METHOD FOR ADVANCED ERECTION OF UNDERGROUND ICE-ROCK BARRIERS FOR PROTECTION OF KIMBERLITE MINES OF PERMAFROST ZONE FROM HIGH-PRESSURE WATER INFLOWS Russian patent published in 2024 - IPC E21D1/12 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in underground development of under-pit reserves of kimberlite pipes of permafrost zone with presence of high-pressure water-bearing horizons. Method for advanced erection of underground ice barrier for protection of kimberlite mine of permafrost zone from high-pressure water inflows includes drilling of vertical wells along contour of mined diamond-containing pipe, installation of freezing columns and freezing station with laying of pipelines of systems for transportation of coolant and its pumping through freezing columns with formation of distributed cylindrical ice-rock bodies with their subsequent closure into a solid monolith. Upon completion of open pit conservation beyond the limits of the trough of displacement of the rock mass, the vertical shaft of the newly constructed mine passes to the upper boundary of the water-bearing horizon, then the chamber of the mine yard and the cross-section pass to the boundary of the ore body. Along the perimeter of the ore body there is a ring-shaped horizontal mine working, from which along its entire length the calculated number of descending vertical freezing wells is drilled along the contour of the developed diamond-containing tube beyond the lower boundary of the water-bearing horizon and the freezing columns are installed in the wells, as well as drilling of thermometric and control wells. A freezing station is installed in the chamber of the mine yard, from which transport communications of the cooling medium are laid to the ring-shaped horizontal working. Coolant is pumped through freezing columns to form dispersed cylindrical ice-rock bodies with their subsequent closure into a solid monolith. Thermometric and control wells are used to control formed temperature conditions and intensity of ice formation. Upon completion of the ice barrier erection, the freezing system is switched from active to passive operation mode, providing its stable year-round negative temperature mode.

EFFECT: providing safety and improving efficiency of mining operations at underground finishing of diamond-containing pipe.

1 cl, 1 dwg