RESEARCHER OF THE EARTH SUBSOIL AND HIS CONCEPT OF SUBSOIL USE

March 19, 2025 marks the 90th anniversary of the birth of Yuri Andreevich Tkachev (19.03.1935—01.10.2020), Doctor of Geological and Mineralogical Sciences, Professor. He is widely known in Russia and abroad for his research and fundamental work in the field of geostatistics, mathematical modeling of geological processes and phenomena, geological and environmental assessment of mineral deposits. Based on the research materials, Yu. A. Tkachev published more than two hundred and seventy scientific works, including eight monographs, three inventions, computer programs in Turbo Pascal-7 for statistical data processing, and ten new training courses. In addition to courses in his main scientific profile, Yuri Andreevich gave students lectures on geodesy and engineering and geodetic works, aerospace methods, engineering geology, land hydrology, he developed and was the first to implement a system of testing students' knowledge, and trained seven Candidates of Science. The professor took part in the preparation and discussion of the law of the Komi Republic "On Subsoil", and developed an original model of economic management of geological production. Yuri Andreevich was awarded the medals "Veteran of Labor" (1975), "For Contribution to the Development of Invention" named after A. S. Popov, the Honorary Medal of the International Academy of Authors of Scientific Discoveries and Inventions "For Merits in Invention" (2000), the Honorary Certificate of the Russian Academy of Sciences (1999), the Commemorative Badge "For Merits in the Study of the Subsoil of the Komi Republic" (2000), the honorary title "Honored Scientist of the Komi Republic" (1993), the title "Honorary Veteran of the Ural Branch of the Russian Academy of Sciences" (2019). He was a Full Member of the International Academy of Authors of Scientific Discoveries and Inventions.
The staff of the scientific library of FRC Komi SC UB RAS organized an exhibition of biographical works in memory of Professor Yu. A. Tkachev, reflecting his diverse activities.