Analysis of the structural integrity of a frozen wall during a mine shaft excavation using temperature monitoring data

This paper describes the results of temperature monitoring a frozen wall (FW) around skip shaft potash mine under construction. The data on measurements in control-thermal boreholes were used to parameterize mathematical model heat transfer, which allowed for reconstruction field throughout entire cooled and soil volume. resulting distribution FW zone greater than 1 year was determine strength properties calculate temporary change limiting value external lateral load an given thickness specified thermomechanical properties. obtained dependencies maximum can be optimize operation mode freezing station at ice holding stage (or passive freezing) increase energy efficiency system ensure structural integrity FW.