Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Lev Levin"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-18 (2024)
Abstract The paper explores the 3D stationary vortex structure of turbulent airflow near the dead-end face of a blind heading, ventilated via a forcing ventilation system. Despite its significance in blind heading ventilation, previous studies primar
Externí odkaz:
https://doaj.org/article/ca78de9bfb66483dbcb165464a786217
Publikováno v:
Frattura ed Integrità Strutturale, Vol 18, Iss 69, Pp 106-114 (2024)
The article describes the results of laboratory studies on the unfrozen water content and ultimate long-term strength of frozen clay and chalk samples in the temperature range from -10 to -25 �C. The soil samples contained dissolved salt in the por
Externí odkaz:
https://doaj.org/article/18caee699c054dc89f77b510fd9eb72a
Publikováno v:
Applied Sciences, Vol 14, Iss 15, p 6840 (2024)
Effective fire prevention in mine workings and tunnels requires a thorough theoretical analysis of the heat and mass transfer processes within these structures. This involves using established models to calculate non-isothermal air flow dynamics in l
Externí odkaz:
https://doaj.org/article/c2b85ed57f7d41adb7e94ab0de087ef5
Publikováno v:
Cleaner Engineering and Technology, Vol 18, Iss , Pp 100710- (2024)
Artificial ground freezing during mine shaft construction is a costly endeavor. For effective decision-making in mining operations, it's essential to establish robust control over frozen soil conditions. This control holds paramount importance for en
Externí odkaz:
https://doaj.org/article/c122dc55889742e38b44f8e05eb70112
Publikováno v:
Frattura ed Integrità Strutturale, Vol 17, Iss 63, Pp 1-12 (2023)
The construction of shafts of potash mines in flooded and unstable soils is usually carried out with the help of artificial ground freezing. The freezing process aims to form a waterproof frozen wall (FW) around the shaft and is monitored throughout
Externí odkaz:
https://doaj.org/article/b9e69e5663ce4ded88f278ac98d2f70d
Publikováno v:
Applied Sciences, Vol 13, Iss 18, p 10016 (2023)
This paper examines the impact of salinity on the thermophysical properties of soils during artificial freezing. It focuses on analyzing heat and mass transfer in saline soils for constructing a frozen wall around a mineshaft at a potash salt deposit
Externí odkaz:
https://doaj.org/article/579190be57c8433d8d41d720b4c32af8
Publikováno v:
Frattura ed Integrità Strutturale, Vol 17, Iss 63 (2022)
This paper describes the results of the temperature monitoring of a frozen wall (FW) around the skip shaft of a potash mine under construction. The data on temperature measurements in control-thermal boreholes were used to parameterize the mathematic
Externí odkaz:
https://doaj.org/article/3b0723028e074a76b0fc1e134734d597
Autor:
Mikhail Semin, Lev Levin
Publikováno v:
Mathematics, Vol 11, Iss 4, p 989 (2023)
The calculation of air distribution in large mine ventilation networks is usually carried out by numerically solving a system of equations representing Kirchhoff’s circuit laws. This formulation of the problem traditionally only considers the frict
Externí odkaz:
https://doaj.org/article/d8ba700cee1343309b04a038853be812
Autor:
Mikhail Semin, Lev Levin
Publikováno v:
Fluids, Vol 7, Iss 9, p 298 (2022)
This paper considers the problem of thermal convection of a calcium chloride solution in a vertical borehole. A non-uniform temperature distribution with a given vertical gradient is set at the walls of the borehole. The non-stationary temperature di
Externí odkaz:
https://doaj.org/article/e8ddf825c6ae44dea28466bacae3d3cf
Autor:
Mikhail Semin, Lev Levin
Publikováno v:
Frattura ed Integrità Strutturale, Vol 13, Iss 49, Pp 167-176 (2019)
Artificial ground freezing (AGF) is a common technology of shaft sinking through water-bearing strata. The AGF technique is used to create a frozen wall preventing shaft flooding. An additional factor that makes shaft sinking more complicated is asso
Externí odkaz:
https://doaj.org/article/7c03ee2ebd5446fdaf6b131fe3e44124