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Engineering and Mining Geophysics 2021
- Conference date: April 26-30, 2021
- Location: Online
- Published: 26 April 2021
41 - 60 of 184 results
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Magnetic and GPR Survey of The Belousovsky Copper Mine of The Bronze Age, Kargalinsky Mining and Metallurgical Center (Orenburg Region)
Authors V.V. Noskevich, N.V. Fedorova and L.A. MuravyevSummaryThe paper presents the results of micromagnetic and georadar surveys at quarry of the Belousovsky mine. As a result of geophysical studies, it was revealed that local positive magnetic anomalies are observed along the sides of the ancient quarry of the Belousovsky mine. These anomalies are associated with soils excavated from the quarry. According to the GPR data, the bottom topography of the ancient quarry was determined during its operation in the Bronze Age, and a three-dimensional model of the mine was built. Based on the results of the study, it is possible to estimate the number of excavated soils and the amount of ore mined. GPR, micromagnetic survey, Belousovsky copper mine, Bronze Age
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Seismic-Density Fault-Block Model of Lithosphere Upper Part of The South Kara Depression Along Geotraverse 3-AR
Authors V.S. Druzhinin, N.I. Nachapkin, V.Yu. Osipov and L.A. MuravyevSummaryFor the first time, a fault-block seismic-geo-density model of the upper part of the lithosphere was compiled along the DSS 3-AR profile in the region of the southern segment of the Kara depression (69.5°-75.5°N; 54°-78°E). The heterogeneity of the crystalline crust deep structure has been established; the southern part of the geotraverse differs significantly from the northern part. A conclusion is made about the northern limit of the Ural fold system in the latitude interval 71.5°-72°. A transitional layer with a thickness of 4 to 9 km was distinguished between the lower crust and the upper mantle.
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Ice Activity Effects in The Seabed Relief in The Eastern Part of The Barents Sea
Authors N.A. Shumskaya, A.P. Demonov, A.N. Prokin and A.G. RoslyakovSummaryThe purpose of the abstract is to study the forms of meso-and microrelief formed as a result of glacial activity. Mapping of the seabed relief was made with the multibeam echosounder. Relict landforms of glacial genesis formed at the early stages of ice cover degradation (both accumulative and erosion), as well as those formed in subaqueous conditions under the impact of icebergs, were considered.
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Experience of Using UAV Photogrammetry in Archeology Tasks
Authors E.V. Balkov, Y.G. Karin, O.A. Pozdnyakova and D.A GoglevSummaryUsing the example of the archaeological sites Aul-Koshkul-1 and Novaya Kurya 1, located in the Novosibirsk region, the effectiveness of aerial photography from a UAV is shown when archaeological objects are weakly expressed in the relief. An effective method for obtaining maps of the relative heights of the day surface is described, which made it possible to identify new archaeological objects on the territory of the studied sites.
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Forecasting Changes in The Water Level in The River Based on Long-Term Observations of Influencing Factors
Authors V.L. Shapovalov, A.V. Morozov, D.R. Tagirova and V.A. YavnaSummaryThe paper presents the results of a long-term analysis of various factors affecting changes in the hydrological situation in the river bed. To create a predictive model, the obtained dependencies were used, which make it possible to predict with high accuracy the change in the water level in various meteorological conditions. The results of the forecast can be used to prevent emergencies arising at transport infrastructure facilities located in close proximity to river beds.
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Development of Geological Hazards Ranking System on The Arctic Shelf
Authors O.V. Erzh, L.S. Chepigo, A.G. Roslyakov, A.P. Demonov and D.I. DamyanovichSummaryThe purpose of this abstract is to develop a ranking system for assessing geological risks the during construction and operation of oil and gas wells on the Arctic shelf using machine learning algorithms. In the course of the work, two statements of the methodology of the geological hazard ranking system were considered - as a regression problem and as a classification problem, the quality of the algorithms was compared, the optimal algorithm was selected for ranking geological hazards according to the degree of risk.
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GPR Method for Studying The Drainage Properties of Sands
More LessSummaryGPR technology was developed and applied to study water drainage in structural layers of sand, prepared for compaction during the construction of the roadbed. The performed measurements and calculations demonstrate the ability to determine the drainage properties of sands and the redistribution of water along the depth of the layer depending on time.
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Features of Acoustic Emission Caused by Gas Filtration Through Highly Permeable Porous Media
Authors E.A. Marfin, M.N. Ovchinnikov, A.A. Abdrashitov, E.A. Plakhova and A.R. GalimzyanovaSummaryMechanical loading and filtration of fluids in porous media leads to acoustic emission. The spectra of such signals depend on the loading mode and the physical properties of porous media. In this work, we investigated the acoustic emission spectra of highly permeable porous samples during filtration through air. The characteristic features of the obtained spectra have been established. In particular, it was shown that the recorded noise signal at low Re numbers consists of individual pulses with a duration of about 25 ms, uniformly distributed in frequency. With an increase in the filtration rate, these pulses are concentrated near the characteristic peaks, which is what determines the final spectrum of the porous sample. The obtained new experimental data can be used in the development of a unified theory of noise generation in saturated porous media.
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Investigation of a Potash-Magnesium Salt Deposit to Refine The Geological Structure Using Innovative CSPD and RTH Methods
Authors S.A. Shevchenko, G.N. Erokhin and E.V. AnokhinaSummaryThe deposits of the Upper Permian halogen formation are weak scattering objects. Therefore, it is especially important for delineating ore bodies to use technologies that allow you to accurately identify such zones. The complex interpretation of the seismic data processed using the innovative RTH method, reflected and scattered waves obtained using the CSPD method is performed. As a result, the geological structure was refined to track the areal distribution of the polygalite mineralization layer and to predict possible local structures.
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Engineering-Geological Interpretation of The Acoustic Structure of The Diamicton Strata of The Barents Sea Shelf
Authors S.I. Rokos, S.N. Kulikov, V.A. Skurikhin and P.V. SokolovSummaryDiamictons are mainly massive clay-silty clay with coarse-grained inclusions. There are two types of sections of diamicton formations in considered region. The first type is composed of overconsolidated stiff to hard soils. These formations have a ripple-mottled acoustic structure on shallow seismic time sections. Normally consolidated sediments represent the second type. In the upper part of sections there are very soft to soft varieties, which are gradually replaced with depth by firm, and then by stiff to very stiff ones. The similar deposits have an acoustically transparent structure. It is assumed, that these are Upper Neopleistocenian and Lower-Middle Neopleistocenian marine, glacial-marine sediments. Overconsolidated sections were formed by younger glacier pressure. The mottled acoustic structure of overconsolidated sediments is due to reorientation of particles and mineral aggregates under the pressure of the glacier, as well as an increase in the concentration of coarse-grained inclusions due to a decrease in the total volume of the soil mass as a result of compression. Normally consolidated sediments are developed in areas that were not covered by a glacier, or where it did not touch the bed with its bottom. Due to this, the described soils avoided overconsolidation and retained their original acoustically transparent structure.
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Experience in Using Seismic Tomography to Solve Problems Related to The Elimination of Accidents in The Construction of Underground Structures
Authors K. Dorokhin, O. Boiko and A. SuharevSummaryThe main object of seismic and acoustic research during construction is a rock mass, which is understood as a separate part of the geological environment, located in the sphere of engineering influence. This part of the environment is investigated in order to establish the conditions for the construction work and the subsequent operation of the erected structures. Identification and assessment of the formed weakened zones in the host massif is a necessary stage in predicting subsequent precipitation and deformations of engineering structures located in the zone of influence of construction works. The results of geophysical studies are the basis for the development of measures to eliminate adverse factors and processes in the soil mass, and also serve as an important tool for monitoring the effectiveness of measures already taken.
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Refracted Wave Method in Complex Refractive Boundary Configuration Research
Authors V.Y. Bobrov and I.U. GerasimovaSummaryThe results of seismic studies within an area with a complex boundary configuration, confined to the top of bedrock in interval of upper part of the section are presented. Mathematical simulation was carried out to identify the effects influencing the changes in characteristics of elastic vibrations caused by the curvature of refracting boundary. Examples of testing non-formalized digital processing in order to minimize discrepancies between field data and simulation results are given.
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The Use of MTS Electrical Exploration in Identifying Promising Oil-Saturated Zones, Determining their Physical and Geometric Characteristics on The Example of The Karazhanbas Severny Field
Authors A.R. Omirbayeva, G.K. Umirova and A.B. AytasovSummaryThe abstract presents the results of experimental studies by the method of magnetotelluric sounding (MTS) performed on the territory of the Karazhambas Severny deposit. It is shown that the use of multi-instrument 5th generation of a sufficient amount of a priori geological and geophysical data allows to obtain representative material, allowing you to successfully solve a range of problems associated with the search for hydrocarbon deposits, including a selection of promising oil-saturated areas and the determination of their physical and geometrical characteristics.
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The Main Complicating Factors in Conducting and Processing Filtration Testing of Single Wells
Authors S.N. Tagiltsev, V.S. Tagiltsev, S.V. Surganov and A.A. KurichenkoSummaryWhen carrying out and interpreting data from experimental filtration works in single wells, various complicating factors often appear. At the stage of data interpretation of filtration tests, on the time graphs of tracking the decrease (increase) of the dynamic level, features are recorded that differ significantly from the "classical" type of time dependences. This article focuses on the complicating factors associated directly with the well, the state of the wellbore space and the hydrodynamic characteristics of the formation. These features include: the effect of wellbore capacity; significant technogenic changes in filtration properties in the near-wellbore zone of the formation; violation of the linear filtration law near the well. It is necessary to analyze and use the features of the geological environment and very carefully carry out the interpretation of the data from single filtration tests with the obligatory consideration of complicating factors.
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Clarification of The Characteristics of Productive Horizons in The Cretaceous and Jurassic Complexes of The Karazhambas Deposit in Order to Assess The Filtration and Reservoir Properties and The Nature of Saturation
Authors A.G. Arturov and G.K. UmirovaSummaryThe article presents the results of experimental studies of the methods of the geophysical survey of wells, performed on the territory of the Karazhambas field. Based on the materials of petrophysical and geophysical studies, petrophysical and reservoir-filtration features, texture-structural characteristics were clarified, and a unified method for interpreting the geophysical survey of wells was developed, which allows us to identify promising reservoirs.
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Development of a Model of a GPR Section of a Frozen Rock Mass with a Crack
Authors K.O. Sokolov, R.A. Dyagileva and P.A. PopkovSummaryThe results of research on the development of a wave field model obtained during the study of frozen rock mass with crack by GPR are presented. The presence of cracks significantly affects the physical and mechanical properties of rocks, which must be taken into account when planning mining operations and the construction of mining facilities. To establish the peculiarities of manifestation of cracks in the GPR data studied materials of long-term fieldwork in developing areas of alluvial diamond deposits ("Almazy Anabara"), the basic building blocks of GPR and presented in single formula. This formula implemented in program in CKM Matlab, and the results of its performance are compared with simulation results in the system of gprMax. The comparison of the obtained results showed the identity of structure of the GPR wave fields. The correlation coefficient between the obtained matrices, without taking into account the low-amplitude values of multiple re-reflections was 0.91. The conducted studies confirmed the possibility of mathematical description of GPR wave field obtained by probing an array of frozen rocks with crack. The high correlation coefficient showed the adequacy of the developed model of radargram which will be finalized taking into account the radiation patterns of existing GPR.
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Methodology for Studying the Fracturing of Rock Massifs at Different Stages of The study of Mineral Deposits
Authors S.A. Korchak, I.V. Abaturova, I.A. Savintsev and L.A. StorozhenkoSummaryThe assessment of the stability of the pit walls is the basis for the safety of field development. The stability of the rock mass is determined by many factors, among which one can distinguish: physical-geographical, structural and tectonic, composition and properties of rocks, hydrogeological, dominant from this list are structural-tectonic. This article describes in more detail the approach to the study of fracturing, since it is this factor that is often the key in choosing the schemes for calculating the stability of the sides of open-pit mines. On the example, the methodology of studying the fracturing of the massif is considered, taking into account the stage of studying the deposit of solid minerals, the geological and structural features of the massif and the complexity of the engineering and geological conditions of development.
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Application of Capacitively-Coupled Resistivity Technology for Karstological Studies at Design of Linear Objects
More LessSummaryOn the basis of field studies, the effectiveness of capacitance technology has been established for studying layers overlapping karst sediments and the upper part of karst levels. Observed data can be basis for conducting more detailed karstological studies.
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The First Results of Electrical Resistivity Tomography on a Kimberlite Pipe in The Yakutsk Diamond Province
Authors V.V. Olenchenko, E.M. Goncharov and Ya. F. KovalskiySummaryThere are results of the electrical resistivity tomography of the Syuldyukarskaya kimberlite pipe in Yakutia. The main goal of this work is to assess the capabilities of the method when working in permafrost conditions and overlying low-resistivity polarizing rocks. The pipe has the form of a steeply dipping stratum limited along the strike. Fieldworks were carried out a parallel profiles network, two-dimensional arrays were combined into a three-dimensional dataset, the automatic 3-D inversion was performed. The resistivity sections and in the 3-D model seen that the pipe distinguishes by a steeply dipping low resistivity anomaly and an anomaly of increased polarizability from the lying side of the stratum. The induced polarization (IP) anomaly is more intense in the upper part than on the pipe deeper that is associated with abundant pyritization. The local IP anomalies in the overlying sediments are even more intense and have a stratum form. The IP anomaly has a steeply dipping stratum form in the contours of the pipe. The electrotomography has shown high efficiency and is recommended for use in studying geological sections within magnetic anomalies.
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Complex of Geophysical Research for Studying Geological Structure of Zhezkazgan Ore Region in Kazakhstan
Authors Zh.K. Aidarbekov, S.A. Istekova and H. GlassSummaryThe result of research shows the possibility of complex geological and geophysical research for structural mapping of ore-promising areas and detailed study of ore control complexes of copper bearing sandstones in the Zhezkazgan region in Central Kazakhstan. The structural and tectonic structure of ore districts has been studied; The localization and morphology of differentiated intrusive arrays at depth has been established; Deep ore-controlling faults have been detected and mapped, ore control structures have been isolated in sedimentary and effusive sedimentary folding complexes; defined the spatial position of individual ore zones. Considering the complicated geological structure of the ore region under study and the significant differentiation of the formation and ores, the identification of additional criteria for the localization of copper ore is possible only with the combination of geological and geophysical methods, detailed geochemical and physical-chemical studies of rocks and ores.
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