Abstract
The 3D mathematical model of temperature conditions in salty rock mass at shaft mouth takes into account parameters and modes of freezing unit operation, temperature of ambient air and air in the shaft, as well as nonuniformity and rate of salinity of enclosing rocks. The model allows dynamics of temperature variation in rocks around the shaft and load-bearing capacity of each pole of head frame foundation depending on rock mass temperature and salinity. Different variants of freezing unit operation are considered to select the variants to ensure the required load-bearing capacity of the head frame poles and the diamond shaft lining safety.
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