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Engineering and Mining Geophysics 2018
- Conference date: April 23-27, 2018
- Location: Almaty, Kazakhstan
- Published: 23 April 2018
101 - 120 of 149 results
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Change of Engineering-geological Properties in Areas of Accelerated Land Subsidence
Authors V.A. Bereznev and V.V. NikiforovSummaryThe condition of terrigenous-carbonate strata in the underworked territory Berezniki is investigated. TKT assessment on physicomechanical properties is made, not favorable sites are allocated. Spatial models are constructed
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The structure of the zone for unloading the steam-hydrothermal Bolshoy-Bannoy and Pauzhetsky geothermal deposits by geophysical data
Authors D.K. Denisov, I.A. Nuzhdaev and S.O. FeofilaktovSummaryIn 2015, magnetometric, seismic and electro-prospecting studies were performed. On the sections constructed from the data of vertical electric sounding and the method of reflected waves, a horizontally layered structure of the zone of unloading of steam-hydrothermal lines is observed. Magnetometric data reveal a negative magnetic anomaly in the central part of the thermal field. Electrical exploration by the self potential method reveals a negative anomaly in the vicinity of the creek Jashhichnyj. Magnetometric data show a negative magnetic anomaly in the central part of the thermal field.
At the Pauzhetsky geothermal field in recent years we have been carrying out complex geophysical studies using modern geophysical methods (magnetometry, electrical prospecting, microseismic sounding). Data are obtained on the structure of the upper water retainer and the upper aquifer in the region of the Eastern-Pauzhetsky and Verkhne-Pauzhetsky thermal fields is specified.
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Possibility of NVSP for a Qualitative Assessment of Fracture Porosity in a Carbonate Massif
Authors U.A. Igibaev and G.K. UmirovaSummaryThe urgency of this work due to the increasing exploration activity in the carbonate massifs operated for the purpose of search of deposits of hydrocarbon raw materials. Currently, a significant amount of experimental research connected with the study of fracture porosity and fludarabine. To identify and explore the field of fracture used the analysis of parameters of seismic waves, such as an anisotropic change in the velocity, amplitude and spectrum, the splitting of shear waves and other indicators, the assessment of which is based on instructional techniques and methods specifically designed in the last decade in seismic prospecting.
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Setting Standards for Groundwater Mapping With Airborne EM: Example From Canada
Authors A. Viezzoli, A. Menghini, F. Jorgensen, A.S. Hoyer and V. KaminskiSummaryCurrent study is showing an example from British Columbia, Canada, where an area in Peace River basin was flown by SkyTEM system and then interpreted using advanced EM inversion algorithms, which in turn led to groundwater modelling carried out straight from interpretation of the airborne EM data and with usage of a-priori information.
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Assessment of the Status and Properties of Embankment Dams and Their Foundations by a Complex of Geophysical Methods
More LessSummaryThe report cited the methodology and results of integrated geophysical investigations for groundwater waterworks. The aim of the work was to determine the current state of the structures (dam, dam) and soil base. Complex geophysical studies including: seismic, geoelectrics and GPR. As a result of comprehensive research on various objects was obtained the following information: the actual geological structure of the site investigations; the position of zones of concentrated filtration; the availability and terms of occurrence of weak soils; physico-mechanical characteristics of soils in the geophysical data.
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Some Peculiarities of Using GPR for Detection of Alive Humans Under the Collapsed Buildings
Authors V.M. Yakushev, S.G. Kataev, A-G.G. Kerimov and D.S. PyadukhovSummaryThe option of using GPR for detecting alive humans under collapsed buildings is discussed. The qualitative assessment of advantages and disadvantages of this method is given. The possibility of determining not only the relative coordinates but also the spatial position of the buried object with the help of GPR data is shown.
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Assessment of Efficiency of Carrying Out Current Logging and Resistance Logging When Determining Tightness of Polymeric Casing Strings on Technological Wells
Authors N. Samanbetov and N. BerestnevSummaryIn this text authors consider effectiveness of conducting of electric logging methods: current logging (CL) and resistance logging (RL) for determination of integrity of casing strings during construction of wells at uranium fields. During the detection of integrity violation of casing strings mostly the base for decision on elimination of wells are the results of current logging. The main purpose is definition of CL and RL effectiveness in casings for checking of strings integrity, also definition of parameters influencing on the decision in elimination of wells with damaged casing strings. The results of development works on conduction of CL and RL in casing illustrated that the RL method in casing reveals integrity violation of casing strings with the most reliability in comparison with CL method.
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Results of Using Kazakhstan High-precision Electro-prospecting Equipment for Solving Ore Problems
Authors M. Jukebayev, G. Umirova and V. MarinenkoSummaryThere was shown that LLP “SPC “Geoken” along with best models of foreign electro-prospecting equipment from famous manufacturers (Zonge (USA), GDD and Phoenix Geophysics (Canada)) also successfully uses electro-prospecting equipment developed in Kazakhstan. There is some examples from real production projects completed by using this equipment.
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Vector IP Surveys for Generating Regional Targets for Porphyrycopper Exploration. New Method of Areal Electrical Geophysics
Authors M.I. Jukebaev, Luisa D’Andrea, G.K. Umirova and N.N. KonakbayevSummaryIn this article, the authors review the practical experience of applying the VIP (vector induced polarization) method for geophysical surveying of one of the properties in Central Kazakhstan in 2017. The survey results demonstrate a significant reduction in time and cost associated with performing large area surveys achieved by using special IP arrays. The surveys carried out made it possible to rapidly detect abroad area of chargeability response which was followed up by deeper penetrating DDIP surveys to test for depth extent.
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The Study of Suffusion-karst Phenomena by Using Complex of Geophysical Methods
Authors L.V. Lee and S.S. KudaibergenovaSummaryThe results of analysis of research suffusion-karst processes by complex of geophysical methods (gravity prospecting and electric exploration), satellite geodesy and laboratory studies of soils. Efficiency of the method complex was evaluated. The signs of allocation in the geophysical fields of suffusion-karst funnels was determined with the allocation of the area of intensive development of the process and determination of area with the initial stage of deformation development.
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Evaluating the Efectiveness of High-resolution Electrical Prospecting on an Example of the Gold Deposit Study
Authors L.B. Volkomirskaya, O.A. Gulevich, V.V. Varenkov and V.I. SahterovSummaryThe paper investigates the possibilities of high-resolution electrical prospecting based on the method of reflected electromagnetic waves (MREW) for preliminary estimation of the increase of reserves due to the unexplored flanks of operating deposits. Comparison of the geological section, made on the basis of exploratory drilling, with the data of the MREW profiling is given. It is shown that the use of modern equipment for MREW allows carrying out research to depths of over 170 meters, fixing tectonic faults and contacts of loose rocks, localizing karst zones, that provides the necessary information for determining traps filled with gold ore formations. The speed of the survey along with the cost of useful information obtained ensures high efficiency of the method.
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To the Question of the Possibilities of the Method of Georadiolocation for the Localization of Voids
Authors L. Volkomirskaya and O. GulevichSummaryIn the paper, on the basis of numerical modeling of the georadiolocation problem, the necessary requirements for the technical characteristics of a georadar for the detection of voids in a subsurface medium are considered. The algorithm used to solve the direct problem of georadiolocation is approximated to the actual experiment by taking into account the construction of the georadar, the source and receiver parameters, their position relative to the medium of research and inhomogeneity in it. Calculations of the spatiotemporal distribution of the field of the detected signal from a pulse source lying on the media interface with a hollow anomaly of a given geometry are presented. Based on these estimates, the dynamic range of the georadar needed to determine it is estimated. Results of georadar studies of low-contrast inhomogeneities in the form of cavities in mines using GROT 12 series georadars and their analysis based on the results of numerical simulation are presented. It is demonstrated that already at the planning stage of the experiment it is possible to estimate the required parameters of the georadar necessary for the detection and localization of the inhomogeneities of interest at a certain depth of sounding.
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Prospects for the Development of Agrogeophysics in Russia
Authors M.V. Kosnyreva and L.A. ZolotayaSummaryThe report examines the prospects for the development of a new scientific direction in Russia -AGROGEOPHYSICS. The analysis of foreign experience of application of geophysics for agricultural tasks is given. It is noted that the most widespread were various modifications of methods of electrical prospecting. According to the results of the research carried out by the authors, great prospects of magneto-prospecting and georadiolocation are shown in combination with electrical prospecting in solving soil and agroecological problems.
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Распределенная система для 3D удельного сопротивления и измерения индуцированной поляризации
Authors Ж. Бернар, Ж. Ганс, Б. Тексье and К. ТрафферSummaryA geometry free Resistivity Induced Polarization distributed system (FullWaver) has been developed for acquiring 3D images of underground structures. The system includes a set of fixed and independent receivers continuously recording the signals and a transmitter with a current recorder, GPS synchronized. The current electrode is moving in any direction and distance with respect to the receivers. The high resolution data are collected at the end of the survey for further processing and inversion with 3D software.
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Georadar Tracking Profiling for the Purpose of Searching for Underground Structures on the Territory of the Holy Trinity Holkovsky Monastery
Authors I. Abizgildin and A. KhilkoSummaryReport on the applicability of low-frequency georadiolocation for the purposes of searching for underground voids at the sizes of objects close to the limiting resolution of the method.
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GPR Technology to Determine the Thickness and Structure of Sea Ice
Authors N. Pudova, I. Vedeneev and V. PomozovSummaryNo summary available
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The experience of using of the GPR method for sludge survey
Authors V.N. Buyanov, V.M. Yakushev and O.A. TsvetsikhSummaryThe results of a GPR survey of sludge collectors which located in the Stavropol region at the Zimne-Stavkinskoye and Achikulakskoye deposits are presented. The peculiarities of the organization and the process of this work are shown. The results of the sludge volumes assessment, its liquid phase, solid phase and silt deposits, are given.
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Methods for Estimating the Damping of an Electromagnetic Wave From the GPR Data
Authors Z.B. Khakiev, V.L. Shapovalov, V.A. Yavna, M.V. Ocost and A.A. KruglikovSummaryThe paper considers various methods for determining the coefficients of attenuation of an electromagnetic wave from the data of the GPR survey, as well as a resonance method for measuring the electrical properties of soils. In the framework of classical electrodynamics, a method has been developed for determining the attenuation coefficients in the microwave range 1200–1700 MHz, based on quantitative processing of the GPR data. The application of the method to the determination of electrophysical properties provides an accuracy of 10–20%.
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