| 摘要 |
FIELD: mining, reinforcing steps of permafrost ground. SUBSTANCE: prior to thermal insulating, injection of free water into rocks is carried out. This if followed by rock freezing. Thermal insulation is applied by spraying in 2 layers. The layers are different in mechanical, adhesion, and thermal insulating properties. Temperature under thermal insulation is lowered using air cooling devices. Time for switching on the devices is determined on the base of rock and air temperatures. EFFECT: reinforced rock steps. 1 cl |
