Workshop
Sunday, 14th September 2008 (13.00 - 17.00 hrs)
Venue: Aula of AGH University of Science and Technology (building A-0)
Geophysical image of stress field in rock mass
The changes of the rock mass properties in result of the stresses can be manifested in different way. They are mostly results of the inelastic deformations of the brittle rocks particularly the intensive increase of fracturing (dylatancy), propagation of cracks and their coalescence, finally the lost of rock mass stability. Each of the stages of the rock mass deformations cause the changes of physical properties of rock mass such as its density, electrical resistivity, seismic velocity and attenuation. The gravimetric, seismic and geoelectrical methods can be used for the assessment of the stresses in the rock mass and passing of the deformations from one stage to another.
The emission of seismic waves is also related to the stresses, because the inelastic deformations produce elastic waves in different frequency ranges. The seismic emission can be registered and interpreted for prediction the time increase of inelastic deformation of the rock mass.
The workshop consists of presentations related to the results of different geophysical measurements and their interpretations for the stress assessment in rock mass. The natural and anthropogenic stresses in underground mines and in near surface conditions are interpreted on the base of the geophysical measurements. The discussion of the information quality obtained from the measurement results will be presented in workshop.
Chairman: Prof. Marcak Henryk
Workshop Programme
|
| 13.00 - 13.10 | Opening |
| 13.10 - 13.40 | Prof. Marcak Henryk (AGH University of Science and Technology) | The physical base of the geophysical measurements in rocks under stresses |
| 13.40 - 14.10 | Prof. Peter Styles (Keele University) | Coal mine seismic monitoring: the observation and interpretation of non-double-couple source signatures |
| 14.10 - 14.40 | Prof. Dubinski Jozef (Central Mining Institute) | Seismic method used for assessment the stresses in rock mass |
| 14.40 - 15.00 | Break (tea & coffee) |
| 15.00 - 15.30 | Prof. Lasocki Stanislaw (AGH University of Science and Technology) | Predicting ground motion due to mining-induced seismicity |
| 15.30 - 16.00 | Dr. Fritschen Ralf (DMT GmbH & Co. KG) | Rock mechanical investigation of seismic events in a German coal mine |
| 16.00 - 16.30 | Ass. Prof. Pilecki Zenon (AGH University of Science and Technology) | Seismoacoustic image of rock mass deformation |
| 16.30 - 17.00 | Discussion and closing |
