The Effect of Temperature on the Mechanical Properties and Workability of Rock Salt

• Autorzy: Piotr Małkowski , Łukasz Bednarek , Krzysztof Kotwica , Grzegorz Stopka
• Języki publikacji: EN

Abstrakty

EN

Underground salt mining accounts for about 16 percent of the total salt production worldwide. When excavating salt rock, the cutters of the road header come into contact with the rock. This produces friction and, consequently, a rise in temperature. Generally, as temperature increases, salt gradually loses its plasticity. The extent of these alterations depends on the presence of other minerals in the rock. This paper presents the results of laboratory tests on regularly shaped samples of salt. An analysis was performed of the results of compressive, tensile and induced-shear strength, and of Young's modulus, Poisson's ratio, cuttability index and side chipping angle. The testing was conducted on samples with a temperature of about 20°C and samples heated to 50°C and 80°C. The tests showed that as temperature increased, so did compressive and tensile strength, and longitudinal and transverse strain of salt. The temperature increase caused, however, a decrease in shear strength. The cuttability index and the side chipping angle also decreased when the heated samples were being cut. The percentage changes in the parameters within the 60-degree temperature range were as high as several dozen percent. (original abstract)

Słowa kluczowe

EN

Mining sector; Mining exploitation; Mineral resources

PL

Górnictwo; Eksploatacja górnicza; Surowce mineralne

• Czasopismo: New Trends in Production Engineering
• Rocznik: 2019
• Numer: vol. 2(1) cz.II Part II: Selected Organizational Problems in the Mining Industry
• Strony: 384--393

Twórcy

autor

Piotr Małkowski

• AGH University of Science and Technology Kraków, Poland

autor

Łukasz Bednarek

• AGH University of Science and Technology Kraków, Poland

autor

Krzysztof Kotwica

• AGH University of Science and Technology Kraków, Poland

autor

Grzegorz Stopka

• AGH University of Science and Technology Kraków, Poland

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Identyfikatory

DOI

10.2478/ntpe-2019-0041