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- Title
Stability analysis of underground stope based on micro-seismic monitoring.
- Authors
YUAN Xinyu; LI Min; SU Fengbo; XU Hongtu; WANG Yiren
- 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 El 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.
- Subjects
MINES &; mineral resources; NONFERROUS metals; UNDERGROUND areas; EXPLOSIONS; EARTHQUAKES; ONLINE monitoring systems; EARTHQUAKE aftershocks; ZINC
- Publication
Nonferrous Metals (Mining Section), 2024, Vol 76, Issue 2, p88
- ISSN
1671-4172
- Publication type
Article
- DOI
10.3969/j.issn.1671-4172.2024.02.012