Rotation of principal axes and changes of stress due to mine-induced stresses

0447884 - ÚGN 2016 RIV CA eng J - Journal Article
Ptáček, Jiří - Koníček, Petr - Staš, Lubomír - Waclawik, Petr - Kukutsch, Radovan
Rotation of principal axes and changes of stress due to mine-induced stresses.
Canadian Geotechnical Journal. Roč. 52, č. 10 (2015), s. 1440-1447. ISSN 0008-3674. E-ISSN 1208-6010.
[International Colloquium on Geomechanics and Geophysics /5./. Karolinka, 25.06.2014-27.06.2014]
R&D Projects: GA MŠMT ED2.1.00/03.0082; GA MŠMT(CZ) LO1406
Institutional support: RVO:68145535
Keywords : mining * principal stress * stress distribution * modified overcoring
Subject RIV: DH - Mining, incl. Coal Mining
Impact factor: 1.877, year: 2015
http://www.nrcresearchpress.com/doi/full/10.1139/cgj-2014-0364#.VgqDPpc70mt

This research project comprises stress monitoring, primarily of the changes induced by longwall mining or destress blasting, which was realized in a mine of the Ostrava-Karviná Coalfields (Upper Silesian Coal Basin). Verification of the stress field response to stresses induced by different geological or mining factors was the main aim of the research project. Stress change monitoring in the region of the advanced longwall was carried out using seven stress probes. In all, seven boreholes were instru- mented with compact conical ended borehole monitoring (CCBM) probes for continuous stress monitoring of the stress–strain changes due to mining and the destress blasting effect. Compact conical-ended borehole overcoring (CCBO) and CCBM probe instal- lation were carried out before the start of the longwall mining. Data of the stress changes in all seven probes were recorded weekly and, after the longwall advanced, daily. Analysis of the stress changes was based on the idea of original stress distribution, which is based on long-term experiences in rock mass behavior in similar geological and mining conditions.
Permanent Link: http://hdl.handle.net/11104/0249632