METHOD FOR WATER RESOURCE PROTECTION BY MEANS OF HORIZONTAL (INTERFORMATION) CUTOFFS AND CUTOFF ERECTION TECHNIQUE

摘要

FIELD: construction.;SUBSTANCE: invention concerns underground water protection against depletion and contamination and mine protection against flooding. The method includes construction of horizontal cutoff, i.e. an artificial confining layer, within a lithological or hydrogeological window. Where there is no the confining layer, vertical mine shaft or shafts pass, from which a ring of radial injection wells is drilled. Based on the well lengths, 2 or 3 zones or intervals are selected for injecting the water-permeable rocks within the window by fixing agents with different viscosity or fluidity and setting or gelling rate, after setting of which a horizontal interformation cutoff is formed in the window area that prevents underground water crossflows between the adjacent beds and contamination of the aquifer used for water supply.;EFFECT: prevention of aquifer depletion and contamination by creating horizontal interformation cutoffs within lithological windows.;3 dwg