scholarly journals Numerical simulation of cement grouting of saturated soil during a mine shaft sinking using the artificial ground freezing

2020 ◽  
Vol 28 ◽  
pp. 693-701
Author(s):  
M. Zhelnin ◽  
A. Kostina ◽  
O. Plekhov ◽  
L. Levin
Keyword(s):  
Numerical Simulation ◽  
Saturated Soil ◽  
Mine Shaft ◽  
Cement Grouting ◽  
Ground Freezing ◽  
Shaft Sinking ◽  
Artificial Ground Freezing

scholarly journals Numerical simulation of vertical shaft sinking using artificial ground freezing

2021 ◽  
Vol 266 ◽  
pp. 03008
Author(s):  
M.S. Zhelnin ◽  
A.A. Kostina ◽  
O.A. Plekhov ◽  
L.Y. Levin
Keyword(s):  
Numerical Simulation ◽  
Soil Freezing ◽  
Design Parameters ◽  
Freezing Process ◽  
Vertical Shaft ◽  
Ground Freezing ◽  
Shaft Sinking ◽  
Artificial Ground Freezing ◽  
Ice Content ◽  
Fully Coupled

Artificial ground freezing (AGF) is used worldwide for vertical shaft sinking in difficult hydrogeological conditions. The modern tendency is to determine the design parameters of the freezing technique based on numerical simulation. This work is devoted to the numerical simulation of the formation of an ice-soil wall in the soil stratum due to the AGF and shaft sinking under the protection of the wall. For this purpose, a fully coupled thermo-hydro-mechanical model of soil freezing has been developed on the basis of the theory of poromechanics. The developed model considers important features of the freezing process, such as the phase change, pore water migration due to cryogenic suction, frost heave, and consolidation of the soil. The results have shown that the model allows to predict the distribution of ice content, assess stress and strain in the ice-soil wall, and estimate displacement of the excavation wall.

scholarly journals Optimization Directions for Monitoring of Ground Freezing Process for Grzegorz Shaft Sinking

2021 ◽  
Author(s):  
Paweł Kamiński
Keyword(s):  
Rock Mass ◽  
Freezing Process ◽  
Mine Shaft ◽  
Freezing Method ◽  
Ground Freezing ◽  
Starting Point ◽  
Shaft Sinking ◽  
High Level ◽  
Geophysical Measurements

Grzegorz shaft is the first mine shaft sunk in 21st century in Silesian Coal Basin in USA of ground freezing method. Work carried out by Shaft Sinking Company (PBSz S.A.) is characterized by high level of innovativeness. Geophysical measurements were conducted to find directions of optimization of ground freezing process and its monitoring. Data gathered during research is a starting point for finding directions of optimization of particular fields during Grzegorz shaft sinking, as well as to be used in future similar ventures. Proposed solutions might have bring real improvements for safety and effectiveness of work and also for economic factors. Conducted tests and analysis aim at improvement of monitoring of shape, size and quality of frozen rock mass column in a safe and reliable manner.

scholarly journals Numerical simulation of freezing pipe deformation during artificial ground freezing

2019 ◽  
Vol 18 ◽  
pp. 293-300 ◽  
Author(s):  
A. Kostina ◽  
M. Zhelnin ◽  
O. Plekhov ◽  
I. Panteleev ◽  
L. Levin
Keyword(s):  
Numerical Simulation ◽  
Ground Freezing ◽  
Artificial Ground Freezing
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