Determination of static moduli in fractured rocks by T-matrix model
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00479393" target="_blank" >RIV/67985831:_____/17:00479393 - isvavai.cz</a>
Alternative codes found
RIV/00025798:_____/17:00000151 RIV/00216208:11310/17:10363703
Result on the web
<a href="http://actamont.tuke.sk/pdf/2017/n1/3chalupa.pdf" target="_blank" >http://actamont.tuke.sk/pdf/2017/n1/3chalupa.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Determination of static moduli in fractured rocks by T-matrix model
Original language description
This article compares static moduli determined using uniaxial tests and dynamic moduli calculated from elastic wave propagation velocities. On the example of limestones, we present the fact that for isotropic and intact rock, static and dynamic moduli correspond to each other over a broad range of frequencies. In damaged rock (cracks, weathering), a difference occurs and static moduli decrease. To include the effect of damage, T-matrix model has been selected. Dynamic moduli, porosity, density changes and information about properties of macroscopic cracks are necessary data for model calculation. These data are provided by other well logging methods such as an acoustic log with full waveform registration, density log, neutron log and acoustic scanner. Using all these data, a T-matrix model can predict static moduli from dynamic moduli. As we are dealing with well log data, we calculated vertical component of the elastic tensor only. This component is represented by Young's modulus E and Poisson's ratio.. The functionality of the model has been verified on real well logging data and corresponding limestone specimens acquired from borehole core. The differences between values of E modulus, originally up to 20 %, decreased to values similar to differences in intact rock, i.e. the order of the first units of percent. In the case of. values, demonstrable reduction of dynamic values, approaching static values was achieved, the resulting difference being less than 15 %.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Acta Montanistica Slovaca
ISSN
1335-1788
e-ISSN
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Volume of the periodical
22
Issue of the periodical within the volume
1
Country of publishing house
SK - SLOVAKIA
Number of pages
10
Pages from-to
22-31
UT code for WoS article
000410998400003
EID of the result in the Scopus database
2-s2.0-85018837564