METHOD OF PRODUCING GROUTING COMPOSITION FOR WATERPROOFING STRUCTURE IN ROCKS OF WATER-SOLUBLE SALTS Russian patent published in 2016 - IPC E21B33/138 C09K8/12 

FIELD: mining.

SUBSTANCE: invention relates to mining, specifically to methods of producing grouting compositions for waterproofing structures in rocks of water-soluble salts. Method of producing grouting composition for waterproofing structure in rocks of water-soluble salts involves preparation of a mixture containing an aqueous solution of polyacrylamide and a cross-linking agent, in mixture is prepared using a concentrated aqueous solution of low-molecular weight of polyacrylamide, prior to addition of a cross-linking agent, saturated salt solution is added, in which there is a waterproofing structure, and in addition salt of same composition in an amount required for saturation of aqueous solution of polyacrylamide. Volume of added salt solution is defined by required viscosity of grouting composition. Salts for saturation of aqueous solution of polyacrylamide are added in milled form.

EFFECT: technical result is preparing a grouting composition, improving reliability of waterproofing of underground structures in conditions of water-soluble salts by waterproofing surface of structure in a wide range of controlled time, temperature and degree of water mineralisation.

1 cl, 2 tbl