Analysis of Earth Heat Infiltration in Artificial Ground Freezing
M. A. Semin, L. Yu. Levin, A. V. Pugin
Mining Institute, Ural Branch, Perm, 614007 Russia
Keywords: Ледопородное ограждение, шахтный ствол, искусственное замораживание, задача Стефана, земные теплопритоки, теплопритоки от окружающих пород, численное моделирование, Frozen wall, mine shaft, artificial freezing, Stefan problem, earth heat infiltration, surrounding rock heat infiltration, numerical modeling
Abstract
The authors have analyzed relative earth heat infiltration in artificial ground freezing in the context of formation of frozen wall in mine shafts. The artificial ground freezing modeling reveals considerable dependence of the earth heat infiltration on the thermal properties of ground, process variables of freezing plant and time. The earth heat infiltration comes to a steady-state value 5-8 months after beginning of freezing. The formula is obtained for estimation of the steady-state value for the relative earth heat infiltration at different temperatures of ground and freezing brine.
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