Article name On the Issue 0f Imported the Quality Wells In-Situ Leaching of Uranium in the Cryolithic Zone
Authors Ivanov A.G. Candidate of Technical Sciences, Corresponding Member of the Russian Academy of Natural Sciences, Chief Specialist,
Arsentiev Y.A. Candidate of Technical Sciences, Associate Professor,
Gladyshev A.V. General Director,
Mikhailov A.. ,
Gurulev E.A. First Deputy General Director – Chief Engineer,
Ivanov D.A. Drilling Engineer,
Bibliographic description Ivanov A. G., Arsentyev Yu. A., Gladyshev A. V., Mikhailov A. N., Gurulev E. A., Ivanov D. A. On the Issue of Imported the Quality Wells In-Situ Leaching of Uranium in the Cryolithic Zone // Transbaikal State University Journal. 2024. Vol. 30, no. 2. P. 47–61. DOI: 10.2109/2227-9245-2024-30-2-41-61.
Category Subsoil Use, Mining Sciences
DOI 622.277
DOI 10.2109/2227-9245-2024-30-2-47-61
Article type Original article
Annotation The peculiarity of mineral deposits in Russia is that about 75 % of them are located in the cryolithozone (Academician of the Russian Academy of Sciences Melnikov V. P.). Uranium deposits, located in the cryolithic zone and mined by the in-situ leaching (ISL) method, are located in Transbaikalia and make a significant contribution to the all-Russian production of this metal. Difficult mining and geological conditions of mining require the adoption of extraordinary technical approaches to solving issues related to the development of such deposits. One of them is to improve the quality of construction of ISL uranium process wells and maintain their operational characteristics throughout the entire period of their operation. The relevance of the work is associated with the need to ensure efficient and environmentally safe uranium mining by in-situ leaching in the cryolicticsone. The object of the study is a deposit of in-situ uranium by ISL. The subject of the study is presented by peculiarities of construction of in-situ uranium leaching process wells in the cryolithozone. The purpose is to develop proposals to improve the quality of process wells. This paper examines the design elements of process wells that affect their operational characteristics, as well as the factors that influence the choice of decisions made The fulfillment of these tasks is complicated by the fact that polymer pipes, made of materials resistant to working solutions, are used as casing: low-density polyethylene, HDPE made of polyethylene PE100 (used earlier) and unplasticized polyvinylchloride NPVC with modifiers of frost resistance and impact strength (current used) or oriented NPVC with increased physical and mechanical characteristics (will be used in the future). Polymer pipes have significantly lower strength characteristics compared to steel pipes, which again requires non-standard solutions to ensure the reliability of production strings (PS) at various stages of the construction of process wells and during repair work on them. In this paper, issues related to the natural conditions of well construction, the stability of EC sections located in the cryolithozone zone and methods of its support, methods and materials for equipping the wellheads of technological wells are considered, information is provided on the results of laboratory work performed, separate stages of the technology for the application of the obtained viscoelastic.
Key words cryolithozone, uranium, production, process wells, production string, polymer pipes, wellheads, stability, centralizers, polymer resins, polymer cement materials
Article information
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