Link for citation: Beisekeyev Ye. Sh., Yazikov E.G., Vorontsov P.Yu., Duysebayeva  T.S. Optimization of leaching mode in hydrogenic uranium deposits with high permeability sand benchmark. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 4, рр.34-42. In Rus.

The relevance of the study is caused by the increase in the volume of uranium production at the deposits of the hydrogen type, the most common type on the territory of both the Republic of Kazakhstan. Аt the present stage there is a need to optimize the in-situ leaching to increase uranium ore extraction. The goal of the research is to substantiate the possibility of optimizing the regulation of the in-situ leaching mode at uranium deposits with a mature sandy benchmark and high permeability by reducing the rate of diffuse mass transfer to increase recoverability and prevent secondary ore genesis. Objects: boreholes logs and laboratory data of boreholes of block X of the Moinkum deposit of the Chu-Sarysu uranium ore province. Methods: physical and mathematical modeling, induction logging, gamma ray logging, caliper logging, temperature logging, correlation and analysis of log data using Curve Editor, GIK. The hardware includes PIK-50, KSP-43 instruments, NS caliper, TEG electro thermometer, logging station, BSK interface and switching unit. Results. Data of electric logging, gamma ray logging, and thermometry and caliper log data of the boreholes of block X of the Moinkum deposit, obtained by resistivity logging, intrinsic polarization potential logging and induction logging methods were correlated with subsequent analysis. The geological and technological conditions of ore extraction are revealed on the basis of the analysis. The features of mineralization and patterns of technogenic impact on the ore-bearing rock are analyzed. Optimization solutions were developed for intensification of ore extraction and control of secondary technogenic ore genesis based on the permeability factors of the rocks of the ore-bearing strata. The feasibility of controlling the diffusion rate in leaching by changing the thermo baric regime and the viscosity of the solution at the experimental boreholes of the Moinkum deposit of the Chu-Sarysu uranium ore province was proved. The paper introduces the method for calculating the optimal parameters of the leaching mode based on the characteristics of diffusion in rocks with different permeability.