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Numerical simulation of artificial ground freezing in a fluid-saturated rock mass with account for filtration and mechanical processes
Received:March 05, 2017  Revised:April 05, 2017  Click here to download the full text
Citation of this paper:Ivan A. Panteleev,Anastasiia A. Kostina,Oleg A. Plekhov,Lev Yu. Levin,2017.Numerical simulation of artificial ground freezing in a fluid-saturated rock mass with account for filtration and mechanical processes.Sciences in Cold and Arid Regions,9(4):363~377.
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Author NameAffiliationE-mail
Ivan A. Panteleev Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Sciences, Perm 614013, Russia  
Anastasiia A. Kostina Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Sciences, Perm 614013, Russia  
Oleg A. Plekhov Institute of Continuous Media Mechanics, Ural Branch of Russian Academy of Sciences, Perm 614013, Russia poa@icmm.ru 
Lev Yu. Levin Mining Institute, Ural Branch of Russian Academy of Sciences, Perm 614007, Russia  
基金项目:This work was supported by the Russian Science Foundation (Grant No. 17-11-01204).
 
Abstract:This study is devoted to the numerical simulation of the artificial ground freezing process in a fluid-saturated rock mass of the potassium salt deposit. A coupled model of nonstationary thermal conductivity, filtration and thermo-poroelasticity, which takes into account dependence of the physical properties on temperature and pressure, is proposed on the basis of the accepted hypotheses. The considered area is a cylinder with a depth of 256 meters and diameter of 26.5 meters and includes 13 layers with different thermophysical and filtration properties. Numerical simulation was carried out by the finite-element method. It has been shown that substantial ice wall formation occurs non-uniformly along the layers. This can be connected with geometry of the freezing wells and with difference in physical properties. The average width of the ice wall in each layer was calculated. It was demonstrated that two toroidal convective cells induced by thermogravitational convection were created from the very beginning of the freezing process. The effect of the constant seepage flow on the ice wall formation was investigated. It was shown that the presence of the slow flow lead to the delay in ice wall closure. In case of the flow with a velocity of more than 30 mm per day, closure of the ice wall was not observed at all in the foreseeable time.
keywords:artificial ground freezing  numerical simulation  thermogravitational convection  thermo-poroelasiticity
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