Application Seismoelectric Method for Inspection Electrically Conducting Media

2014 ◽  
Vol 490-491 ◽  
pp. 1712-1716 ◽  
Author(s):  
Artem Bykov ◽  
Oleg Kuzichkin

The paper presents basic geoelectric models given the seismoelectric effect for application in pro-cessing algorithms of the geodynamic information. They can improve the reliability of the estimation under the control of geodynamic processes and phenomena taking place in the surface layers of the geological environment. The models under the effect of longitudinal and transverse modes of seis-mic waves on a small particle of the environment are considered. A one-dimensional model of the environment under the joint effect of the longitudinal and transverse modes of seismic waves is pre-sented. The mathematical modeling of two media under the effect of longitudinal elastic defor-mation is given. The dependences of the relative change in the transfer coefficient for two media on the electrical parameters of contrast media both resistivity and dielectric constants are discussed. Based on the results of mathematical modeling, the application of seismoelectric effect in geody-namic control systems proves to be highly efficient.

2001 ◽  
Vol 688 ◽  
Author(s):  
Yasuo Cho ◽  
Koya Ohara

AbstractA higher order nonlinear dielectric microscopy technique with higher lateral and depth resolution than conventional nonlinear dielectric imaging is investigated. The proposed technique involves the measurement of higher order nonlinear dielectric constants, with a depth resolution of down to 1.5 nm. The technique is demonstrated to be very useful for observing surface layers of the order of unit cell thickness on ferroelectric materials.


2019 ◽  
Vol 129 ◽  
pp. 01019
Author(s):  
Aleksandr Sidlyar ◽  
Boris Saksin ◽  
Marina Potapchuk ◽  
Vitaliy Usikov ◽  
Mikhail Lo-mov

Based on the results of a joint analysis of seismic-acoustic monitoring data and the geological and structural features of the Niko-laevsk deposit, the main regularities of the formation of technogenic stress fields that determine its impact hazard have been identified. Additionally, using the method of mathematical modeling, a study was done of the stress-strain state of the rock mass taking into account the tectonically ac-tive fault TD-3 and safety measures were proposed to reduce the impact hazard of the rock mass at the Nikolaevsk deposit.


Author(s):  
Н.И. Музаев ◽  
К.С. Харебов ◽  
И.Д. Музаев

Составлена математическая модель совместных сейсмических колебаний высоконапорной плотины, водохранилища и двух слоев массива грунта под основаниями плотины и водохранилища. Модель представляет контактную краевую задачу математической физики в которой учтены взаимозависимости колебательных процессов в грунтовой толще, в плотине и в водохранилище при распространении гармонической сейсмической волны в рассматриваемой системе. В результате решения поставленной задачи получены расчетные формулы для вычисления относительных амплитуд сейсмических колебаний гребня и основания плотины. The mathematical model of the co-seismic vibrations of high-pressure dams, reservoirs and two layers of soil under the foundations of the dam and reservoir is created. The model represents the contact boundary value problem of mathematical physics which takes into account the interdependence of oscillatory processes in soil, in the dam and in the reservoir during the propagation of harmonic seismic waves in the system under consideration. As a result of solving the tasks the formulae are derived to calculate the relative amplitudes of the oscillations of the top and the base of the dam.


Author(s):  
Х.О. Чотчаев ◽  
О.Г. Бурдзиева ◽  
В.Б. Заалишвили

Научно обоснованный прогноз геоэкологической эволюции территорий на основе анализа причинно-следственной зависимости эндогенных и экзогенных процессов является актуальной задачей обеспечения безопасности рекреантов и планирования долгосрочного развития высокогорных туристско-рекреационных комплексов. Цель исследований – долгосрочной прогноз геоэкологической эволюции территории на основе факторов геодинамического развития и их признаков в геофизических полях. Для достижения поставленной цели решались следующие задачи: анализ современных представлений о влиянии эндогенных геодинамических процессов на изменения природной среды горных территорий и определение геодинамической концепции геоэкологической зависимости; методологическое обоснование проявлений геофизических полей-индикаторов тектономагматических процессов и выбор методов их исследования, выделение зон активных разломов и неотектонических проявлений. Использованы материалы исследований методами обменных волн землетрясений, гравимагнитометрии, микросейсмического зондирования, электротомографии, преломленных сейсмических волн, геолокации. В качестве результатов исследований делается вывод, что геоэкологические изменения вызваны неотектоникой трещинного типа в приледниковых зонах активных глубинных разломов из-за неравномерного воздымания отдельных участков территории при горообразовании, обуславливающего напряженно-деформированное состояние среды, концентрацию гравитационной энергии и последующее разрушение коренных пород приледниковых зон. Установлено, что механические, физические и геохимические поля, как неотъемлемые признаки-индикаторы проявлений и основа методологических обоснований исследований геодинамических процессов, оказывают долговременное влияние на породы на всех уровнях породообразования, формируя современную кору выветривания, и обуславливая интенсивное накопление четвертичных отложений. Определен режим среднестатической геоэкологической эволюции территории, который определяется соотношением скоростей прироста гор и темпов денудации. Делается вывод, что комплекс сопутствующих признаков – индикаторов представляют собой абиотические факторы геоэкологической среды, особого биотопа, где зарождается определенная популяция биоценоза с эндемической зависимостью к этим условиям A scientifically established forecast of the geoecological evolution of areas based on the analysis of the causal relationship of endogenous and exogenous processes is a relevant task of ensuring the safety of vacationers and planning the long-term development of high-mountain tourist and recreational complexes. Aim. The aim of the research is a long-term forecast of the geoecological evolution of the area based on the factors of geodynamic development and their signs in geophysical fields. To achieve this goal, the following tasks were solved: analysis of modern ideas about the impact of endogenous geodynamic processes on changes in the natural environment of mountain areas and the definition of the geodynamic concept of geoecological dependence; methodological substantiation of the manifestations of geophysical fields-indicators of tectonomagmatic processes and the choice of methods for their study, identification of zones of active faults and neotectonic manifestations. Methods. Materials of research by methods of converted waves of earthquakes, gravimagnetometry, microseismic sounding, electro-tomography, refracted seismic waves, geolocation were used. Results. As a result of the research, it is concluded that geoecological changes are caused by fracture neotectonics in the periglacial zones of active deep faults due to uneven uplift of certain parts of the territory during mountain building, which causes the stress-strain state of the environment, the concentration of gravitational energy and the subsequent destruction of the bedrock of the periglacial zones. It has been determined that mechanical, physical and geochemical fields, as integral indicators of manifestations and the basis of methodological substantiation of studies of geodynamic processes, have a long-term effect on rocks at all levels of rockforming, creating the modern weathering crust, and causing an intensive accumulation of Quaternary sediments. The mode of average static geoecological evolution of the area is defined. It is determined by the ratio of the growth rates of mountains and the rates of denudation. One can draw a conclusion that the complex of accompanying signs-indicators is abiotic factors of geoecological environment, a special biotope, where a certain population of biocenosis with endemic dependence to these conditions arises


2019 ◽  
Vol 489 (6) ◽  
pp. 552-557
Author(s):  
B. N. Chetverushkin ◽  
A. V. Saveliev ◽  
V. I. Saveliev

This letter presents the results of the mathematical modeling of processes of electrically conducting fluid flow dynamics for complex heat transfer systems. The study was carried out based on detailed calculations on parallel high performance computational systems on the basis of the kinetically consistent magnetogasdynamic approach, adjusted for this class of problems. The kinetically consistent algorithm adapts well to the architecture of high performance computational systems with massive parallelism and makes it possible to conduct effective research of complex heat transfer systems with high resolution. The article presents the approach, method and algorithms as well as the results of the mathematical modeling.


2018 ◽  
Vol 12 (04) ◽  
pp. 1841002
Author(s):  
Kiyoshi Irie ◽  
Dorjpalam Saruul ◽  
Kazuo Dan ◽  
Haruhiko Torita

In Japan, the seismic waves radiated from the fault in the surface layers above the seismogenic layer are not considered in the usual strong motion prediction. However, in the inland crustal earthquakes, the strong ground motions in the areas close to the surface faults could be influenced by the seismic waves radiated from the fault in the surface layers. Hence, we evaluated the seismic waves radiated from vertical strike-slip and dipping reverse faults in the surface layers to investigate their influence on the strong motions. The results of the strike-slip fault showed that the seismic waves of the fault normal (FN) component were larger than those of the fault parallel (FP) component in the period range of 0.5–5 s. At least, 80–90% of the FN component was attributed to the seismic wave radiated from the fault in the seismogenic layer. Almost 100% of the FP component was attributed to the seismic waves radiated from the fault in the surface layers. On the other hand, the results of the reverse fault showed that the seismic waves were not attributed to those from the fault in the surface layers.


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