Abstract:

The statistical research on the frequency of rock fall and earthquakes has obtained the following knowledge: (1) there is a good frequency correspondence between rock fall accidents and macro earthquakes; (2) quite a few micro earthquakes occurred at the same time with some rock falling accidents nearby. Some active faults passed through these coalmines; some earthquakes were caused by mining activities; and some were the responses to macro earthquakes. It is an important practice to look for all the active faults with great affection around a given coalmine for its production safety; the earthquakes on these faults will become a barometer of coalmine accidents and coalmine accident will also become the “stress window” for the active faults. Roof accidents should be taken as an evidence of tectonic stress fluctuation, which will interrupt the dynamic equilibrium of stress on mining site.

Key words: earthquake, rock fall, tectonic, coalmine geological accident