Study on the effect of underground blasting on slope stability based on the AE monitoring

After opencast mining in metal mines for a long time, the shallow ore resources are gradually exhausted. In order to further mine deep resources, mining location is transferred gradually from opencast to underground, and mines will face simultaneously the situations of open-air hanging wall ore mining and underground mining. Under such circumstances, underground mining has great influence on the open-air slope stability. Its influence does not only depend the immediate dominance conditions such as the relative position of the wells and open pit, lithologic conditions and so on, but also depends the indirect factors, such as roadway excavation method, mining method. etc. Among these factors, the underground mining vibration can produce significant affect on the stability of the slope. In this article, the monitoring method of locale field acoustic emission is employed to obtain the parameters of the underground blasting vibration. The blasting energy size and signal propagation rules are analyzed and the open-air slope stability is studied by using FLAC3D code.