Temat: subsurface geophysics - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Measurement of Electromagnetic Field Component Emissions as a Precursor of Emerging Hazard in Coal Mines
Autorzy:: Mydlikowski, Remigiusz
Maniak, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/308433.pdf
Data publikacji:: 2019
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: coal mining
electromagnetic field
rock destruction
subsurface geophysics
Opis:: The article presents the results of research concerning electromagnetic (EM) ﬁeld emitted by rocks during the process of their destruction. The paper describes a measuring stand designed for subjecting rock samples to axial crushing. During the destruction of rock samples, both components of the electromagnetic ﬁeld emitted by the rock were recorded. The paper presents the results of research on hard coal samples, presenting the obtained time domain waveforms and frequency spectrum of the emitted EM ﬁeld components. Further potential uses of tests concerned with EM emitted by rocks are determined. Applications registering EM ﬁeld in mine environments may provide an early mine collapse warnings.
Źródło:: Journal of Telecommunications and Information Technology; 2019, 4; 30-35
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Zastosowanie metody konduktometrycznej do typowania stref o zmiennych parametrach filtracyjnych w obrębie podstawy wału przeciwpowodziowego
Application of the conductivity methods to select zones with variable filtration parameters around the base of river levee
Autorzy:: Cygal, A.
Stefaniuk, M.
Kret, A.
Klityński, W.
Powiązania:: https://bibliotekanauki.pl/articles/2075405.pdf
Data publikacji:: 2015
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: metody konduktometryczne
wał przeciwpowodziowy
przebicie hydrauliczne
geofizyka niesejsmiczna
conductivity methods
river levee
subsurface erosion
non-seismic geophysics
Opis:: The need to continuously monitor the flood embankment is necessary to introduce the measurement methods which give quick results in crisis situations. The protection of embankments as well as the prevention from floods are not only associated with the examination of the body river levee. Experience suggests that one of the problems involves the unknown geotechnical conditions of the levee base. Unfortunately, point geotechnical surveys carried out with a big measurement step were not able to fully identify the lithology variation over larger areas. This is caused by the high cost of drilling shallow wells. The application of non-invasive geophysical methods allows the completion of geotechnical research, and supplies additional information about the variability of geological medium. The structure in the area of the former river beds creates favorable conditions for carrying out geophysical surveys dependent on the variability of geoelectrical properties of rocks. This problem is solved by the use of conductivity method on the 100 m long part of the flood bank. This is recommended for quick and non-invasive measurements. A complex interpretation of geotechnical, hydrogeological and geophysical data provided information about the variability of geoelectrical parameters over this area and therefore made it possible to identify areas prone for greater filtration during high water levels.
Źródło:: Przegląd Geologiczny; 2015, 63, 10/1; 652--656
0033-2151
Pojawia się w:: Przegląd Geologiczny
Dostawca treści:: Biblioteka Nauki

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