Selecting the rational parameters for restoring filtration characteristics of ores during borehole mining of uranium depositst

Abstract

Purpose. The research purpose is to increase the efficiency of borehole uranium mining by selecting special decolmating solutions and rational parameters of the technology for influencing the seam near-filter zone of geotechnological boreholes, as well as improving the filtration characteristics of the seam, depending on the mineralogical composition of ores and the structure of sediment-forming materials. Methods. The method of X-ray phase analysis was used to study the powders. The core material samples were studied on transparent sections using a LEICA DM 2500 P microscope. The content of the elemental composition of the ores and host rocks in the samples of the productive horizon was controlled using an atomic emission spectrometer. Findings. Based on the research results, quantitative-qualitative characteristics of the host rocks in the productive horizon, sedimentary formations from technological boreholes have been determined, revealing various levels in the productive horizon. It has been found that in the Campanian horizon boreholes, ores have a complex structure and multicomponent sedimentary formations, representing a mixture of sediments of mechanical-chemical origin. Originality. The results of quantitative-qualitative, microscopic, thermal research methods of the characteristics of ore-bearing rocks from various horizons at the Syr Darya depression uranium deposit have been studied and comparatively analyzed. The sedimentary formations of technological boreholes in the productive Santonian, Maastrichtian, Campanian horizons of the Northern Kharasan field, Syr Darya depression, have also been sampled and studied. The choice of the most appropriate composition of chemical reagents for dissolution and prevention of sedimentary formation in porous media has been substan-tiated by the microscopic research method. Practical implications. A detailed study and comparative analysis of the characteristics of ores and host rocks in various productive horizons makes it possible to more accurately plan the mining of blocks, minimizing emerging risks. Using the developed combined technology for intensifying borehole uranium mining, it is possible to increase the efficiency of borehole uranium mining and reduce its operating costs. At the same time, the ecological and industrial safety of the work of intensi-fying the leaching uranium ores increases.

Mechanism and technological results of sulfidation roasting of oxidized lead compounds

“…The original pyrite concentrate and zincoligonite ore have a zero magnetic susceptibility value, and the roasting product of the original ore has a low magnetic susceptibility value, which ranges from 0.01-0.2 SI units when the temperature changes from 650 to 750 ºC [ [18], [19], [20], [21], [22], [23], [24]].…”

The Influence of the Physicochemical Characteristics of Ores on the Efficiency of Underground Well Leaching of Uranium Deposits in Kazakhstan

“…The innovative method involves the direct treatment of the well's filtration area or near filter zone (NFZ) of wells with hydrofluoric acid solutions, ensuring maximum destruction and prevention of precipitation in the reservoir for an extended period. The method further involves the controlled delivery of hydrogen peroxide into the leaching solution through technological wells [16,17]. The introduction of hydrogen peroxide enhances the productivity of operational blocks and the overall metal extraction efficiency by increasing the uranium content in the productive solution.…”

“…wells [16,17]. The introduction of hydrogen peroxide enhances the productivity of operational blocks and the overall metal extraction efficiency by increasing the uranium content in the productive solution.…”

Predicted resource assessment of Central Kazakhsta ore districts based on airborne geophysical methods

“…The radioactive element content changes dramatically from point to point (not like in magnetic and gravitational fields). Therefore, in order to remove excessive "diversity" and obtain more statistical content values, the filtering method is used [34].…”