Geomechanical parametres of the Podlesí granites and their relationship to seismic velocities

Title:

Geomechanical parametres of the Podlesí granites and their relationship to seismic velocities

Creator:

Nováková, Lucie, Sosna, Karel, Brož, Milan, Najser, Jan, and Novák, Petr

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8fcfc928-853d-4a1d-9ada-46b55b8b2a9a
uuid:8fcfc928-853d-4a1d-9ada-46b55b8b2a9a
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, žuly, pórovitost, granites, porosity, Poisson’s ratio, seismic waves, Young’s modulus, shear modulus, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

We studied the geophysical, physical, and geomechanical parameters of the Podlesí granites in the western part of the Krušné hory Mts., near the village of Potůčky. The granites represent a fractionated intrusion within the Nejdecký Massif. In total, the studied borehole is about 300 m deep. The samples were collected at depths of between 35 and 105 metres. Seismic P-wave and S-wave velocities were measured using ultrasonic scanning. The samples were water-saturated, unsaturated, and dried. The ultrasonic scanning system consisted of four piezoelectric sensors and a digital oscilloscope recorder. The wave frequency was 1 MHz. P-wave velocities range from 4400 m.s-1 to 6500 m.s-1 while S-wave velocities range from 2800 m.s-1 to 3800 m.s-1. These data were used to calculate dynamic Young’s modulus, dynamic shear modulus, and Poisson’s ratio. The deformational characteristics of the rock were specified from experimental loading of the sample with uniaxial strain. The shear and longitudinal deformation of each sample was measured using a resistive strain gauge fixed directly on the sample. Intermittent loading of the samples proceeded using a uniform gradient of axial stress of 1 MPa.s-1. The samples were subjected to five separate loads. During the tests, following parameters were recorded: stress, longitudinal deformation, and shear deformation. These data were used to calculate static Young’s and shear modulus, and Poisson’s ratio., Lucie Nováková, Karel Sosna, Milan Brož, Jan Najser and Petr Novák., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2011 Volume:8 | Number:3 (163)

Harvested from:

CDK

Metadata only:

false