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Statements

Subject Item
n2:RIV%2F61989100%3A27350%2F12%3A86082169%21RIV14-TA0-27350___
rdf:type
skos:Concept n11:Vysledek
rdfs:seeAlso
http://sgem.org/sgemlib/spip.php?article1993&lang=en
dcterms:description
One of the problems encountered in the areas with abandoned mining activities in coal underground mines is emergence of methane from residual parts of the coal seams. The article responds to the need for knowledge of natural processes in the given area, and therefore deals with the simulation and modelling of methane flow from underground to the surface through the rock massif. Model of the natural environment corresponds to our knowledge of the realistic situation and possibilities of tools used for creating the models. In the model explored, the massif is composed of two types of rocks with different gas permeability and one degassing borehole. In the first case, we deal with a borehole with casing and with perforations; in the latter case, the given borehole without casing along the whole length in the rock environment. Our task is to compare differences in the methane flow in the borehole area and in the above-mentioned boreholes as well as during changes in barometric pressure. Exclusivity of this original approach is the effort to visualize and demonstrate how the gas behaves in a porous environment in the model examples that we tested. Without the use of numerical flow technology, commonly referred to as CFD programs (Computational Fluid Dynamics) [1], we can practically never visualize and learn the situation in flowing through porous compact rock which is unaffected by human activities except for the exploratory borehole. Thanks to the use of the Fluent program, we are able to theoretically simulate and subsequently learn how ambient influences may alter and act upon the flow from underground to the surface and change the immediate conditions affecting this flow. To create a geometric model of the working area, we used the Gambit software tool; for modelling the gas flow, we used the CFD Fluent software, ANSYS, Inc. [2] One of the problems encountered in the areas with abandoned mining activities in coal underground mines is emergence of methane from residual parts of the coal seams. The article responds to the need for knowledge of natural processes in the given area, and therefore deals with the simulation and modelling of methane flow from underground to the surface through the rock massif. Model of the natural environment corresponds to our knowledge of the realistic situation and possibilities of tools used for creating the models. In the model explored, the massif is composed of two types of rocks with different gas permeability and one degassing borehole. In the first case, we deal with a borehole with casing and with perforations; in the latter case, the given borehole without casing along the whole length in the rock environment. Our task is to compare differences in the methane flow in the borehole area and in the above-mentioned boreholes as well as during changes in barometric pressure. Exclusivity of this original approach is the effort to visualize and demonstrate how the gas behaves in a porous environment in the model examples that we tested. Without the use of numerical flow technology, commonly referred to as CFD programs (Computational Fluid Dynamics) [1], we can practically never visualize and learn the situation in flowing through porous compact rock which is unaffected by human activities except for the exploratory borehole. Thanks to the use of the Fluent program, we are able to theoretically simulate and subsequently learn how ambient influences may alter and act upon the flow from underground to the surface and change the immediate conditions affecting this flow. To create a geometric model of the working area, we used the Gambit software tool; for modelling the gas flow, we used the CFD Fluent software, ANSYS, Inc. [2]
dcterms:title
The efficiency comparison of degassing porous environment by two different options of degassing using modelling and simulation The efficiency comparison of degassing porous environment by two different options of degassing using modelling and simulation
skos:prefLabel
The efficiency comparison of degassing porous environment by two different options of degassing using modelling and simulation The efficiency comparison of degassing porous environment by two different options of degassing using modelling and simulation
skos:notation
RIV/61989100:27350/12:86082169!RIV14-TA0-27350___
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n12:orjk%3A27350
n4:aktivita
n17:P
n4:aktivity
P(TA02011078)
n4:dodaniDat
n23:2014
n4:domaciTvurceVysledku
n8:7314957 n8:2938413 n8:7032005 n8:9077758
n4:druhVysledku
n21:D
n4:duvernostUdaju
n10:S
n4:entitaPredkladatele
n5:predkladatel
n4:idSjednocenehoVysledku
133534
n4:idVysledku
RIV/61989100:27350/12:86082169
n4:jazykVysledku
n18:eng
n4:klicovaSlova
borehole with and without casing; flow of gases; modelling and simulation; degassing borehole; Fluent software; CFD program; rock degassing
n4:klicoveSlovo
n6:borehole%20with%20and%20without%20casing n6:rock%20degassing n6:CFD%20program n6:flow%20of%20gases n6:modelling%20and%20simulation n6:degassing%20borehole n6:Fluent%20software
n4:kontrolniKodProRIV
[DC6ED4984F3B]
n4:mistoKonaniAkce
Albena
n4:mistoVydani
Sofia
n4:nazevZdroje
12th International Multidisciplinary Scientific GeoConference SGEM 2012 : conference proceedings. Volume I-V
n4:obor
n20:DH
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
4
n4:projekt
n13:TA02011078
n4:rokUplatneniVysledku
n23:2012
n4:tvurceVysledku
Kebo, Vladimír Strakoš, Vladimír Fuchsíková, Petra Staša, Pavel
n4:typAkce
n16:WRD
n4:zahajeniAkce
2012-06-17+02:00
s:issn
1314-2704
s:numberOfPages
8
n22:doi
10.5593/SGEM2012/S05.V2011
n19:hasPublisher
STEF92 Technology Ltd.
n15:organizacniJednotka
27350