METHOD FOR PRODUCTION OF DIAMONDS IN PERMAFROST KIMBERLITIC DEPOSITS Russian patent published in 2012 - IPC E21C41/26 

FIELD: mining.

SUBSTANCE: method includes opening of mineral resources, advance boring of auxiliary wells of minor diameter and then of main wells concentric with them by core drill of large diameter, separation of cores from mass, their lifting to the surface and further shattering and disruption. Wells are drilled using thermal influence, for instance by thermo-friction method, and cooling of bits by cleaning agent; when temperature of face and well walls is 100°C and below, SAS solution is grouted into well; then when cores of large diameter are lifted in cold season they are influenced by natural cold below 0°C, further disruption is performed under positive temperature.

EFFECT: defrosting of permafrost kimberlites by heat of technical processes accompanying technical cycle of diamonds production, and freezing of kimberlite using natural cold.

2 cl, 1 dwg