Место работы автора, адрес/электронная почта: ФИЦ "Якутский научный центр СО РАН", Институт горного дела Севера им. Н. В. Черского СО РАН ; 677007, г. Якутск, пр-т Ленина, 43 ; http://www.igds.ysn.ru
Северо-Восточный федеральный университет им. М. К. Аммосова, Геологоразведочный факультет ; 677013, г. Якутск, ул. Кулаковского, 50 ; https://www.s-vfu.ru/
Область научных интересов: Экспериментальные исследования и разработка методического обеспечения георадиолокации мерзлых горных пород россыпных месторождений криолитозоны
ID Автора: SPIN-код: 5083-8010, РИНЦ AuthorID: 643256
Количество страниц: 12 с.
This article presents the developed physical and geological models for the GPR method, which is currently actively used in the study of mining and geological and geocryological conditions of developed alluvial deposits in the cryolithozone. The relevance of the development of GPR models is dictated by the need to determine the features of wave fields (radargrams) for reliable data interpretation. Typical models of horizontal layered structure of the upper part of the geological section (frozen loose sediments, including those with inclusion of layer ice, paleorules) of diamondiferous placers in the subarctic zone of Yakutia are considered. Computer modeling was carried out in the gprMax system using the numerical finite difference method in the time domain. Based on its results, the GPR models containing a scheme of the geological section with a description of electrophysical properties and a synthetic radargram were built. Analysis of the results of computer modeling allowed us to determine the features of the radargram structure, parameters of GPR signals in the presence of formation ice, paleorules sections. The results of the studies have shown that the developed GPR models contribute to the improvement of signal processing procedures and the development of data interpretation features in the study of the geological structure and geocryological conditions of alluvial deposits in Yakutia (using the example of “Mayat River” Anabar district) by GPR.
Георадиолокационные модели массива горных пород субарктической зоны Якутии / Л. Л. Федорова, К. О. Соколов, Н. Д. Прудецкий, С. Д. Шамаев ; Институт горного дела Севера им. Н. В. Черского // Горный информационно-аналитический бюллетень. - 2023. - N 12-2. - C.129-140. - DOI: 10.25018/0236_1493_2023_122_0_129
DOI: 10.25018/0236_1493_2023_122_0_129
Количество страниц: 6 с.
- Математика. Естественные науки > Геология. Геологические и геофизические науки,
- Математика. Естественные науки > Общая геология . Метеорология. Климатология. Историческая геология. Стратиграфия. Палеогеография,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Геология. Геологические и геофизические науки.
One of the ways to obtain information about the cryogenic state of rocks by GPR is based on the analysis of the in-phase axes of signals reflected from local objects. On the images of GPR radargrams, similar in-phase axes are represented by hyperbolic curves. On the basis of their localization and refinement of the form, the speed of passage of an electromagnetic wave in the medium is determined. To refine the shape of the hyperbolic curve in the developed algorithm, methods based on the Hough transform were used. To optimize the performance of the algorithm, restrictions on the dimensions of the original and accumulator spaces are introduced. The boundaries of the original space were determined on the basis of previous studies on the detection of hyperbolic axes of common-mode signals. The dimension of the Hough space was reduced on the basis of a priori knowledge of the possible allowable speed of electromagnetic waves in the medium. As a result of the work of the created software, the speed of propagation of an electromagnetic wave in space above the local object and the real part of the complex relative permittivity are calculated, which makes it possible to determine the electrophysical properties of the medium. Testing of the developed algorithm was carried out on the results of field georadar measurements and synthetic data. The accuracy of the results of the algorithm was 98.6 %, which indicates the adequacy of its applicability for studying ice in permafrost layers.
Петрова, Е. А. Определение положения подземного льда в массиве мерзлых горных пород по данным георадиолокации на основе преобразования Хафа / Петрова Е. А., Соколов К. О., Прудецкий Н. Д. ; Северо-Восточный федеральный университет им. М. К. Аммосова, Институт горного дела Севера имени Н. В. Черского // Успехи современного естествознания. - 2023. - N 8. - С. 86-91. - DOI: 10.17513/use.38092
DOI: 10.17513/use.38092
Количество страниц: 8 с.
The analysis of the published materials on the physical properties of rocks, geological structure and technologies for the development of placer deposits of gold and diamonds is carried out. The most large-scale and unique placer deposits of Yakutia are considered, their main characteristics requiring detailed studying by geophysical methods are determined (nature of a relief of the balsa, capacity of friable deposits, geological formations and heterogeneity of the composing field, the productive reservoir in their shape and size, patterns of their localization, contour placer). As a result of the analysis of the current state of geophysical technologies for the study of rocks, geological and mining terms alluvial deposits of gold and diamonds of Yakutia is reasonable the choice of rational directions of the geophysical complex for operational control of the completeness of extraction of mineral resources and improve the efficiency of mining in permafrost.
Современное состояние геофизических технологий изучения строения и состояния массивов горных пород при разработке россыпных месторождений золота и алмазов Якутии / Л. Л. Федорова, кандидат технических наук, доцент, К. О. Соколов, кандидат технических наук, Д. В. Саввин, кандидат технических наук, Н. Д. Прудецкий ; Институт горного дела Севера им. Н. В. Черского // Вторая Якутская комплексная экспедиция: начало пути : сборник материалов республиканской научно-практической конференции. – Якутск : Издательский центр СВФУ, 2017. – С. 261-267.
Количество страниц: 6 с.
- Математика. Естественные науки > Геология. Геологические и геофизические науки,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Инженерное дело. Техника в целом > Горное дело. Горные предприятия (рудники, шахты, карьеры),
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Геология. Геологические и геофизические науки,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Инженерное дело. Техника в целом > Горное дело. Горные предприятия (рудники, шахты, карьеры).
At present, an important area of research in geomechanics is the study of the structural-tectonic structure of rock massifs. The main structural features of the rock mass, determining its geomechanical properties are fracture, blockiness and stratification. Information on these features, as a rule, is obtained by visual observation of outcrops and by analysis of data from various geophysical methods. In the article, it is proposed to use the georadiolocation method to identify zones of increased fracturing and discontinuous disturbances in loose cryolithozone deposits. In mining, the greatest interest is caused by cracks with a length of 0.1 m to 100 m and blocks ranging in size from tens of meters to 10 km, delineated by geological disturbances, tectonic ruptures, etc. Georadar tracking studies were conducted in the Anabar region of the Republic of Sakha (Yakutia), on a site with numerous tectonic structures that cut the foundation, which appear in the near-surface layers. The article presents examples of georadiolocation cross sections of highly fractured dolomite, rupture and crushing of rocks. The survey was carried out by georadar OKO-2 with ABDL Triton (60 MHz). It is established that the central frequency of the Fourier spectrum ( f c) of the first section and its non-fracturable part (0-15 m) is in the region of 55 MHz. f c of the signal spectra obtained during the probing of the fractured part of the section in the depth interval of 5-8 m showed the presence of a low-frequency component (40 MHz). In the second section, obtained with AB 250 MHz, in the undisturbed part of the array, the central frequency of georadar tracking signals was f c = 233 MHz. In the region of discontinuity of the axes of in-phase georadar locating signals, f c = 170 MHz, in the crushing region of rocks, f c = 292 MHz.
Спектральные характеристики данных георадиолокации на участках с разрывными нарушениями месторождения р. Маят / К. О. Соколов, Н. Д. Прудецкий // Горный информационно-аналитический бюллетень. – 2017. – N S24: Материалы IV Всероссийской научно-практической конференции, посвященной памяти чл.-корр. РАН М. Д. Новопашина "Геомеханические и геотехнологические проблемы эффективного освоения месторождений твердых полезных ископаемых Северных и Северо-Восточных регионов России" (г. Якутск, 18-21 сентября 2017 г.). – C. 358-363.
Количество страниц: 8 с.
- Математика. Естественные науки > Геология. Геологические и геофизические науки,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Инженерное дело. Техника в целом,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Геология. Геологические и геофизические науки,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Инженерное дело. Техника в целом.
One of the problems in placer mining by the opencast method in the North is the determination of rock mass fracturing. Generally, fractures in loose sediments are filled with conglomerates and ice. The presence of ice complicates geological exploration by increasing amount of drilling and promotes formation of oversizes after blasting. At the present time, fractures can be detected by various geophysical methods, seismic exploration, acoustic logging and ground-penetrating radar. Seismics and acoustic logging are mostly used to study deep fractures, while ground-penetrating radar is applicable at shallow depths (to 30 m). Proper procedures and software to backup the ground-penetrating radar studies are unavailable by now. Aimed to develop criteria for detecting fractures in permafrost by ground-penetrating radar, physical modeling of GPR sounding in permafrost rock mass with ice-filed fracture is carried out. The modeling results are described. The sounding was implemented using ground-penetrating radar OKO-2 (Logis-Geotekh Group of Companies, Russia) with antenna assembly AB-1200 MHz...
Физическое моделирование распространения электромагнитной высокочастотной волны в массиве горных пород с трещиной заполненной льдом / Н. Д. Прудецкий, К. О. Соколов, Л. Л. Федорова. – Текст : непосредственный // Горный информационно-аналитический бюллетень. – 2018. – N 11. – C. 107-113.