Foreshock and Aftershock Sequences of Rockbursts in Coal Mine Kladno-Mayrau

摘要

The occurrence of rockbursts in the Kladno deep coal mine displays very similar sequences to those observed for tectonic earthquakes in Europe. The types of these sequence are the following: single shock, main shock and aftershocks, main shock and foreshocks, double shocks, swarms and multiple events. No simple and clear relations between the occurrence of individual types and time variations of mining activities were detected. From this fact it follows that we should not much hope to utilise some of the known simple earthquake precursory phenomena for prediction of large rockbursts.