DBPapers
DOI: 10.5593/SGEM2014/B13/S3.036

GAZODINAMIC REGIME ON GEOMECHANICS POINT OF VIEW FOR JIU VALLEY COAL BEDS

V. Arad , S. ARAD , V. Adrian Cosma , M. Suvar
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-09-4 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 3, 269-276 pp

ABSTRACT
An analysis between dynamic regime of gases and geo-mechanical characteristics was realized based on observations and interpretation of underground measurements. Geomechanical properties were determined for rocks collected from the Valea Jiului basin and vary due to the degree of metamorphism. Geo-mechanical characteristics have a tendency to increase from the east to the west part of the basin. Results analysis obtained for the geo-mechanical properties of coal from the Valea Jiului show a great diversity depending on the mining area, the tectonic, the petrographic components and state of tension. Measurements regarding the gas emissions were performed in 174 boreholes, providing in this way a zoning of methane emissions. The dependencies between coal and rock porosity and methane concentration were assessed and between porosity, permeability and methane flows from the coal seams. Based on the theoretical and experimental research carried out, a statistical model describing the coal bed methane emissions was developed for the specific conditions within the Valea Jiului coal basin, in Romania.

Keywords: geomechanics, coal beds, emission, gazodinamic regime, statistical model