Pronskiy D. Substantiation of parameters of grouting the zones of decompaction of a rock massif by clay grouts

The thesis is devoted to the questions of liquidating the shalolow bedded zones of decompaction in the disperse sandy-clayish soils, the formation and development of which are mainly connected with the operation of objects of hydrotechnical construction as well as intensive mining of mineral resources. On the basis of the Integrated Grouting Method the new approach to the liquidation of such local structures has been offered which consists in the injection of the clay grout in the zone of decompaction with the formation of canals of hydrobreaking and consolidation of a soil skeleton under the action of grout pressure in those canals. On the basis of theoretical and experimental research the technological parameters of grouting the zones of decompaction of a rock massif by clay grouts have been grounded. Those parameters ensure reliability and ecological safety of engineering objects. The results of the thesis allowed us to develop the new methodology of designing the technological parameters of grouting the zones of decompaction of a rock massif by clay grouts. The methodology of the design has been successfully introduced under the development of the project of grouting the zones of decompaction of the clayey-gypsum layer of the mine № 2 belonging to the Stebnitsky state mining and chemical enterprise "Polimineral".