Mining of alluvial deposits by underground mining in permafrost conditions is carried out by chamber and chamber-lava systems of development.

The main disturbing influence on mine calorifiers and other heat objects (boilers, boiler rooms, water pipes, etc.) in the systems of automatic temperature control is the value of the increment of the outside air temperature for some constant interval of observation. ...

Within the area of permafrost distribution there are large reserves of minerals, which are located in rocks with both negative and positive temperatures. Exploitation of deposits of this kind has very significant peculiarities in comparison with exploitation under normal conditions.

The chamber-shield system with the use of mobile shields was proposed for the extraction of thick gentle seams. Production tests of such a system (1959) with the LG NK-1 shield confirmed the high efficiency and reliability of the mobile support of the protective type.