Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

Hydrogeological research of fractured rocks on the Potůčky-Podlesí site in the Krušné hory Mts.

 

Lenka Rukavičková

Geoscience Research Reports 38, 2005 (GRR for 2004), pages 166–168

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Abstract

Three hydrogeological boreholes PTP3, PTP4a and PTP5 deep 350, 300 and 300 m, respectively, were drilled in a granite massif in the Krušné hory Mts. Hydraulic properties of the fractured formation with low conductivity were investigated with modified water pressure tests. All tests were carried out on isolated borehole intervals separated by packers. The recognized values of the coefficient of hydraulic conductivity k are in the order from 10~9 to 10~7 m . s_1 for the subsurface fracture-opening zone in the depths up to approx. 100 m, from 10~10 to 10~9 m . s_1 in the middle part up to 170 m and from 10~u to 10~10 m . s_1 for the deepest part of boreholes. Pressure responses to a drilling and to a hydrodynamic testing in the borehole PTP5 were recorded in 12 isolated intervals of the boreholes PTP3 and PTP4a using the newly developed multipacker system. The field data will be used as the input and as the control of realistic output of the mathematical modeling.