Laser-ultrasonic spectroscopy of the pechora basin coal microstructure
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00334795" target="_blank" >RIV/68407700:21110/19:00334795 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.25018/0236-1493-2019-06-0-56-65" target="_blank" >https://doi.org/10.25018/0236-1493-2019-06-0-56-65</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.25018/0236-1493-2019-06-0-56-65" target="_blank" >10.25018/0236-1493-2019-06-0-56-65</a>
Alternative languages
Result language
angličtina
Original language name
Laser-ultrasonic spectroscopy of the pechora basin coal microstructure
Original language description
Samples of the Pechora basin coal are tested with the pre-determined uniaxial compression strength in the normal direction to bedding. The test data show that different samples have close values of the uniaxial compression strength. The laser-ultrasonic spectroscopy in the mode of automatic scanning of coal sample surface at a pitch of 1 mm visualizes the internal structure of coal. It is found that in the vertical sections of the samples, cracks are mostly horizontal in conformity with the direction of bedding. The geometrical dimension and depth of cracks are determined. Based on the precision measurements of P- and S-wave velocities, the local values of Young's modulus and Poisson's ratio are for the first time obtained for coal accurate to 1 and 5%, respectively. The presence of cracks from 0.5 to 3 mm long with an opening of 80-200 |j.m results in dispersion of Young's modulus and Poisson's ratio in the ranges from 6.81 to 7.25 GPa and from 0.23 to 0.29. By the calculated values, the map of Young's modulus distribution over sample surface is plotted.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/EF16_027%2F0008465" target="_blank" >EF16_027/0008465: International Mobility of Researchers in CTU</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Mining Informational and Analytical Bulletin
ISSN
0236-1493
e-ISSN
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Volume of the periodical
6
Issue of the periodical within the volume
June
Country of publishing house
RU - RUSSIAN FEDERATION
Number of pages
10
Pages from-to
56-65
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-85070831383