Geological dynamic conditions and forecast technology for rock bursts

This paper systematically studies the comprehensive effect of natural geological dynamic conditions and min- ing engineering effect on rock burst and rock burst monitoring forecast method in the mine field. The paper has devel- oped an evaluation method and index system of rock burst geological dynamic conditions and proposed a method of forecasting rock burst by monitoring fault activity in anchor cable. The paper finds that natural geological dynamic con- ditions is a necessary condition for the occurrence of rock burst and mining engineering effect is sufficient condition for the occurrence of rock burst. The mine rock burst must be corresponding to geological dynamic conditions,and mining engineering activities are just inducing factors. There is a correlation between anchor cable stress variation and fault activity. When there is a mutation of the anchor cable dynamometer value,it indicates that the fault has been active, which can forecast the mine rock burst in a few days. Research results have been successfully applied in the 83003 working face of Laohutai Mine in China,which improves the safety production level of the mine.