Comparison of hydraulic conductivity of rock matrix and fractured blocks of granitic rocks

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000101" target="_blank" >RIV/00025798:_____/21:00000101 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/21:10438201

Result on the web

<a href="https://www.sciencedirect.com/science/article/abs/pii/S1365160921001295" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S1365160921001295</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmms.2021.104743" target="_blank" >10.1016/j.ijrmms.2021.104743</a>

Result language

angličtina

Original language name

Comparison of hydraulic conductivity of rock matrix and fractured blocks of granitic rocks

Original language description

Field measurements of hydraulic properties of the rock matrix and in low permeability hard rocks generally require highly accurate and sensitive technical equipment and special methods of measurement. Hydraulic conductivity of intact rocks is mostly measured in the laboratory conditions; field measurements are less common. The Czech geological survey developed equipment, which allows measurements of very low consumption of water during WPT (water pressure tests). This device enables to implement the same testing methodology for all sections of the borehole and subsequently compare the obtained results from low-permeability as well as more permeable sections.Hydraulic conductivity of eight different granitoids was studied in the Bohemian Massif in the Czech Republic. Mean values of hydraulic conductivity of fractured rock are on the order of 10-8 to 10-7 m·s-1, while hydraulic conductivity of rock matrix was most frequently on the order of 10–11 to10-12 m·s-1. The difference of values measured in laboratory and field is caused by scale effect. The significance of scale effect in rock matrix is determined mainly by the connectivity of a network of microfissures. Length and aperture of microfissures govern mainly the connectivity of fissure net in rock matrix. Coarse-grained granitoids have greater length and aperture of microfissures, higher connectivity and hydraulic conductivity, and the scale effect is less significant. The fracture network appearance and hydraulic conductivity of rock matrix is similar and characteristic for different types of granitoid rocks.

Czech name

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Czech description

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Type

J_imp - 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

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

International Journal of Rock Mechanics and Mining Sciences

ISSN

1365-1609

e-ISSN

—

Volume of the periodical

144

Issue of the periodical within the volume

August : 104743

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

nestránkováno

UT code for WoS article

000675894900002

EID of the result in the Scopus database

2-s2.0-85108080341