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Engineering and Mining Geophysics 2021
- Conference date: April 26-30, 2021
- Location: Online
- Published: 26 April 2021
21 - 40 of 184 results
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Control of The Process of Subsidence of The Earth's Surface by Monitoring Gravimetric Observations
Authors S.G. Bychkov, A.A. Simanov and V V KhokhlovaSummaryThe results of gravimetric studies conducted to ensure the safe development of the Verkhnekamskoye potash deposit are presented. Areas of technogenic decompression in the under-worked thickness are formed as a result of deformation of the rock mass above the mine workings. The identification of the technogenic component in the totality of the mapped anomalous objects is based on monitoring geophysical measurements. Based on gravimetric observations carried out with a certain periodicity, with subsequent processing and interpretation of dynamic gravity anomalies, it is possible to draw conclusions about the structure of the rock mass, the presence of decompressed zones and to trace their changes in time and space, to monitor the subsidence of the earth's surface. The developed technology of separation of decompressed zones into natural and man-made ones allows to increase the safety of operation of the Verkhnekamskoye field.
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Possibility of Using Surface Gravity Survey to Localize Erosional Truncation on Verkhnekamsk Potassium-Magnesium Salt Deposit
Authors V.A. Voroshilov and A.A. ZhukovSummaryThe article discusses about the possibility of gravity survey application as an ahead method to locate structural heterogeneities within productive strata of the Verkhnekamskoe potassium salt deposit. The study area is a geophysical polygon with a known anomalous geological structure in the form of erosional truncation in the salt roof. As a result of solving the direct gravity problem, it was found that a positive gravity anomaly should be expected in the place of erosional truncation. Field measurements allowed us to calculate the gravity field in the Bouguer reduction, which showed a strong correlation with the model field. The transform obtained using a 3D modification of the GEMD method best characterizes the local geological structure of the salt-mirror roof. In order to correctly solve the inverse structural problem, it is necessary to construct a petrophysical model of rock densities exiting to the saline mirror.
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Marine Electromagnetic Research for The Reconstruction of a Geoelectric Section of Azov Sea
Authors M.V. Abramov, M.G. Persova, G.M. Trigubovich and A.S. SverkunovSummaryTheoretical and experimental marine experiments were planned and conducted to estimate the resolution of the galvanic transmitter when exploring the geological structures to depths of 150–200m. The measurements were made from the surface of the water. Geoelectric models typical for Black and Azov seas were considered for theoretical research. There the experimental work was carried out later with galvanic transmitter.
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Experience in The Application of Ground-Penetrating Radar in The Cryolithozone at Oil and Gas Facilities
Authors D.V. Kopylov, S.Y. Yanin and M.R. SadurtdinovSummaryThe results obtained by the method of GPR as part of the engineering-geological surveys in areas of oil and gas industry, located in the permafrost zone. The presence of formation ice was determined by the characteristic reflection of electromagnetic waves on geo-radar sections. The presence of re-vein ice was determined from the intense diffracted waves under the body of the formation ice. The high efficiency of GPR at the stage of engineering and geological surveys when mapping dangerous engineering and geocryological processes is shown.
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Evaluation of Resolution of The Vertical and Horizontal Field Components in Airborne-TEM for The Search for Sub-Vertical Conducting and Polarizable Gold-Ore Objects
Authors A.A. Belaia, M.V. Abramov and G.M. TrigubovichSummaryOne of the main problems in exploration geophysics is the resolution of search technologies. At the same time, in order to obtain a high-quality geophysical forecast, it is very important to use modern data interpretation algorithms based on numerical modelling technology, which allow detailed reconstruction of the geometry and characteristics of objects. The article considers the assessment of the resolution of airborne-TEM when measuring the complex of vertical and horizontal components of the electromagnetic field with the A-150 helicopter system (JSC "AGR") to search for sub-vertical conducting and polarizable gold-ore objects.
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Electrical Prospecting for Ore Objects at Significant Depths
Authors A. Zlobinskiy and P. OsipovaSummaryWhen conducting electrical exploration onshore aimed at studying deep ore objects, traditional electrical exploration methods are usually used. Geophysicists most often use modifications of the TEM methods or methods aimed at studying the polarization of the environment. Both approaches have a number of disadvantages when working on deep objects. The polarizability of deep objects has little effect on the signals measured at the surface. And the TEM methods provide very poor information about 3D objects. To overcome these problems, it is necessary to use methods that are much more sensitive to three-dimensional disturbances, namely, such are the ore deposits in relation to the host environment. The most logical way out seems to be the use of methods based on vertical currents, for example, the VECS method. It is this approach that makes it possible to identify ore objects at great depths overlain by various rocks.
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The Separation of The IP and TEM Components in a Pulsed Inductive Ground and Airborne EM Surveys
Authors A. Belaya, A.V. Chernyshev, G.M. Trigubovich, A.V. Kuklin, P.V. Melnikov and M. Richer-LaflecheSummaryIt is shown that the separation of the resistive and polarizing components of the signal can be based on the use of different signal dependencies on the receiver/transmitter sizes or its geometry. So, IP signal is much stronger decreases in relation to the induction component with increasing size of the receiver in the center of the loop, or with offset increasing, or with increasing the height of the receiver in airborne surveys. Interpretation of signals from two different sizes or geometries of installations significantly reduces the equivalence and allows you to separate the resistive and polarizing modes of the signal more precisely. If there are no obvious signs of polarization, its presence can be determined only using double measurements, otherwise the signals can be erroneously interpreted. The results of experimental studies using systems with dual measurements are presented.
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Methodology of Badanin A.I. for The Production of Electrotomographic Studies in Engineering Surveys and Geotechnical Monitoring of Transport Ttunnels
Authors K.V. Romanevich, A.D. Basov, K.A. Dorokhin and O.V. BoykoSummaryAlexander Badanin worked in the research department of JSC NIPII Lenmetrogiprotrans from 2003 to 2019 as a senior researcher and his main activity was electrical exploration. During this time, he developed a non-standard methodology of electrotomographic observations, which was used both when working from the surface and in underground workings. A feature of this technique is a certain order of the supply and receiving groundings movement along the electrotomographic profile, which makes it possible to obtain an integral geoelectric section without using multi-electrode streamers and a large number of electrodes. This procedure allows to significantly reduce the time of field measurements and to quickly obtain 2D electrical tomography data for an initial assessment of geotechnical conditions and making a decision on the need to use more detailed methods of geophysics and geotechnics. Electrotomography according to this technique is a simplified version of the electrotomography (alternative electrotomography) and is distinguished by its mobility and less labor costs during field work. A clear advantage of the given express method in comparison with standard methods (using multichannel streamers) is large spacing, which allows, although roughly, but integral for a large rock mass, to estimate the distribution of electrical resistance in the section.
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Hazardous Geological Processes: Their Role in The Formation of The Sedimentary Cover of The Far Eastern Seas and Their Impact on The Economic Development of The Shelf
SummaryThe report presents the characteristics and spatial distribution of dangerous geological processes on the shelf, continental slope and in the near-slope area of the World Ocean in the Far East, within the economic zone of the Russian Federation. A classification of these processes is given, their attributes and methods of study are characterized, as well as their contribution to the formation of the modern appearance of the seabed and the distribution of bottom sediments. The issues of creating the Legend of the "Map of dangerous geological processes of the Far Eastern seas" at a scale of 1: 5,000,000 are discussed, and a model of the map itself will be presented. It is emphasized that the creation of such a map for the first time will help to more rationally approach the design of engineering facilities, including for the oil and gas industry, at the bottom of the Far Eastern seas
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Application of 3D Aeismic for Justification and Characterization of Geological and Geophysical Conditions in Mmining Geology
Authors A.N. Sirazhev, S.A. Istekova and R.G. TemirkhanovaSummaryThe article outlines application of seismic exploration in the field of mining geology in complex geological conditions of Kazakhstan. The justification and characterization of geological and geophysical conditions for experimental 3D seismic surveys implementation for the copper sandstones deposits of the Zhilandinsky group located in the Karaganda region of Central Kazakhstan are presented. The tasks are defined and the methodology of high-resolution 3D seismic survey is developed and tested. Special high-resolution 3D processing and interpretation helped to obtain high-quality seismic materials and to highlight the structural and tectonic structure of study areas, identifying and refining ore-controlling structures, detecting and deep mapping of tectonic faults, volumetric mapping of intrusive bodies. The main keystones during the modeling process based on the results of a comprehensive interpretation of three-dimensional seismic survey together with geological and geophysical data, which will significantly increase the reliability coefficient of forecasting ore deposits, are indicated.
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Analysis of The Results of Comparative Tests of Ground Penetrating Radar Equipment on The Experimental Section of The Highway
Authors A.M. Kulizhnikov and R.A. EreminSummaryThe results of comparative tests of various designs of georadars on an experimental section of a road are presented. Based on the results of comparative tests, an analysis of methods for determining the thickness of pavement layers, identifying signs and locating weakened zones is presented. The effective methods of work performance and the required designs of ground penetrating radar equipment have been determined.
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Application of 3D Modeling of Electromagnetic Sounding Data to Identify Zones of Sulfide Mineralization of Copper-Porphyry Type in The Territory of Northern Kazakhstan
Authors A.Y. Belova, M.S. Shkirya, M.G. Persova, A.P. Sivenkova, T.S. Shoykhonova and Y.A. DavydenkoSummaryImpulse electrical prospecting was used in prospecting and exploration work in the north of Kazakhstan to delineate hidden zones of sulfide mineralization of the copper-porphyry type. The main task of the work was aimed at studying the Kyzyl-Sor depression and delineating anomalous zones of sulfide mineralization. The way to solve this problem was the complex application of the apparatus for one-dimensional and three-dimensional modeling of electromagnetic sounding data. The abstracts provide a comparison of the simulation results with each other and their comparison with a priori geological information. Conclusions on the accuracy of 1D and 3D modeling are given. The conclusion is made about the presence or absence of sulfide mineralization directly under the Kyzyl-Sor depression itself.
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Geophysical Methods Within The Complex of Investigations Aimed at Studying Outburst Glacial Lakes on The Example of The Progress Lake (Larsemann Hills oasis, East Antarctica)
Authors S.D. Grigorieva, E.R. Kiniabaeva, M.R. Kuznetsova and M.P. KashkevichSummaryOutburst floods of glacial lakes are well-known in many regions of the Earth where alpine or cover glaciation takes place. Studying these phenomena remains relevant not only for purposes of fundamental science but also from the practical point of view due to their possible catastrophic consequences: destructive water streams and hidden water flow channels within the glacier bodies. In particular, such investigations are actual for ensuring the safety of logistic operations at the polar stations. Within this research, we show results of GPR and experimental self-potential method survey performed at the Progress Lake (Larsemann Hills, East Antarctica) during the field season of 2010/2020 and complemented with hydrological observations and UAV aerial photography. We conclude that an outburst flood does not happen rapidly, but is preceded by filtration of the water through the snow-ice dam. Growing humidity within the dam can be mapped due to the increasing amplitude of the electromagnetic wave and negative anomalies of the self-potential field.
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Experimental and Methodological Work to Identify Zones of Sulfide Mineralization of The Gold-Porphyry Type in Primorye
Authors S.A. Tereshkin, M.S. Shkirya, M.G. Persova, S.V. Yakovlev, P.G. Biryukov, A.A. Gilishev and Yu.A. DavydenkoSummaryImpulse electrical prospecting was used during prospecting and exploration work in Primorye near the Krasny deposit to search for gold-porphyry ore bodies with a magical mineralization. The main task of the work was aimed at a detailed study of the area near the quarry. The way to solve this problem was the complex application of the apparatus for one-dimensional and three-dimensional modeling of electromagnetic sounding data. The abstracts compare the simulation results with each other. The efficiency of grounding the generator line feed electrodes directly into ore bodies with an increased concentration of sulfide mineralization is substantiated to obtain a high-quality signal. It is concluded that 3D inversion is more efficient than 1D inversion for searches for vertically oriented bodies.
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The possibilities of geometric 3-D inversion for processing the UAV-TDEM data
Authors M.G. Persova, Yu.G. Soloveichik, D.V. Vagin, A.P. Sivenkova, A.S. Kiseleva and M.G. TokarevaSummaryThe article is devoted to the assessment of the possibilities of using geometric 3D inversions of electromagnetic time domain data measured by induction receivers moved using UAVs (UAV-TDEM). The electromagnetic field is excited by a long grounded electrical line, and the survey is carried out over profiles parallel to it. The geometric 3D inversion proposed for use was developed for processing airborne electrical survey data using helicopter platforms and is based on a joint search for electrophysical and geometric parameters of a geoelectric model using block structures. The study of geometric 3D inversion workability is carried out on synthetic data generated for a geoelectric model containing local targets at different depths overlapped by inhomogeneous conductive layer. Modeling is carried out taking into account the characteristics of the UAV system, obtained on the basis of analysis of practical data measured in one of the areas of Eastern Siberia. The results obtained showed that, on the one hand, the considered UAV-TDEM technology with a source in the form of a grounded electrical line makes it possible to detect local objects at depths of up to 100 m (and, possible, more) even in conditions of a heterogeneous and sufficiently conductive overburden layers. On the other hand, the considered approach to geometric 3D inversion makes it possible to stably determine the position in plan and the depth of local objects for the UAV-TDEM technology.
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High Space Density Time-Domain Electromagnetic Scanning for Ore and Engineering Exploration
Authors A. Belaya, A.V. Kuklin, G.M. Trigubovich and A.V. ChernyshevSummaryDescription of High Space Density Time-Domain electromagnetic (EM-HSDTD) technology, based on transient electromagnetic method (TEM), performed in movement is provided. EM-HSDTD is used in solution of different geology-engineering tasks with depth up to 200 meters. Due to highest measuring points density EM-HSDTD technology provides both high accuracy of TEM signals registration and continuous imaging of geological medium. Examples of the EM-HSDTD usage in solving engineering and ore problems are given.
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Development of Scenarios for The Use of a Multi-Agent Complex of Robotic Systems in Tasks of Operational Oceanography
Authors R.O. Morozov, A.M. Maevskiy and A.E. GorelyiSummaryThe challenges of modern oceanography are complex and multifaceted. The task of synthesizing a universal apparatus that would cope with all the difficulties is extremely difficult. For an optimal solution to the problems facing this area, it is necessary to use multi-agent complexes of robotic systems. As a result of the analysis of the available devices, their functions, the tasks they perform, as well as highlighting the patterns of their use, we have proposed two typical scenarios for the use of a multi-agent complex. The existing backlog of NPP PT Okeanos JSC, as well as many years of experience in the development and operation of marine robotic systems allow developers to be confident that with the proper level of support from potential customers, the application concepts described by the authors are feasible in practical realities, and not only on paper and the results of theoretical calculations.
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Geophysical Methods in The Study of The Ancient Metallurgical Complex in The Western Baikal Region (Section Barun-Khal II)
Authors S.Yu. Davydenko, Yu.A. Davydenko, A.Yu. Davydenko, A.V. Parshin, S.A. Tereshkin and S.V. SnopkovSummaryIn 1977, on the western coast of Lake Baikal, near the village of Shara-Togot, Olkhon region, a monument to the ancient metallurgy of iron Barun-Khal II was unveiled. According to the radiocarbon method, the age of the monument is 2180-1750 years. The area, promising for the detection of objects related to ancient metallurgical centers, is quite large, several tens of kilometers in length and several kilometers in width. In this regard, the search for new archaeological sites by traditional methods is difficult. A possible way to optimize searches, as well as study archaeological sites without excavating them, are geophysical methods - magnetic prospecting and electrical prospecting. In this case, surveys were carried out on the reference object by methods of ground and UAV magnetic prospecting and electrical prospecting. Also, modern 3D-inversion of magnetic and electromagnetic imaging was performed. This made it possible to evaluate the effectiveness of each of the methods, to compare the reliability and information content of the observed data and the resulting 3D models of the hidden object. In this work, on the example of one of the objects of the Barun-Khal II monument, the results of a complex of geophysical research are analyzed, including ground and UAV-magnetic surveys, electrotomography (Skala-64 equipment).
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Analysis of Opportunities Spectral Method for Processing Hydromagnetic Survey
Authors K. Kuznetsov, I. Lygin, A. Bulychev and E. KiryukhinaSummaryMagnetic surveys are commonly used for solving variety of geotechnical and geological challenges in offshore areas, jointly with a set of other geophysical methods. The most popular technique employed is differential hydromagnetic surveying with towed magnetometers. This topic is dedicated to analysis of approach for deriving magnetic anomalies and accounting for diurnal variations in differential hydromagnetic surveys based on the frequency (spectral) representation of the measurements. Estimates made on model examples showed that accuracy of the field reconstruction using this method is comparable to the accuracy levels of modern marine magnetic surveys (±1-3 nT).
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Improving The Technology of Mine Seismic Exploration
Authors A.M. Prigara, V.A. Voroshilov, A.A. Zhukov, R.I. Tsarev and I.Yu. PushkarevaSummaryThe article describes software solutions that improve and accelerate both the process of field operations by the SWSR method and the stage of seismic data processing. The developed EJ program controls the TELLS-3 data acquisition software, allows keeping the field log, saving the geometry and features of the survey system. The FastMineProc program designed to calculate geometry using the information from the tables created by the EJ program and to perform express processing of data by the SWSR method. The main feature of the program is the presence of two specific procedures - the separation of reflections and the combination of sections for the upper and lower half-spaces into a combined section. Further developments will be aimed at obtaining a consolidated depth section directly during field works.
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