Measured and modeled gravity anomalies above the tunnel in clays - implication for errors in gravity interpretation

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Measured and modeled gravity anomalies above the tunnel in clays - implication for errors in gravity interpretation

Popis výsledku v původním jazyce

We measured gravity anomaly above the tunnel excavated in clays. Technical parameters of the tunnel were known. In order to obtain material parameters of clays the borehole was drilled in the study area. For calculation of gravity anomaly of the tunnel we used wet bulk densities of clays derived from laboratory measurements of drill core samples. But the fit between observed and calculated gravity data were poor in this case. If we use for interpretation densities calculated from laboratory measurementswe interpret the roof of the tunnel much deeper than it is in reality. The reason is that the borehole clay samples do not retain natural moisture probably. Much better fit between observed and calculated gravity values we received when we used for modeling densities derived from gamma-gamma log.

Název v anglickém jazyce

Measured and modeled gravity anomalies above the tunnel in clays - implication for errors in gravity interpretation

Popis výsledku anglicky

We measured gravity anomaly above the tunnel excavated in clays. Technical parameters of the tunnel were known. In order to obtain material parameters of clays the borehole was drilled in the study area. For calculation of gravity anomaly of the tunnel we used wet bulk densities of clays derived from laboratory measurements of drill core samples. But the fit between observed and calculated gravity data were poor in this case. If we use for interpretation densities calculated from laboratory measurementswe interpret the roof of the tunnel much deeper than it is in reality. The reason is that the borehole clay samples do not retain natural moisture probably. Much better fit between observed and calculated gravity values we received when we used for modeling densities derived from gamma-gamma log.

Druh

D - Stať ve sborníku

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Near Surface 2011 Conference proceedings

ISBN

978-90-73834-15-6

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

1-5

Název nakladatele

EAGE

Místo vydání

Houten, The Netherlands

Místo konání akce

Leicester, UK

Datum konání akce

12. 9. 2011

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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