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8th EAGE International Scientific and Practical Conference and Exhibition on Engineering and Mining Geophysics 2012
- Conference date: 23 Apr 2012 - 27 Apr 2012
- Location: Gelendzhik, Russia
- ISBN: 978-90-73834-99-6
- Published: 23 April 2012
1 - 50 of 54 results
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Метод выделения объектов слабой контрастности
Authors Д.К. Большаков and С.Г. КатаевTo locate subsurface targets and other latent patterns using experimental probing signals early developed algorithm BINREL is being offered. BINREL is a modification of the method of revealing structures and it especially is competent at, when metric data are located in regular network. Used the algorithm has universal character; it not is related to particular form and nature probing signal. The algorithm permits to retrieve small targets and weak contrast on dielectric object properties.
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Опыт применения комплекса геофизических методов на оползневых склонах города Сочи
Authors В.В. Молдаков and Е.Ю. КоноваловаIn this article the results of application of complex of geophysical methods on landslide slopes are resulted Sochi. Geophysical information is got at engineer-geological works on an object: «Building and reconstruction of podpornykh sthenes and overflow-pipe buildings on a 1972 km of PK0+50 - PK8 of driving of Macesta - Host of the North-Caucasian railway». The analysis of the got geophysical data is produced.
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Проведение геофизических исследований на территории Семикаракорского городища
Authors С.А. Ерохин, М.Я. Кац, И.Н. Модин and А.М. ПавловаWe carried out complex geophysical investigations on the terrain of Semikarakorsk site. The main objective of geophysical survey was to investigate cultural layer, to found out and to describe anomalies with anthropogenic origin. These anomalies helped to specify structure of the site. Some of geophysical investigations was methodical - there were measurements on objects with archaeological excavation for following comparison of archeological and geophysical results, and then we used these knowledge for archeological substantiation of other geophysical anomalies. Complex of geophysical investigations included magnetic and electrical survey. Some important results about the site structure were obtained.
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Применение геофизических методов для поиска и трассирования тектонических нарушений
Authors Е.О. Саликова and М.Л. ТитаренкоThe purpose for geophysical activities was determining areas of tectonic disturbances initially defined by interpreting aero and space photos and geomorphologic surveys. Adjustment of section structure at anticipated tectonic disturbance areas was carried out by elastic wave propagation velocities as well as by apparent resistance parameter. Geological section geophysical parameters allowing to perform proper geophysical interpretation of field investigations and processing results thereof were resulted from integral geophysical surveys, covering electrical exploration and seismic survey.
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Оценка эффективности комплекса инженерно-геофизических методов для поиска и трассирования тектонических нарушений
Authors А.А. Колодий, А.А. Ясницкий, А.И. Диброва and В.Н. ШабаринThe diversity and complexity of the studied objects in the upper part of the section, in some cases make it impossible to complete their characterization according to a geophysical method. One of the most important conditions for successful problem solving investigation upper part of section is the choice of optimal set of methods. The purpose of this paper is to evaluate the effectiveness of integration of geophysical methods: correlation refraction method, resistivity imaging, radon method detection and tracing tectonic deformation.
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Методика выделения зон островной мерзлоты в условиях перигляциальной зоны Горного Алтая
Authors Д.А. Долганов, О.Ф. Кузьменкова, И.С. Долганова, Р.Р. Гимранов and Р.Р. ХайруллинThe geological and geomorphological conditions of permafrost manifestations in various stratified formations of the Periglacial Zone of Gorny Russian Altai are consided. The genetic nature of the of the island permafrost zones and its main geophysical parameters are showed. We propose an optimal set of geophysical methods to identify zones of permafrost: elektrotomografiya, seismic tomography in the longitudinal and transverse waves, the best mathematical transformation of the actual data
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Применение методов сейсмо - и электротомографии для обнаружения зон повышенной трещиноватости при строительстве трубопроводов способом наклонно-направленного бурения в горно-складчатой области
Authors C.Г. Миронюк, Д.А. Науменко and А.А. ВиндаOn the site of horizontal directional drilling in the area of Sochi (Krasnodar region) were carried out drilling, geophysical and laboratory works. Under geophysical studies particular attention is paid to the study of of the geological structure of the bedrock, identifying faults and zones of jointing. Our experience has shown, positioning of small-scale heterogeneities of the geological environment such as zones of jointing of the traditional methods of seismic and electrical exploration is characterized by low accuracy. At the same time, the joint application of seismic tomography and electro tomography demonstrates greater efficiency and reliability of detection of these zones.
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Изучение азимутальной анизотропии сопротивления среды методом дипольного электромагнитного профилирования (ДИП)
Authors А.Д. Каринский, В.А. Шевнин and Т.В. ЯловTheory and formulas for calculation of apparent conductivity and apparent resistivity determined by dipole - dipole electromagnetic profiling in near zone above azimuthally-anisotropic half space are developed. Three orientations of transmitting and receiving magnetic dipoles are considered: vertical magnetic dipoles; horizontal magnetic dipoles with equatorial and axial orientation are considered and azimuthal diagrams are calculated. Practical field measurements confirm theoretical conclusions
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Выявление слабых аномалий электрического и магнитного поля над непроводящими объектами
Authors В.А. Агеев, И.Н. Модин and Д.В. МакаровAnomalous effect of induced non-conductive linearly elongated objects can be increased by using vertical electrical dipole.In case of measuring electrical field the effect increases by 2.5 times. Magnetic field proves its sensitivity only to high-resistivity objects.
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Изучение анизотропии гидравлической проводимости с помощью азимутальных измерений в методе естественного поля
Authors В.А. Шевнин, С.А. Ерохин and А.М. ПавловаNew field technology for studying anisotropy of hydraulic properties in fractured rocks on azimuthal SP measurements, developed by D.N. Wishart and L. Slater, is considered and used to study water filtration in loose grain sediments of river floodplain. Azimuthal SP diagrams allow finding direction of groundwater filtration and can add to traditional azimuthal resistivity survey
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Электрические зондирования на акватории Белосарайского залива в Азовском море
Authors М.А. Андреев, И.Н. Модин and Г.Б. Рязанцев Химический факультетIn the summer of 2011 in waters of Azov Sea continuous aquatic soundings (CAS) research was performed. The main purpose of the research was to find and map natural methane tanks in the coastal area of the sea near Yur’evka village. CAS technology appeared in 2006 and the present day it is the basis for performing electric soundings on water areas in Russia. Typically CAS is applied on lakes and rivers where average electrical resistance is rarely decreases below 50 Ohm.m, but during this marine survey it was about 0.7 Ohm.m, so for the research group it became the first experience of managing with such a kind acquired data. The article assess the possibility of CAS application for marine surveys, discovers the technology and methodology of CAS and also contains results of the research.
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Новые подходы к интерпретации геофизических материалов
Authors А.Е. Каминский and В.Л. ЛухмановThe paper examines the interpretive techniques of both new and well known, used by us in recent times in the processing of geophysical data field. Adhering to the principle that all new - it is well forgotten old, we do not claim authorship of these techniques, and are focused on their program implementation and practical application. In the presentation of the material is quite diverse, we have tried to sustain a single style: formulation of the problem - solve it - examples of use. The proposed solutions can be used in various fields of geophysics. Therefore, we tried to select examples of its various areas, focusing primarily on seismic and electrical prospecting.
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Опытное опробование высокоразрешающих методик электроразведки ВЭЗ при производстве инженерно-геологических изысканий в криогенных разрезах
Authors Б.В. Бучарский, Д.Н. Бондаренко, В.В. Горячев and Д.М. СавельевHigh level of the subsurface cryogenic section vertical resistivity profiling detailed study, processability and time reduction of the geophysical surveys implementation are shown by testing use of a set of high-resolution vertical electrical sounding techniques and methods (electrical resistivity tomography with SibGeofizPribor SGD-ETT station, electrical sounding with Geometrics OhmMapper meter) in the process of geological engineering surveys within Chayandinskoe oil-gas condensate field site construction project in the Yakutia region
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Возможности электротомографии для мониторинга фильтрационных процессов в теле каменно-набросной плотины во время наполнения водохранилища
Authors Д.К. Большаков, И.Н. Модин and О.В. КозловRepresented results of mathematical modeling and field measurements are a part of results of researches directed on working out a technique of optimum monitoring of possible occurrence and development of processes in body dams. A main objective of the calculations made and the field works executed – preparation of methodical recommendations, about control of development of processes during the reservoir filling, developed on the basis of theoretically well-founded possibilities and already tested technologies of a resistivity method.
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Опыт комплексирования электроконтакного димнамического зондирования и электротомографии
By А.И. АртюгинThis report focuses on the experience of complex applications of electric tomography and dynamic penetration of small-sized carrying unit. It is known that the lithological boundaries do not always coincide with the geoelectric boundaries. The electrical resistivity in the lithologically homogeneous geological layer may vary significantly, therefore, use of drilling data as parametric data for imaging in some cases leads to incorrect results. Electrocontact dynamic penetration allows to measure the relative density and of the soil to a depth of 15 meters. Geoelectric model obtained by inversion is smoothed so the geological boundaries often can not be accurately determined. Complex processing of data electrical tomography and electro dynamic penetration can significantly improve the quality of interpretation.
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Результаты геофизических исследований с целью выделения зон повышенной трещиноватости пород, зон фильтрации грунтовых вод и выделения участков для проходки скважин для мониторинга
Authors А.Ф. Волынин and А.Н. Подсеваловed in the area of the village “Selchoztechnika” for the selection of sites for placement of water wells for the monitoring observations to determine the cause of flooding of the territory and the foundations of houses. The complex of methods included the method of seismic-acoustic profiling (SAP) (mapping areas of fractured karst limestone) and the method of vertical electrical sounding (VEZ) on sites allocated SAP. As a result of the work zone is found extensively damaged fractured limestone, within which identified two linear zones of heavy water-saturated rocks. It was specified placements of three bushes of wells (depth of wells of up to 70 m). 9 wells drilled entirely confirmed the recommendation. It was carried out monitoring of the changing of the hydro geological regime and composition of groundwater. The applied method can be used to solve analog problems on the areas of karst limestone.
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Изучение анизотропных свойств скальных пород геофизическими методами
More LessThe article describes an example of various geophysical engineering methods integration for determination of rocky soils anisotropic properties. The work was conducted in a montaineous area. Resultant processed data is presented along with conclusions on advantages and limitations of each of the method utilized for solving particular engineering problem. It is also mentioned that the results of every geophysical engineering method need to be contemplated areally and correlated to reach good agreement between the methods.
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Применение сейсморазведки МОВ ОГТ и электроразведки ВЭЗ/ЗСБ при выявлении тектонических нарушений
Authors Г.А. Горшков, Е.А. Дудко, Н.Н. Рудомаха and Т.И. ТомишинецAt last ten years the geophysical exploration using in the engineering research for industrial and civil construction: the refinement of engineering-geological characteristics of the construction site, and also evaluating the strength and deformation characteristics of coats. At the same time one of the most important tasks is the identification and tracing of tectonic disturbances. To solve this problem seems most appropriate to the application of geophysical research, containing of CDP reflection seismic method and electrical methods - vertical electrical sounding (VES), or sensing the emergence of the electromagnetic field in the near field (TEM). This article assesses the effectiveness of integrated CDP seismic reflection and electrical TEM / VES in the detection of tectonic disturbances in mountainous terrain at various sites Adler district.
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Применение георадиолокационных исследований при инструментальном обследовании подпорного сооружения на автомобильной дороге м-27 «Джубга-Сочи»
Authors О.Н. Баранов and Е.М. ПодтёлковAt the present time for the control of engineering structures are increasingly used geophysical methods. On the road M-27"Dzhubga-Sochi" in the mountainous part of the active landslide areas erected a large number of retaining walls and retainingstructures. Many of these structures were designed and built in the 80s of XX century, and not all working documentation is preserved. Most of these facilities need major repairs. For one of these walls was necessary to determine the design features to make design decisions to strengthen the structure.According to the project organization, with the monolithic concrete cladding panel were to be bored piles. This problem was solvedby the method of GPR-survey is widely used in recent decades.
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Применение высокопроизводительных технологий детального электропрофилирования в методе сопротивлений для обследования противофильтрационных экранов
More LessBases of high-efficiency mobile technologies of geophysical electroprofiling by a method of resistance with continuous measurements in movement and results of their industrial tests are stated at building of the loamy screen. Operational and technical and economic parameters of the mechanized and pedestrian variants of technology, and also the characteristic of quality of the screen are resulted.
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Электропрофилирование методом сопротивлений при изучении инженерно-гидрогеологических условий формирования растительного покрова на рекультивируемом отвале Лебединского горно-обогатительного комбината
Authors Ю.С. Погорелов and С.В. СергеевThe technique and results of geophysical dipolar electroprofiling on various sites of a sailing of rocks on Lebedinsky ore dressing industrial complex are stated. It is established that the pseudo-cut of seeming electric resistance characterizes heterogeneity of the top part of a bulk file on degree of dispersion of a firm phase and water penetration of a ground in a zone of aeration and allows to allocate in it sites with various conditions of development of a vegetative cover, a zone of a deep reservoir. It is shown that the method of resistance can be effectively used for monitoring of a blanket of sailings by working out of mineral deposits.
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Использование метода Резонансно-Акустического Профилирования (РАП) при поисках золоторудных и алмазных месторождений на примере месторождений Западной Африки, Южной Америки и Финляндии
Authors И.В. Зуйков and В.В. БединовDifference in apparent resistivity values determined in galvanic and inductive electrical and EM methods depends on macroanisotropy of layered cross-section and decreased penetration depth of galvanic methods without changing penetration depth of inductive methods. Joint influence of these two factors in case of high contrast of layers' resistivities results in difference in several tens of apparent resistivity values.
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Технология использования программного комплекса АСАД для интерпретации георадарных данных на площадных объектах строительства
By Н.И. УразаевIn modern practice, the interpretation of seismic data using complex programs with visualization of time and depth of cuts in three dimensions. For a sufficiently dense network of observations using GPR at construction sites of area without such a tool of interpretation is very difficult to do. Typically, the customer engineering geophysical studies has specialized seismic program complexes for independent review and analysis of the materials. The standard material transfer to the customer in engineering geophysics - the format of Acad, all organizations associated with the construction must have AutoCAD software produced by Autodesk. The report provides an example of 3D technology, and interpretation of GPR data of area in AutoCAD 2008. In the case of data in the format of Acad specialists in other areas of land surveyors, or designers can independently process the information about the object under study, for example, determine the location of underground utilities, etc.
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Различие результатов гальванических и индуктивных методов на примере ДИП и БИЭП
Authors В.А. Шевнин, А.А. Бобачев, И.Н. Модин and Т.В. ЯловNew field technology for studying anisotropy of hydraulic properties in fractured rocks on azimuthal SP measurements, developed by D.N. Wishart and L. Slater, is considered and used to study water filtration in loose grain sediments of river floodplain. Azimuthal SP diagrams allow finding direction of groundwater filtration and can add to traditional azimuthal resistivity survey
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Метод стоячих волн в инженерной сейсмологии
Authors А.Ф. Еманов, В.С. Селезнёв, А.А. Бах and А. КрасниковA standing wave field, different from other waves by coherence property in time, is always formed in closed spaces and stratified media. Extraction of standing waves per se from recorded wave fields on filtering basis by coherence in time and conversion of nonsimultaneous observations in simultaneous standing waves records in studied objects forms the basis of standing wave method. The method performs well in study of self-induced vibrations of buildings and constructions. The maps of amplitudes and phases of standing waves in set of natural frequencies, derived with given detail and accuracy, characterize an object in full and allow to determine not only its seismic stability, but realize a diagnostics of physical state at a level of constructional elements. In seismic microzoning the standing wave method performs well as direct researchmethod of resonant properties of section. Realizing a selection of standing waves in property of coherence in time, a standing wave field is separated in upper part of section and segregated on layer resonance. As a result we have a set of section natural frequencies and maps of vibration amplification on each of frequencies. On the basis of maps of standing wave phases a resonance type is simply set. The resonances, formed as multiples between horizontal boundaries, have the same close phase on area, whereas in lenses and block mediums horizontal resonances may appear characterized by banded change of areal phase. Combination of high-accuracy study of resonant properties of areas and buildings provides a new echelon of accuracy in seismic risk assessment.
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Геофизические исследования городища Джанкент
Authors С.А. Ерохин, И.Н. Модин and А.М. ПавловаThe article daels with the results of geophysical investigations of Djankent fortress, which was the capital of Oguz Turks, the historical Turkic tribal confederation. Very small part of the site (its size iz about 250×450 m) were explored by the means of archaeological excavations, so the aim of geophysical researches was investigation of the origin and structure of the base of a settlement (the average nowadays height is about 6 m) and recostruction of the ancient planning of some districs. The task was successfully completed by the means of electrial resistivity imaging and magnetic survey. The electrical tomography showed, that the base of fortress was made artificially with complex technology. The results of magnetic survey enabled to reveal the planning of a district, consisting of parts (40×40 m) with four yards in each part.
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Первые результаты применения георадара «Питон-3» в составе комплексов геофизических исследований в различных геологических условиях
Authors К.А. Костенко, Р.В. Пейсахов and А.В. ХилькоThe report shows the results of a profiling with the new GPR "Python 3" in the various complexes of geophysical research. In particular, discusses the results of GPR profiling under conditions of permafrost of Yamal, represented by sands and loams varying degrees of salinity. We compare the results of GPR with the results of seismic with CDP method. The report also covers the results of GPR profiling upon the ice on the aquatorium of the Novomoskovsk water storage basin. The water depth is up to eight meters, the power of the bottom muds of up to five feet. Soils represented by fluvioglacial deposits. We also consider an example of GPR research in the area of Novorossiysk in comparison with the results of seismic studies by multiple overlaps. Soils represented by marly strata, weathered from the surface to loam. In all cases the studies, with the use of low-frequency antennas (25 - 38 MHz), confidently reached the depth of the study 15 - 30 m, which is a revolutionary step in using GPR for engineering surveys, requiring, usually, the depth of the study about 15 - 20 m.
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Георадиолокационный способ определения электрофизических свойств грунтов
Authors А.В. Морозов, В.Л. Шаповалов and В.А. ЯвнаAs a result of experimental and theoretical studies the techniques are developed allowing to determine the permittivity by the visible borders of groundwater layers and intensity of the signals reflected from them as well as to estimate the conductivity of soil by the attenuation of the signal
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Основные преимущества телеметрических регистрирующих сейсмических систем при инженерно-геофизических исследованиях
Authors А.С. Федотов and С.А. ФедотовThe main advantages of telemetry seismic recording systems in engineering and geophysical studies
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Определение эффективности георадиолокационного метода по результатам измерения диэлектрических свойств грунта
Authors К.Ю. Кислица, З.Б. Хакиев, М.С. Рассудов and В.А. ЯвнаThe work is dedicated to the development of the method for determining the attenuation coefficient of electromagnetic radiation in a medium based on the results of direct measurements of the soil dielectric permittivity and conductivity in the range of frequencies used in the practice of GPR. The method is based on a comparison of the resonance frequency of a soil and reference samples. Advantage of this method is to maintain the soil structure during the measurement
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Определение сезонных изменений электрофизических свойств грунтов методом георадиолокации
Authors А.А. Кругликов, А.В. Морозов, В.А. Востров and В.А. ЯвнаThis work is dedicated to the development of a method based on GPR for assessing the moisture of railroad structural layers wich is varying by the occasional rainfall patterns and seasonal changes in weather conditions. As a result of theoretical and experimental research the technique of inspection of subgrade of railway track.
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Обработка георадиолокационных данных в режиме реального времени
Authors В.А. Явна, В.Л. Шаповалов, М.В. Окост, Г.И. Лазоренко and В.А. ВостровThe work describes a hardware-software complex (HSC) for the speed diagnosis of the condition of railway track. Designed HSC allows to handle the information received simultaneously from multiple channels of GPR system. As a result of the data processing the profiles and structural components of the layers are generated as well as their characteristics: the slope of the ground layers, moisture, layering and deformation of subgrade.
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Георадиолокационные исследования ледяных образований в пещерах
Authors Ю.И. Степанов, А.А. Тайницкий and А.В. КичигинIn 2010, we are carried out GPR studies in a remote cave Medeo. The cave is located in the territory of Srednevisherski area of West Ural folded zone carbone-bearing karst. The aim of the study was to examine the power and homogeneity of perennial ice formations. According to the results of the first defined power of multi-year ice and built a three-dimensional model of sediments.
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Георадарные обследования оползневых деформаций грунтов на откосах земляного полотна
Authors А.М. Кулижников and Р.А. ЕреминThis paper describes the experience of landslide road sections surveying by Ground Penetrating Radar (GPR) method. Theoretical justification of landslide soil deformations prediction based on the interpretation of amplitude-frequency characteristics of reflected signal of GPR in three specific zones is given. GPR surveying methodology, as well as received field, processed and interpreted radaragrams are reviewed. The article confirms working hypothesis based on the results of a subgrade slopes survey on the M-5 «Ural» Highway section.
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Опыт обследования высоких опор мостовых сооружений методом георадиолокации
Authors А.В. Старовойтов, М.Л. Владов, М.С. Судакова and А.М. РомановаThe results of GPR investigation of railway bridge bearings are shown. The internal structure of the bearings was determined and weak areas were identified. The results were compared with data from acoustic tomography; for the certification of the results drilling was used.
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Исследования на александровском полигоне методом георадиолокации с использованием моностатического георадара «ПИТОН»
Authors А.М. Пятилова, М.Л. Владов, А.А. Бобачев, И.Н. Модин and А.М. ТурчковGeoradar “Phyton” is a new equipment for GPR surveys. Using this radar in December 2011 were made researches on Alexandrovka’s training ground on the profile 1, where lots of geophysical methods data exists(electrical prospecting in different modifications, seismic methods, borehole geophysical studies), boreholes have been drilled. This information makes possible exact data binding and make its qualitative evaluation. In present report brief descriptions of “Phyton” and other used equipment are given, as well as methods of different investigations on Alexandrovka area. Techniques of data processing using RadExPro Advanced 2011.4, RES2inf, X2IPI software are given. The task of results interpretation is not only the maximum value of data mining in each method, but also comparison of different types of data – boring, seismic investigations, electrical prospecting.
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Изучение карстово-опасных территорий московского региона методом МОВ МОГТ
Authors Б.А. Гранит and А.Г. ГинодманThe study of karst-prone areas of the Moscow region by the CDP
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Возможности обработки данных многоканальных сейсморазведочных данных в инженерной сейсморазведке
Authors Н.А. Рагозин and А. С. ФедотовThe possibilities of processing with use of various types of seismic waves are given by the example of the seismic data received by means of multichannel telemetering system TELSS
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Сейсморазведочное обоснование инженерно-геологических исследований на территориях техногенных катастроф
Mine-technical collapses in many cases are stimulating the different near surface negative geological processes. They are karst activity, suffusion, destruction of the hydrodynamic balance. Most dangerous result of their activity is earth surface fast subsiding. Main target of the geological, geophysical and other services is the possibility such events prediction. Shallow seismic reflection is one of the most important sources of the information for this problem decision. Theoretical and methodical ensuring of the seismic using for this target is presenting with results of the practical checking for flooded salt mine territory
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Особенности деформируемости глинистых грунтов в диапазоне малых деформаций
Authors Е.А. Вознесенский, М.С. Никитин and А.Н. УсовSome regularities of clay soils deformation behavior in small-strain range (10-5 - 10-4) are presented based of consolidated drained triaxial tests. Both usual and local sensors were used for measurements of strains and pore pressure. The presented data demonstrate sufficient differencies between total and local strains at the same stage of loading as well as the influence of strain rate
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О возможностях применения F-X деконволюции для подавления некогерентных помех на сейсмических данных
Authors П.И. Блинова and С.А. ВакуленкоIn this paper we analyze capabilities of F-X deconvolution in reducing incoherent noise. Different types of seismic data, including synthetic data with linear and non-linear in t-x domain events and real seismic reflection data were processed using F-X deconvolution and results were compared. We came to conclusion that F-X deconvolution is efficient method for reducing of incoherent noise when the input data contains events close to linear. To achieve better filtering result on pre-stack reflection seismic gathers it is recommended that NMO correction is applied prior to FX filtering.
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Классификация аномалий сейсмоакустических волновых полей при совместной интерпретации наземных и шахтных исследований
Authors И.А. Санфиров, А.И. Бабкин, Г.Ю. Прийма and К.Б. ФатькинSafety Upper Kama potash deposit salt mines connects closely with stability of the water protective pillar above the potash thickness. Surface and mine seismic researches with using CDP observations are the main instruments for probable nature and technical origin hazards in water protective pillar limits predictions. Possibility of the most information receiving is in common using surface and mining seismic researches. Example of such kind complex interpretation is presenting.
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Сравнение эффективности применения метода MASW c традиционными методами сейсморазведки для целей инженерных изысканий
Authors А.А. Ясницкий, А.А. Колодий, В.Н. Шабарин and г. ТуапсеAlong with the traditionally used in seismic engineering survey methods (seismic profiling, CDP, seismotomography), the multichannel analysis of surface waves (MASW) method becomes all increasingly popular and already been successfully applied abroad. The main research tasks of this report are: testing techniques of field work by the MASW method; implementation of seismic profiling on the same profile; processing of the received materials, and their interpretation; analysis and comparison of the results.
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Компрессионно-вакуумный источник упругих колебаний для малоглубинной сейсморазведки
Authors А.А. Репин, В.Н. Белобородов and А.К. ТкачукThe authors give a brief review of the available elastic vibration sources for shallow seismic exploration, substantiate the need in the development of the compression vacuum percussion machines as an elastic vibration source and report the laboratory evidence on the new-designed prototype models.
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Возможности применения метода Резонансно-Акустического Профилирования (РАП) для изучения и прогнозирования развития процессов карстообразования
Authors И.В. Зуйков and В.В. БединовThe report briefly overviews the theory and possibilities of using the Resonance-Acoustic Profiling (RAP) method for engineering-geological surveys. The authors presents some examples of applying the method for mapping a karst zones and also for studying hydrogeology of survey sites. In the report examples of application of a method for studying both natural, and a technogenic karst are considered.
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Ложные границы на разрезах ОГТ
More LessThis report reflects the process of the formation transverse waves reflected in the horizontal direction from vertical contacts. Sometimes this waves form clear coherent lineups on the sections of CDP. It can put to the building of false dipping boundaries by interpretation.
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О достоверности наблюдаемых отражающих границ на суммарных разрезах инженерного МОВ ОГТ
Authors С.В. Буряк and С.А. ВакуленкоComplex wavefield frequently observed on the near-surface prestack seismic gathers being combined with suboptimal application of seismic processing algorithms may lead to observation of prolonged coherent events on the resulting stacked sections, which can be easily interpreted as reflections, although have nothing to do with reflected waves. To avoid misinterpretation, it is crucially important to compare the resulting stack with pre-stack seismic gathers to make sure that each reflection on the stack has a corresponding hyperbola time-curve on the gather
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Исследование динамических свойств карбонатно-глинистых полускальных грунтов в диапазоне малых сдвиговых деформаций
Authors Е.А. Вознесенский and А.С. ГорбуноваResults from laboratory tests on marls are presented, which have been conducted in order to observe the behavior of marls at very small strains and determine its dynamic properties. Damping properties of marl were of particular interest, since published data on this subject is extremely limited and its theory needs further development. Rock shear modulus (G, Pa) and damping ratio (D, %) were studied by means of resonant-column method. The study was carried out on intact solid cylindrical specimens and test results demonstrated shear modulus degradation and damping ratio growth as a function of shear strain. Aside from resonant-column testing, laboratory measurements of damping ratio α(f) were carried out using geophysical ultrasonic test methods. It was found, that damping indexes, obtained from two abovementioned methods, did not correlate with each other. It might have resulted from differences in equipment operational frequencies, as damping is a frequency-dependent parameter.
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Разведочные возможности нового образца многоканального сейсмоакустического комплекса с пневматическим излучателем малого объема
Authors М.Ш. Шарипов, Д.Ф. Исмагилов, А.А. Терехов and А.В. ФиличевEstimation of Real Possibilities of New Russian Multi-Channel 2D CDP HR Seismic & Acoustic Complex in the Examples Studies Sites in the Caspian Sea
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Применения метода Резонансно-Акустического Профилирования (РАП) на стадии инженерно-геологических изысканий при строительстве и реконструкции объектов на примере работ в Брянской и Калужской областях
Authors И.В. Зуйков and В.В. БединовThe report briefly overviews the theory and Applications of a Resonanse-Acoustic Profiling (RAP) method of at the stage of engineering-geological surveys at building and reconstruction of objects on an example of works in Bryansk and Kaluga areas. Problems of forecasting of processes of a karst formation and tectonic zones are considered at construction surveys, and uses of this data at designing of buildings and structures.
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