Ishchenko O., Novikov L., Ishchenko K., Lohvyna L., Kinash R. Influence of surfactant on the explosive destruction of polymineral rocks
- Details
- Parent Category: Geo-Technical Mechanics, 2024
- Category: Geo-Technical Mechanics, 2024, Issue 168
Geoteh. meh. 2024, 168, 164-178
https://doi.org/10.15407/geotm2024.168.164
INFLUENCE OF SURFACTANTON THE EXPLOSIVE DESTRUCTION OF POLYMINERAL ROCKS
1Ishchenko O.,2Novikov L.,2Ishchenko K.,2Lohvyna L., 3Kinash R.
1Dnipro University of Technology
2M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
3AGH University of Science and Technology
UDC 622.235
Language: English
Abstract. Explosive destruction of rocks depends on their composition, the nature of mineral grain distribution, microcrack concentration and orientation, presence of gaseous and liquid phases. Surfactants are used to increase the efficiency of rock destruction by means of dynamic and explosive loads. The increase in destruction efficiency is achieved by adsorption reduction of the solid's surface energy, which leads to the formation of microcracks and a decrease in rock strength. Rock saturation with surfactant solutions is determined by the degree of solution acidity, rock porosity, content of liquid and gaseous components, and stress state. It is well known that surfactant solutions can lead to a 20–50% reduction in rock strength and the concentration of suspended dust particles. The decrease in strength occurs when the enthalpy of chemical reactions of a solid with an active substance is several tens of kilojoules per mole. The paper presents a method of experimental modelling of explosive rock destruction taking into account the influence of surfactants. It was found that the microcracking of granites is characterised by a high density of internal structure defects in the form of microcracks in quartz grains. In particular, the finely dispersed destruction products of pegmatoid granite samples, which are not treated with surfactants, mainly consist of elongated acute-angled fragments of quartz and feldspars (microcline and albite). As a result of studying the products of destruction by explosion of granite and ferruginous quartzite samples treated with a concentrated solution of sodium carbonate and 10% solution of sodium bicarbonate, it was found that quartz prevails in the composition of finely dispersed solid particles, which has a more rounded shape compared to quartz particles for dry samples. That is, sharp-angled fragments are practically not observed in the destruction products. It has been established that explosive destruction of granite and ferruginous quartzite samples treated with a sodium carbonate solution results in a significant increase in the average size of fine particles, as well as their median and quartile sizes. It has been established that the nature of the destruction of uranium and iron ores can be changed by treating them with surfactants. In addition, the formation of fine particles in the destruction products can be reduced by using explosive charges with different cross-sectional shapes.
Keywords: rock, surfactant, explosive destruction, microcracks, fine particles, particle size distribution.
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About the authors:
Ishchenko Oleksii, Candidate of Technical Sciences (Ph.D.), Associate Professor in Department of Construction, Geotechnics and Geomechanics, Dnipro University of Technology, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0003-2449-5258.
Novikov Leonid, Candidate of Technical Sciences (Ph.D.), Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the NAS of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0002-1855-5536.
Ishchenko Kostiantyn, Doctor of Technical Sciences (D.Sc.), Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the NAS of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0003-2237-871X.
Lohvyna Liudmyla, Junior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the NAS of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. , ORCID 0000-0001-9910-6865
Kinash Roman, Doctor of Technical Sciences (D.Sc.), Professor, Doctor in Department of Geomechanics, Civil Engineering and Geotechnics, AGH University of Science and Technology (AGH UST), Krakow, Poland, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0001-6715-9583
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