Authors: V.S. Fedotenko, D.N. Radchenko, L.A.-S. Gadzhieva

Title of the article: Selection of geopolymer material composition for isolation of mining structures during in-situ mine leaching

Year: 2024, Issue: 4, Pages: 125-137

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622.273.218

DOI: 10.26730/1999-4125-2024-4-125-137

Abstract: Based on the review and analysis of modern methods of in-situ (block) leaching, it has been established that the most significant disadvantages limiting the application of this technology are the high risk of migration of aggressive solutions, high ore losses in pillars and the practical impossibility of explosive preparation of ore mass to the size required to achieve a high level of metal recovery. To solve these problems, the technology of in-situ leaching in chambers specially created in the subsurface and designed for loading ores with non-ferrous metals and their subsequent leaching in underground conditions was proposed. The efficiency of the proposed technology is largely determined by the possibility of isolating the working space by creating special structures with the required characteristics in the walls and base of the chamber. The article presents the results of the study of host rocks of copper and cobalt ore deposits in the light of the possibility of forming geopolymeric materials on their basis, characterised by the required strength, hydro-, thermal-, acid-resistant properties. As a result of laboratory research, it was established that host rock geopolymers are characterised by high strength characteristics - up to 22 MPa, resistance to sulphuric acid concentration up to 10%, low water absorption and resistance to high temperatures up to 600°С.

Key words: In-place leaching reactor chamber insulation stability of mining structures acid resistance geopolymer dacite comprehensive exploitation of mineral resources

Receiving date: 27.05.2024

Approval date: 25.07.2024

Publication date: 26.09.2024

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