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Engineering and Mining Geophysics 2018
- Conference date: April 23-27, 2018
- Location: Almaty, Kazakhstan
- Published: 23 April 2018
81 - 100 of 149 results
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Deep Resistivity and Ip Tomography for Ore Exploration
Authors V.A. Tarasov and V.L. LukhmanovSummaryWe discuss some aspects of methodology and instrumentation for pretty deep (a few hundred meters) resistivity and IP tomography. Deep IP tomography is quite often needed for the efficient exploration of some types of ore deposits: copper-porphyry, gold-bearing, kimberlites, uranium etc. The automated system (ASET-IP) for poledipole IP electrical tomography is presented. The ASET-IP tomography system is based on an active current cable assembly and a remote control switchboard that provide with fully automatic measuring process. Some results of application of deep IP tomography for exploration of gold-bearing mineralization, kimberlite pipe, uranium-bearing ore and polysulfide mineralization are presented as an example. Joint use of ERT and TEM sounding is also discussed.
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The Results of Application of Pulsed Electrical Prospecting in Search for Deposits of Ore Minerals in the Mountain Altai
Authors Yu.A. Davidenko, N.A. Aikasheva, A.S. Bashkeev, A.Yu. Faustova and D.V. BogdanovichSummaryDuring the period from 2015 to 2017 the technology of electromagnetic sounding and induced polarization (EMS-IP) was used in the search for polymetals on Novokuznetsovskaya area and ore gold on Ishinskaya area in Mountain Altai. Whithin two field seasons of 2015–2016 an exploration consisted of 600 km was conductied on Novokuznetsovskaya area. 3D modeling of non-stationary electromagnetic fields were carried out to determine the anomalies of induced polarization corresponded to zones of continuous and disseminated sulfidization at depths of up to 700 m. According to the forecast 26 wells were drilled in Novokuznetsovskaya area where 24 of which confirmed the presence of sulfides and in 11 wells contain ore intervals with minerals of the polymetallic association. On the Ishinskaya area, the field work was carried out during 2016–2017 with the total length of the profiles about 27 running kilometers. In this area, 13 wells were drilled. 12 wells confirmed that the indused polarisation anomalies were caused by the presence of sulfides and gabbroid bodies with impregnated pyrite. The EMS-IP technology demonstrated high efficiency in the overall complex of search methods. According to drilling data the reliability of forecast of sulfide mineralization zones separation was about 91%.
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Detailing of tectonic structures of tension and compression according to gravity prospecting
Authors S.N. Tagiltsev, L.A Bolotnova and V.S TagiltsevSummaryIn the field of modern tectonic stresses, at the intersection of multidirectional faults and faults of different kinematic type, tensile and compression zones arise which are often contrasting in their density properties. The stretching zones should be studied for solving the problems of engineering geology, as well as for searching in an array of rocks of aquiferous areas. Geodynamic (tectonic) stress state of the upper part of the earth crust is manifested by the presence of the main normal stresses, which, as a rule, exceed geostatic stresses from the rock weight. From the perspective of hydrogeology, sections of extension are the most waterbearing; they contribute to the formation of high filtration properties at the local section of rock massif. Modern fulfillment of the complex of geophysical, geodetic, and hydrogeomechanical investigations allows to reveal zones of tension and compression at the stages of prospecting and exploration of deposits. The application of gravity prospecting methods on sections of rock massifs with a known geological structure showed the high efficiency of geophysical methods for detailing the structure of the nodes of tectonic disturbances.
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Algorithms of Processing and Visualization of Data of Remote Sensing Lands for Monitoring of Ecological Processes
Authors S.G. Kataev, M.Ju. Kataev and A.K. LukyanovSummaryThe main problems arising at extraction of information from data of remote sensing of Earth and the ways of their decision realized in the system of processing and the analysis of data developed in the Center of space monitoring of Earth (Tomsk state university of control systems and radioelectronics) are considered in this paper. TUSUR
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The perspective of the Šventoji River beaches (NE Lithuania) in context of some geophysical investigation results
Authors R. Morkunaite and R.M MorkunaiteSummaryIt is investigation on beaches of NE Lithuania territories River Šventoji (in Anykščiai town) using geo-scanner. The result is received about suitable or not suitable beaches near River Šventoji for human health.
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Features of Engineering-geological Conditions, Determining Developments of Chromite Deposit “Saranovskoe”
Authors E.A. Zvonarev and I.V. AbaturovaSummaryThe article considers the specificity of the engineering-geological conditions of the developed chromite field “Saranovskoe” in the Perm region. The conditions for the formation of this field, its geological and structural position, the material composition of the enclosing rocks and ores, determined the presence of factors that determine the physical and mechanical properties of the rock mass and its heterogeneity, which are an important characteristic of the safe location and operation of the mountain production.
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Characteristics Electromagnetic Waves of Gpr Data for Study of Hidden Cavities in the Engineering Objects
Authors S. Danilev and N. DanilevaSummaryIn this work considers the structure peculiarities of the wave elektromagnitnykh fields in the study of hidden cavities by GPR. On the basis of theoretical and physical modeling are investigated anomalous effects in the wave fields from cavities. Shows different types of manifestation of hidden cavities in the engineering objects.
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Multidimensional Processing of the Airborne EM Data in the Complex Media
Authors M.G. Persova, Y.G. Soloveichik, D.V. Vagin, P.A. Domnikov, D.S. Kiselev, Yu.I. Koshkina and E.I. SimonSummaryThe paper proposes an approach to multidimensional geometric (parametric) inversion of the airborne EM data in the time-domain in the presence of the conductive lateral overburden inhomogenities with the significant altitude variations of the surface relief and subhorizontal surfaces between the layers of the geological medium. The solution of forward problems and calculation of the impact field of the geoelectrical model parameters are performed with the use of the finite element method. The possibilities of the proposed approach are shown on synthetic data for the multilayer geoelectrical model containing the target objects with the different geometry: a subvertical object and an object with the tube form, beneath a conductive lateral inhomogeneous overburden in the condition of the significant altitude variations of the surface relief. The geoelectrical model was constructed as a generalization on the basis of the results of the airborne EM data interpretation obtained in several areas. The results of the numerical experiments show that the proposed approach makes it possible to detect and delineate the target objects in the case of a relatively low impact from these objects to the receiving signals in comparison to other 3D-inhomogenities including the ones overlapping the target objects.
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Maintenance of Conditions of Construction of Highways in Areas of Development of Permafrost by Engineering-geological Data
Authors I. Savintsev, I. Koroleva, I. Abaturova, L. Storozhenko and I. KovyazinSummaryThe intensification of natural resources exploitation entailed highways construction necessity. In areas of perennially frozen rocks development exogenetic geological processes influence over the highways operability and can lead to accidental events. Therefore it is necessary to provide projection, construction and operation of roads with correct engineering-geological data. For these purposes the operational analysis methods(decryption of satellite images), geophysical methods (electroinvestigation) and engineering-geological methods are used. Satellite images decryption allowed to receive information on geocryologic processes distribution. At the same time development problems of a detection technique of the geocryologic phenomena, definitions of characteristics of their activity and borders of distribution were being solved.
Further geophysical and engineering-geological methods are connected. As the main geophysical method the electroprospecting method of electric intubation was chosen. In a related move tngineering-geological shooting is i carried out. On development sites of rmassive wedge ice the well-drilling and thermometric researches are planned.
Satellite images decryption allowed to allocate sites of processes development , their sizes, danger of occurrence and to designate the sites of continued more precise research methods.
Geophysical surveys were concentrated on development sections of subsurface ice. At a qualitative interpretation stage the issues of space variation nature of electric properties of the environment were resolved, the cuts of apparent resistance characterizing the electric properties change of rocks on depth were received. As a result of an methods’ integration the engineering-geological conditions of the highway were studied, the range of engineering-geological and geocryologic processes development is defined, their development scales are established and an influence assessment of a highway external environment is given.
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Results of Applying Self-potential Method, Resistivity Logging and Electrical Resistivity Tomography for the Localization of Filtration Zones in the Sides of the HPP Headpound
Authors V.A. Platonov, P.S. Kolichko and V.Z. PopovSummaryApplication of integrated geoelectric methods: self-potential method, resistivity logging and electrical resistivity tomography for detection and localization of filtration zones in the headpound of HPP. Area self-potential measurements were performed as well as an experiment with salinization of the headpound with monitoring ERT measurements and borehole resistivity measurements.
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Experience in the Application of Geophysical Research Methods in Engineering and Environmental Surveys for Quarrying
Authors I. Savintsev, L. Storozhenko, I. Petrova and E. NugmanovaSummaryIt is rational to apply a complex methods of a geological basis studying for carrying out engineering-ecological researches in borders of the anthropogenic broken territories while developing design solutions of strip-pit developments elimination. The usage of the vertical electric intubation results and electric profiling by the median gradient method for studying the nature of specific electrical resistance distribution in the vertical and horizontal directions, in conjunction with well-drilling results and testing for underground waters inflow allowed to characterize hydrogeological conditions of the research site. In terms of research results interpretation filtrational parameters of the bottom and boards of the liquidated strip-pit are estimated, sites of the wet or water-logged zones in the rock massif are localized, the power of accumulated technogenic subsoils, the existence of the screen and sites of the increased filtration are estimated. The expected calculations executed with account for ground thickness properties in the liquidated pit and hydrogeological parameters of the research site allowed to obtain data on underground waters protectability from pollution. Work integrations confirm the results’ reliability and allows to use them under developing design decisions on the pit elimination.
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Assessment of Risk of Development of Contingency Situations on Railway Tracks
Authors I. Abaturova, I. Savintsev and S. KorchakSummaryThe stable state of the rock massif is defined by its fracture structure, and a possibility of blocks’ displacement.
For risks reduction of downfall formation it is necessary to estimate jointing degree of the rock massif and influence of technogenic earthquake vibrations. Assessment is based on carrying out the following types of works:
Engineering-geological mapping of the rocky massif includes documentation of cracks on express platforms. Seismic researches by measurement method of earthquake vibrations from the passing trains and blasting.
On the basis of jointing documentation it is established that the rock massif is broken into blocks of different forms. In upper sections clumpy and columnar structures are predominant, in the bottom sections - flake stones.
The columnar structure is the most dangerous one.
While processing results of crack bedding elements the three main systems of cracks are allocated.
The registered speed rates of subsoil earthquake vibrations during trains passing and carrying out of blasting are much less than admissible speed rate and also do not break stability of the rock massif of a slope.
The analysis of the performed works results allowed to divide sites on 3 danger categories: approximately safe, dangerous and very dangerous.
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Mapping Taliks in the Zones of Development of Permafrost With the Use of a Complex of Methods (on the Example of Mineral Deposits)
Authors I. Abaturova, I. Savintsev, L. Zudilina, L. Storozhenko, I. Koroleva and O. BorisikhinaSummaryBorders’ establishment of talik is the major task at all stages of studying of any engineering object. The solution of the matter assumes the stage-by-stage solution of a task by the principle “from the general to the particular” using a complex of methods such as landscape cryoindication, land geophysical surveys and thermometric researches.
On the results of multispectral space pictures decryption Landsat it is established that the central and peripheral parts of the natural occurrence are characterized with a surface existence of thawed rocks, northwest and southeast flanks of the field are characterized with frozen rocks.
Based on interpretation results of geophysical data the talik zones’ situation in the plan and a section is specified. At the third stage measurements of temperatures in wells are executed. On the results of which it is established that frozen rocks are characterized by continuous extention up to the depths of 80–240 m and have a double-layer structure. The sole of a sublayer has the symmetric character relative to central part of the field, rising to field’s flanks.
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GPR Surveys of Lake Vodoprovodnoe Near the White Sea Biological Research Station of Moscow State University
Authors K. Valiullina, A. Starovoytov and A. OshkinSummaryThe results of GPR survey carried out in Lake Vodoprovodnoe near the White Sea Biological Research Station of Moscow State University presented in this study. Methods of the field work and data processing are described.
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Sea Bottom Multifunctional Electroprosecting for Shelf and Transition Zones Study
Authors A. Lozovij, I. Ingerov and I. MendriiSummaryTwo versions of the equipment are available, having their own design features. The first versions is designed for work at sea depths of 20–200 m, and the second is specially designed for the study of transition zones 0–50 m, where the undercurrent and sea disturbances have a serious impact on the operation of the equipment. Both types of equipment are produced in five (Ex,Ey,Hx,Hy,Hz) and two channel (Ex, Ey) versions. The equipment is equipped with radio and acoustic communication modules. Synchronization is performed on the deck of the vessel, then the system is sealed and immersed. The system is surfaced by an acoustic signal from the surface of the water. The light radio beacon makes it easy to localize the system on the surface of the water even when the sea is rough.
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Software of 3D Modeling and 3D Inversion for Marine Electrical Prospecting
Authors M.G. Persova, Y.G. Soloveichik, D.V. Vagin, D.S. Kiselev, Yu.I. Koshkina, P.A. Domnikov and M.G. TokarevaSummaryThe paper proposes the approaches which makes it possible to increase a computationally efficiency of the solution of the direct and inverse “multisource” problems of the marine electrical prospecting in the time and frequency domains. These approaches include the special mathematical formulations, algorithms of generating the optimized finite element meshes and grouping the problems corresponding to the different transmitter and receiver positions and time steps. Besides, the paper presents the software implementing these approaches and allowing performing the 3D modeling of the different marine electrical prospecting technologies and 3D inversion of the obtained data with recovering the geometric and electrophysical parameters of the structural parts of the geological model. The software operates in a distributed computer system consisting of the multicore computers connected by a local network. This software includes the manager program providing the data transfer from client to servers, obtaining the results of the calculations, and checking and correct processing the situations of a breakdown of the communications between computers and an emergency shutdown of some computational nodes.
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The Model of Stability State of a Tunnel Under Construction on the Basis of Data Layered Seismic Survey
Authors V. Pisetski, A. Zudilin and S. ChevdarSummaryThe presented report discusses the survey results of the technical condition of the unfinished road tunnel construction on the site: “The public highway of regional importance of the Republic of Bashkortostan - a new exit from the city of Ufa to the federal highway M-5 Ural (Eastern exit).” The purpose of the work was to research the engineering-geological and hydro-geological conditions of tunnel to estimate rock mass stability. At the moment, the main problems in the process of developing the project for the reconstruction of the tunnel and the completion of its construction are:
- - the presence of karst formations in the vicinity of the tunnel;
- - water-saturated zones, not opened by existing galleries.
The exploration of these problems will be the basis for the decision on the need to build a drainage tunnel. It was these circumstances that required the use of the seismic method in a sophisticated observation system with the ultimate goal of constructing a 3D parametric data set that provides for the detection of karst formations and disintegration zones at hazardous distances from the tunnel axis.
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Research of the Sequence of Casual Natural Events by Methods of the Queueing Theory
Authors S.G. Kataev and S.S. KataevaSummaryIn work it is offered to use for the detection of latent regularities in time series of the casual natural phenomena some elements created for the description of flow casual events of various origin, a mathematical apparatus of the queueing theory. The method developed by authors allowing to find flow parameters using only the moments of approach of events is described. Results of application of a method are shown on the example of earthquakes
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Study of Modern and Relict Coastal Landforms in the Eastern Part of Gulf of Finland With GPR
Authors L.M. Budanov, A.Yu. Sergeev, I.A. Neevin and A.A. MoskovtsevSummaryThe thesis presents the possibilities and results of GPR profiling for the selection of relict coastal landforms developed on the coast of the eastern part of the Gulf of Finland. The geological interpretation of the geophysical section is described and preferable antennas and setups for studying coastal-marine, fluvioglacial and glacial deposits are indicated.
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Possibilities of Geophysical Methods for Archaeological Study in Various Geological and Geomorphological Conditions
Authors A. Borisik, M. Kashkevich and M. ShitovSummaryThe efficiency of geophysical methods for the aim of investigations of archaeological objects in the Holocene sediments are presented.
The results obtained by authors in recent years are based on the research of three objects:
- Kushmanskoye gorodische, X-XIII centuries, republic of Udmurtia;
- Paleochannel of the Svir River, Leningrad region;
- Buried military equipment and fortifications of the Great Patriotic War (island B. Tyuters, Gulf of Finland).
The reasons of low informativity of some geophysical methods, revealed in a number of cases, despite the petrophysical prerequisites for their use, are discussed.
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