Abstract:Micro-seismic monitoring technology has become a fundamental method for deep-ground pressure research and management. Based on the IMS micro-seismic monitoring system, the micro-fractures of rock mass caused by the mining process of Chifeng NFC Baiyinnuoer lead-zinc mine are monitored, it can accurately reflect the stability of the goafs and production operation stopes in the target areas. Data analysis shows that: (1) By analyzing the spatiotemporal distribution of micro-seismic events, using b-value method and the methods of relationships between energy index (EI) and cumulative apparent volume(CAV), as well as Schmidt number(Scs ) and CAV, combined with on-site construction conditions, micro-seismic data can be more accurately analyze and the overall stability of underground mining sites can be evaluate effectively to draw reasonable conclusions; (2) On the premise of EI decreases, the slip in slope of the CAV curve at the inflection points corresponds to an decrease in the probability of occurrence of micro-seismic events or the number of micro-seismic events compared to the last previous values, and vice versa; On the premise of Scs decreases, regardless of the rise or fall in the slope of the CAV curve at the inflection points, the probability of occurrence of micro-seismic events or the number of micro-seismic events compared to the last previous values both decrease; (3) The frequency of occurrence of aftershock events caused by large explosions in the underground mining area of this nonferrous metal mine has significantly decreased, a good stability of the production site could be demonstrated. The application of this system will play a positive role in earthquake prevention, disaster reduction, and safety production in the underground mining of Chifeng NFC Baiyinnuoer lead-zinc mine.