Spatio-temporal monitoring and pre-warning technology for rockburst in deep geological structure areas

In response to the complex geological structure of 1309 working face in Guojiahe Coal Mine, based on the microseismic monitoring data, the frequency of mining tremors and energy change, and spatio-temporal evolution characteristics of mining tremors focus during mining are analyzed, to obtain the precursor information of rockburst hazards. A targeted combining approach bursting strain energy used for short-term spatial-temporal monitoring and spatio-temporal evolution of mining tremors used for long-term dynamic pre-warning is proposed. By using the spatio-temporal evolution index of mining tremors, a periodic dynamic evaluation of rockburst risk of the working face is made, and the location of strong mining tremors and dynamic manifestations in the next period is predicted, and subsequent pressure relief effect inspection is conducted. The bursting strain energy index reflects the real-time rockburst risk status in time series, predicts the dynamic manifestation and the occurrence time of strong mining tremors in real-time, provides timely rockburst risk pre-warning information, and guides the on-site implementation of corresponding prevention and control measures, which realizes dynamic detection and（semi） quantitative warning of rockburst risk areas in the deep geological structure stress concentration area of Guojiahe Coal Mine.