Purpose. To determine the effect of special chemical reagents in the composition of leaching solutions on geotechnological parameters during uranium well extraction. To study the possibility of applying this method to increase efficiency of well extraction of uranium ores by intensifying ecotechnological processes of underground uranium leaching. To ensure design capacity of producing blocks and the completeness of extracting metal from them, reduce and prevent sediment in porous medium, reduce specific consumption of sulfuric acid, electric power, labor and other production costs in the process of uranium well extraction. Methodology. The research includes consistent literature review, laboratory and practical studies in real conditions. The samples studied in the laboratory by X-ray phase analysis of mineralogical characteristics of sedimentation were taken from Syrdarya depression. Chemical reagents were selected and tested in geotechnological wells during experimental extraction of uranium. The resulting geotechnological parameters of wells were compared to experimental data. Findings. Values of pH parameters of leaching solutions were obtained within the range from 6,5 to 2,3; it was established that Eh values initially tend to increase sharply to 300 - 380 mV and then to decrease to 170 mV; uranium content in productive solution was consistently growing from 29 to 146 mg/l; the values of iron salts (Fe<^>3+, Fe<^>2+) concentration in the productive solution were determined in the case when they were affected by chemical multifunctional reagents. Originality. The method for intensification of uranium well extraction has been developed and justified. It is based on a new complex of chemical reagents producing a selective effect on uraniferous minerals, which improves performance of producing blocks. Practical value. Rationally selected oxidizer and chemical reagents, as well as the scheme of their feeding into the productive horizon allow intensifying solution of four-valent uranium in complex mining and geological conditions by underground leaching and improving performance of the producing block.

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