Technology Principle and Application of Microseismic Monitoring Rockburst

Abstract

In order to monitor and forecast rockburst, and analyze the source and magnitude,a set of microseismic monitoring rockburst technology was developed,combining with the actual situation in Dongtan coal mine.The technique used SOS microseismic monitoring system to determine failure points,record rockburst moments,the size of epicenter,the epicenter pressure drop and vibration mechanism,infer coal and rock stress state and destruction,and evaluate and monitor rockburst danger degree in accordance with changes of microseismic activities,focal position and activities tendency. The optimization microseismic monitoring network was layoutted in monitoring areas.The seismic geophone picked up microseismic signals and recorded in the rockburst figure,and the rockburst occurrence regularity and development trend were studied based on statistical analysis results of microseismic datas.Then by using VB6.0,the rockburst monitoring results were compounded in the mining drawing with concentration analysis.The rockburst events were statistical processed partitionedly to obtained vibration frequency,maximum vibration energy and total shock energy.The rockburst can be monitored and predicted through the rockburst events reflected by the datas.