INNOVATIVE METHODS FOR INTENSIFYING BOREHOLE PRODUCTION OF URANIUM IN ORES WITH LOW FILTRATION CHARACTERISTICS
Authors:   Doctor of Technical Sciences, Professor, Head of Chair, Academician of National Academy of Sciences of Kazakhstan, Kazakh National Research Technical University. K.I. Satpayev, Almaty, Kazakhstan, Rakishev B. R. ,   b.rakishev@mail.ru,   https://orcid.org/0000-0001-5445-070X, Маtayev М. М. ,   Senior Researcher, Doctor of Chemical Sciences, Professor, High Technologies, JSC “Kazatomprom”, Almaty, Kazakhstan; mataev_06@mail.ru; https://orcid.org/0000-0002-9057-5443, Kenzhetayev Zh. S. ,   PhD doctoral student of the department "Mining", Kazakh National Research Technical University. K.I. Satpayev, Almaty, Kazakhstan; kzhiger@yahoo.com; https://orcid.org/0000-0003-2009-6655, Shampikova A. H. ,   PhD doctor, Lecturer, Kazakh National Research Technical University. K.I. Satpayev, Almaty, Kazakhstan; asel_0889@bk.ru; https://orcid.org/0000-0003-1634-4695, Toktaruly B. ,   PhD doctoral student of the department "Mining", Kazakh National Research Technical University. K.I. Satpayev, Almaty, Kazakhstan; b.toktaruly@gmail.com; https://orcid.org/0000-0002-4880-2606
Published: December 2020

The object of research is the technology of borehole uranium production with a low filtration characteristics. The purpose of the work is to increase the efficiency of borehole uranium production in complex mining and geological conditions by developing a new method based on the intensification of geotechnological processes of underground leaching of uranium, the impact of chemical reagents on the aggregate of sedimentation and mineralogical composition of ore-containing rocks of the productive horizon. At the same time, operating costs are reduced by increasing the productivity of the period of uninterrupted operation of geotechnical wells, as well as reducing the time spent working out technological blocks. Research methods include x-ray phase analysis, identification and discussion of the features, quantitative and qualitative parameters of core material and sedimentation from uranium deposits associated with the Syrdarya depression. Under laboratory conditions, the efficiency of the selected composition for the dissolution of sedimentary formations that reduce the permeability of layers was established by electron microdifraction. The applied hydrodynamic methods of well regeneration based on destruction and dispersion of sedimentation are considered and evaluated. The reagent methods used to increase the permeability of the productive horizon based on precipitation dissolution were also studied and evaluated. The results of experimental studies are analyzed and discussed, and a comparative schedule of the period of uninterrupted operation of wells is constructed. The effectiveness of the applied method for restoring the permeability of the productive horizon with the use of a complex chemical reagents. The scientific novelty lies in the fact that mineralogical studies of the core material composition indicate a complex structure of ores, in complex mining and geological conditions. The practical significance of the study lies in the high efficiency and applicability of the considered method of intensifying borehole uranium production in areas with low filtration characteristics.