Stress Measurement and Analysis of Mine Freezing Inclined Shaft in Yuandatan Mine
GUO Peng
GUAN Hua-dong
DENG Xiao-peng
LUO Xiao-song
Abstract：The mine auxiliary inclined shaft in Yuandatan Mine had a net width of 5.5 m ,a net height of 4.55 m and the strata passed through were a pure sand bed. A vertical depth of the mine shaft freezing section started was at 16.12 m ,the vertical depth of the mine shaft freezing section ended was 85.17 m ,the total inclined freezing length was 611 m ,the inclined angle of the freezing section was 6° and a vertical freezing method with five rows of freezing boreholes was applied. The freezing section was divided into 15 segments and each segment averaged 40 m.During the construction of the mine in-clined shaft ,site measurement and analysis were conducted on the temperature of the freezing wall , pressure and mine shaft inner linear deformation. The results showed that hydration heat released from the mine shaft concrete linear building had obvious influences to the temperature of the mine shaft linear ,pressure and strain. After 70 ~ 80 days of the test and measuring elements buried in the mine shaft linear ,the pressure and strain of the roof ,sidewall and floor were in stable and the loading capacity of the freezing wall was completely lost. After 140 days ,the freezing wall was completely thawed.
Keywords：mine freezing inclined shaftstress measurementtemperature of mine shaft linerfreezing shaft wallstrain
Publication Date：2015-07-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 31-37 )