scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 2(11)2011 (2(11)) ◽  
pp. 161-163
Author(s):  
S. P. Levashov ◽  
◽  
M. A. Yakymchuk ◽  
I. M. Korchahin ◽  
◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Water Flow ◽  
Geophysical Methods ◽  
Practical Application ◽  
Pulsed Electromagnetic Field ◽  
Landslide Area ◽  
Electric Resonance ◽  
Ground Waters ◽  
Pulsed Electromagnetic

The results of practical application of geoelectric methods of forming short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS), as well as georadar soundings on destroyed by landslide area of road are given. It is shown, that the presence of the zone with raised filtering of ground waters is the main reason of roadway erosion and landslide formation. The finding and mapping of water flow and area of the raised soil moistening can be realized operatively by complex of mobile geophysical methods.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2007 ◽  
Vol 1(6)2007 (1(6)) ◽  
pp. 67-71
Author(s):  
S. P. Levashov ◽  
◽  
M. A. Yakymchuk ◽  
I. M. Korchahin ◽  
M.D. Zhuldaspayev ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Oil And Gas ◽  
Pulsed Electromagnetic Field ◽  
Electric Resonance ◽  
Pulsed Electromagnetic ◽  
Principal Possibility

The results of the geoelectric methods of formation of short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS) using during aerogeophysical investigation conducting within the perspective for the oil and gas Kostanayskaya area are given. The principal possibility of the survey by FSPEF method conducting from airplane is shown. This testifies that FSPEF survey can be used with other aerogeophysical methods for reconnaissance investigation of big for area and difficult of access territories.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 2(11)2011 (2(11)) ◽  
pp. 164-166
Author(s):  
S. P. Levashov ◽  
◽  
M. A. Yakymchuk ◽  
I. M. Korchahin ◽  
◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Data Processing ◽  
Satellite Data ◽  
Pulsed Electromagnetic Field ◽  
Electric Resonance ◽  
Ore Minerals ◽  
Pulsed Electromagnetic

The results of experimental approbation of geoelectric methods of forming short-pulsed electromagnetic field (FSPEF) vertical electric-resonance sounding (VERS) and the technology of satellite data processing and interpretation for the "direct" prospecting the ore minerals and water-bearing reservoirs are analyzed.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 2(11)2011 (2(11)) ◽  
pp. 158-160
Author(s):  
S. P. Levashov ◽  
◽  
M. A. Yakymchuk ◽  
I. M. Korchahin ◽  
◽  
...  
Keyword(s):  
Oil And Gas ◽  
Geophysical Methods ◽  
Remote Sensing Data ◽  
Mapping Method ◽  
Special Method ◽  
Pulsed Electromagnetic Field ◽  
Electric Resonance ◽  
Oil And Gas Exploration ◽  
Aerial Mapping ◽  
Pulsed Electromagnetic

The mobile geophysical technology include a special method of the remote sensing data processing and interpreting, aerial mapping method of the forming short-pulsed electromagnetic field (FSPEF), method of vertical electric-resonance sounding (VERS). Inclusion of such technologies in traditional complex of exploration geological-geophysical methods will promote both minimization of the financial expenses on the oil-and-gas exploration problems solving, and essential reduction of time for their practical realization.

scholarly journals CORRELATION OF NATURAL PULSED ELECTROMAGNETIC FIELD OF THE EARTH WITH STRESSES AND DEFORMATIONS, WHICH APPEARED IN EXHAUSTED SALT FIELDS IN THE PRECARPATHIANS FOR KARST CREATION FORECASTING

2020 ◽  
pp. 79-88
Author(s):  
S. Bagriy ◽  
E. Kuzmenko ◽  
U. Dzoba
Keyword(s):  
Electromagnetic Field ◽  
Potassium Salt ◽  
Upper Cretaceous ◽  
Evaluation Method ◽  
Geophysical Methods ◽  
Donets Basin ◽  
Salt Deposit ◽  
Pulsed Electromagnetic Field ◽  
The Earth ◽  
Pulsed Electromagnetic

The purpose of the work is to determine the state of study and the prospects for further research on the vertebrate animals remains from the Mesozoic deposits of the Lugansk region. To achieve this goal, collection and generalization of information on the locations of vertebral remains among the Mesozoic deposits of Lugansk region were made. Despite the considerable amount of findings of various groups of Mesozoic vertebrates remains in the Donets Basin territories adjoining them, their systematic and purposeful study, unfortunately, was not conducted in Lugansk region, although indications of the findings of the Mesozoic vertebrates remains in the Luhansk region occur quite often. As a result of the processing of published materials and preliminary interpretation of field observations, a list of 20 sites located mainly on the right bank of the Siversky Donets within the Lugansk region is compiled. Almost all the places are confined to the Upper Cretaceous deposits, much less – to the basal layers of the Paleogene and only one to the Triassic. The vast majority of the locations of the Upper Cretaceous are confined to the area in contact with an array of coal deposits (the so-called "open Carboniferous"). Outwards from it, the rocks are more open-sea and they drastically reduce the diversity of the fossil fauna. Therefore, outlining the range of promising areas regarding finding vertebrate animals remains one should be aware of the above-mentioned pattern of their placement. Triassic deposits of the Donbas are not at all investigated for finding the remains of vertebrates, although their potential is very significant. Nevertheless, due to the small area of the Triassic deposits outcrop in the Lugansk region, searches need to be directed to the west – in the Donetsk and Kharkiv regions.The problem of solving the ecological and geological issues which arise as the result of working off in natural resources (in particular the deposits of potassium salts) is actual at this time. Specificity is in easy solubility of salts and therefore the creation of artificial cavities and karstic phenomena. The article examines the ways to solve the problems of mapping the salt karst and forecasting creation of dips and subsidence of the earth's surface by the example of Kalush-Holyn potassium salt deposit which is located in Ukrainian Precarpathians. As the basis of the research, the complex geophysical methods were considered. It was proved that the method of natural pulsed electromagnetic field of the Earth (NPEMFE) can be selected as a reliable evaluation method of stress-strain state of rocks and prediction of karst processes and deformations which is associated with the presence of extracting chambers. The article describes the physical preconditions for applying the method, sets out the basic postulates of field intensity anomalies classification and proposes the methodology for depth evaluation. Using the real examples - the profile and planar research of potassium salt deposit - the succes of the NPEMFE method is shown, along with its effectiveness to solve some ecological and geological problems, as well as feasibility of using the method in other areas.

scholarly journals ELECTROMAGNETIC METHOD FOR PERMAFROST GEOPHYSCIAL RESEARCH

2019 ◽  
Vol 1 (2) ◽  
pp. 55-64
Author(s):  
Sergey Malyshkov ◽  
Vasily Gordeev ◽  
Vitaly Polivach
Keyword(s):  
Electromagnetic Field ◽  
Structural Strength ◽  
Geophysical Methods ◽  
Strained State ◽  
Pulsed Electromagnetic Field ◽  
Hardware System ◽  
Pulsed Electromagnetic ◽  
First Time ◽  
Oil Gas ◽  
Research Structure

The work suggest a method to research structure and estimate stress-strained state of perma-frosts, based on Earth's natural pulsed electromagnetic field parameters recording. Unlike previously used geophysical methods applied for such tasks, based on measuring electric and magnetic perma-frosts properties, for the first time the method applied is based on determining structural, strength and deformational properties of the rocks. Algorithm and software-hardware system implementing the method is tested during engineering-cryological mapping of the Yakutia's Chayadinsk oil, gas and condensate field territory where line facilities are located. Examples of varying morfology cryo-genic formations detection are demonstrated as well as method's capacity to be applied to monitor geocryological processes in conditions of technogenic influence and global warming.

scholarly journals Pulsed electromagnetic field stimulation may improve fusion rates in cervical arthrodesis in high-risk populations

2018 ◽  
Vol 7 (2) ◽  
pp. 124-130 ◽  
Author(s):  
D. Coric ◽  
D. E. Bullard ◽  
V. V. Patel ◽  
J. T. Ryaby ◽  
B. L. Atkinson ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Risk Factor ◽  
High Risk ◽  
Clinical Risk Factor ◽  
Field Stimulation ◽  
Pulsed Electromagnetic Field ◽  
Exact Test ◽  
High Risk Populations ◽  
Pulsed Electromagnetic ◽  
Pemf Treatment

Objectives Pulsed electromagnetic field (PEMF) stimulation was evaluated after anterior cervical discectomy and fusion (ACDF) procedures in a randomized, controlled clinical study performed for United States Food and Drug Administration (FDA) approval. PEMF significantly increased fusion rates at six months, but 12-month fusion outcomes for subjects at elevated risk for pseudoarthrosis were not thoroughly reported. The objective of the current study was to evaluate the effect of PEMF treatment on subjects at increased risk for pseudoarthrosis after ACDF procedures. Methods Two evaluations were performed that compared fusion rates between PEMF stimulation and a historical control (160 subjects) from the FDA investigational device exemption (IDE) study: a post hoc (PH) analysis of high-risk subjects from the FDA study (PH PEMF); and a multicentre, open-label (OL) study consisting of 274 subjects treated with PEMF (OL PEMF). Fisher’s exact test and multivariate logistic regression was used to compare fusion rates between PEMF-treated subjects and historical controls. Results In separate comparisons of PH PEMF and OL PEMF groups to the historical control group, PEMF treatment significantly (p < 0.05, Fisher’s exact test) increased the fusion rate at six and 12 months for certain high-risk subjects who had at least one clinical risk factor of being elderly, a nicotine user, osteoporotic, or diabetic; and for those with at least one clinical risk factor and who received at least a two- or three-level arthrodesis. Conclusion Adjunctive PEMF treatment can be recommended for patients who are at high risk for pseudoarthrosis. Cite this article: D. Coric, D. E. Bullard, V. V. Patel, J. T. Ryaby, B. L. Atkinson, D. He, R. D. Guyer. Pulsed electromagnetic field stimulation may improve fusion rates in cervical arthrodesis in high-risk populations. Bone Joint Res 2018;7:124–130. DOI: 10.1302/2046-3758.72.BJR-2017-0221.R1.

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