| |
|
Stress-strain behaviour research of rocks under dynamic loading
Petroš, V. ; Bagde, M. N. ; Daněk, T. ; Hofrichterová, L. ; Hudeček, V. ; Michalčík, P. ; Slivka, V. ; Špinka, O. ; Vavro, M. ; Žůrek, P. ; Holub, Karel
The aim of this project was oriented to determination of physical-mechanical characteristics of rocks under dynamic load using laboratory device MTS 816 Rock Test System. The research was drawn to investigation of surrounding rocks properties, i.e. rocks from the rock massif, where anomaleous geomechanical events do occur.
|
|
Assessment of Rockbursts parameters inferred from in-situ observations
Petroš, V. ; Holub, Karel
The aim of this article is to determine maximum stress due to seismic waves propagation through the rock mass. For this determination, rock density, velocity of seismic waves propagation vp and vs and ground amplitudes were introduced. For the evaluation data recorded at 3 underground seismic station from the time period 1993-2002 were used. To this set of data only rockbursts with some consequences in mine were included. Based on these analyses, predominant frequencies of seismic P and S waves, dependences of ground amplitudes to scaled distance and stress at the head of seismic wave were calculated.
|
| |
| |
|
Stress evaluation on the head of seismic wave
Petroš, V. ; Holub, Karel
Paper is intended to investigation of ground velocites of the seismic waves propagation in the rock mass during rockbursts and other anomalous geomechanical events. These data will be used for experiments performed with the aim of comparison the behavior of rock in-situ and under laboratory loading.
|
| |
| |
|
11 Years of the underground seismic network in the OKR
Kalenda, P. ; Holub, Karel
In 1988 the underground digital seismological network in the OKR was put in trial operation and since 1989 it has been in a routine operation. In the paper all changes in data interpretation approaches applied during its 11 years existence and futher possibilities in operation improvement of this monitoring system are discussed.
|
| |