Analysis on Numerical Calculation of Forced Thaw Applied to Freezing Shaft Wall of Hetaoyu Mine Auxiliary Shaft
ZHANG Xue-feng
Abstract：A freezing depth of Hetaoyu Mine Auxiliary Shaft was 955m.When the mine shaft reached at the shaft bottom ,forced thaw measures could be conducted in consideration in order to eliminate the freezing shaft wall in a short period and to have a backfill grouting and a grouting between the shaft liners.At present ,there was no precedent of the forced thaw conducted for a completed mine freezing shaft wall in China and there was no calculation formula directly applied to the forced thaw calculation of the mine freezing shaft wall.According to the certain condition of the mine shaft ,a numerical calcu-lation model of the forced thaw for the freezing wall of the mine shaft was established and a calculation analysis was conducted.The results showed that the forced thaw of the mine freezing shaft wall would be expanded from the central area of the freezing tube to the two sides ,the internal side of the freezing wall would be firstly thawed and the external side of the freezing wall would be thawed finally.An in-stalled power of the heating equipment required for the thaw of the completed mine freezing shaft wall would be 13 350kW ,two sets of a 7t coal-fired hot water boiler would be required to be installed and the forced thaw of the mine freezing shaft wall would be completed about two months.
Keywords：mine shaftfreezing shaft wallforced thawnumerical calculationtemperature field
Publication Date：2014-02-22
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 38-41,26 )