TECHNOGENIC WASTE FROM COAL MINING-A PROMISING RAW MATERIAL FOR THE PRODUCTION OF BUILDING CERAMICS
Stanevich V. Vyshar O. Rakhimova G. Rakhimov M. Kovtareva S.
2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025Issue 3233 - 251 pp.
This study addresses the urgent need for effective disposal methods for overburden rock produced during coal mining. These man-made formations represent large volumes of waste with negative environmental and landscape impacts. The rational use of overburden is therefore a key task, offering both ecological and economic benefits for mining regions. The paper presents a comprehensive analysis of the physical, mechanical, chemical, and mineralogical properties of overburden rocks. Composition was evaluated based on lithological type, depth of occurrence, and geological formation conditions. Special attention is given to the presence of natural radionuclides, as well as rare earth and noble microelements with potential value. The content of water-soluble salts influencing processing behavior is also identified. The molding and structural-mechanical properties of masses derived from overburden rocks were assessed. Experimental results show that additives such as highly mineralized carbonaceous rocks and aluminum oxychloride significantly enhance the plasticity and strength of the material. The resulting ceramic products demonstrated excellent performance: compressive strength ranging from 33.6 to 48.2 MPa, frost resistance from 50 to 100 cycles, and water absorption between 7.0–10.8%. Overall, the research confirms the technical and environmental feasibility of using overburden rocks in ceramic production. This approach reduces the cost of building materials, lessens dependence on scarce clay resources, and contributes to mitigating environmental damage in coal mining areas.
ceramic products , chemical composition , overburdened rocks , plastic strength
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Toraigyrov University, Pavlodar, Kazakhstan
Karaganda Technical University, Karaganda, Kazakhstan
Toraigyrov University
Karaganda Technical University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026