Time-Dependent Monitoring of Seismic Wave Velocity Variation Associated with Three Major Seismic Events at a Deep, Narrow-Vein Mine

摘要: One of the most difficult challenges in underground mining is to forecast significant seismic events prior their occurrence order support safety miners and minimize damage operation. Passive tomography a tool image velocity changes rockmass, which can potentially reveal rockmass behavior before after event. In this paper, three major are investigated determine whether there identifiable precursory associated with events. Conventional mechanics imply that induced stress at hypocenter would continue increasing until failure, form an event, occurs. With passive we wave distribution within hence infer near hypocenter. This paper evaluates hypothesis (as inferred by p-wave velocity) increases event addition analyzing hypocenter, “zone centers” were also analyzed. These regions consistently have much higher than average for rockmass. It found did not increase any hypocenters occurring, however closest center” two