerical simulation proofed that the design method of thickNess of freezing shaft wall was reasonable.(2) With the increase of roof exposing distance the horizontal displacement of frozen shaft distribute as “vertical” arc-shaped and the vertical displacement distribution of frozen shaft turned into “horizontal” arc-shaped from banding distribution. Compared the field measurement and numerical simulation results we can kNow that when the strength frozen shaft meet the requirements and roof exposing distance is 20 m, not only can guarantee the security and stability of the frozen wall, but also reduce the construction cycle which can achieve the purpose of rapid construction.(3) The relationship of frozen shaft as follows: roof > 1/2 arch of right side > 1/2 arch of right side left and the rate of roof deflection is biggest.(4) The will increase from bottom to top when the shaft excavated, and when across the center the temperature decreased. Because the refreezing and Ventilation and construction the temperature of work face will increase first and then decreased.