Early warning of rock mass instability based on multi-field coupling analysis and microseismic monitoring
(1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;
2. Fankou Lead-Zinc Mine, Shaoguan 512325, China)
2. Fankou Lead-Zinc Mine, Shaoguan 512325, China)
Abstract: In order to overcome the limitation that rock mass instability warnings are caused by a lack of deep consideration of the inherent mechanism of disaster formation, early warning signs of rock mass instability were detected and multi-field coupling was analyzed. A multi-field coupling model of a damaged rock mass was established. The relationship between microseismic activity parameters and rock mass stability was analyzed, and a multi-parameter early warning index system was established and its solution program was compiled. Based on the D-S data fusion theory, an early warning model of rock mass instability combining multi-field coupling analysis and microseismic monitoring was constructed. Taking an underground mine stope as an object, the multi-field coupling model and its solution program were used to analyze mining response characteristics. The seismic field data were used to verify the accuracy of the multi-field coupling analysis. The early warning model was used to predict the instability of stope rock mass, and the early warning result is consistent with a real-world scenario.
Key words: rock mass instability; microseismic characteristic parameters; D-S evidence fusion; multi-parameter early warning; damage distribution