Research on Development Laws of Freezing Wall Temperature Field in a Mine Auxiliary Shaft

In order to study the temperature field development laws of multi-loop tube freezing wall, the development laws of frozen wall temperature field were studied by measured data and FLAC^3D software numerical simulation in a mine auxiliary shaft, the simulation results are compared with the measured data. The research results show that measured values from measure temperature hole and simulated values have the same trend of development, all of them decrease logarithmically with the freezing time and show a step shape at the freezing point, eventually become stable; the measured values of the average temperature and the effective thickness of the frozen wall are in agreement with simulated values, the effective thickness of the frozen wall increases obviously after the joint circle of the middle circle hole, the temperature field curve of the main interface is approximate V-shape at the freezing tube, the temperature of the main interface gradually decreases with the freezing time.