Application of Microseismic Monitoring Technology in the Collaborative Mining Process of Caving Method and Backfill Mining Method
The West No.2 mining area of Longshou Mine in Jinchuan is a lean mineral resource area.The mine was originally designed as a downward layered cemented filling method for mining,but in the later stage of production,due to mining cost reasons,the mining of upper section was changed from filling method to sublevel caving method.As a result,a complex situation of simultaneous mining operations between the caving method in the upper section and filling method in the the lower section occurred in the mining area.Due to the significant differences in the activity and distribution characteristics of ground pressure between the caving method and the filling method,in order to ensure the stability of the entire West No.2 mining area,a three-dimensional wrapped microseismic monitoring network was established to achieve comprehensive monitoring coverage for the upper and lower sections of the mining area.At the same time,a user-friendly microseismic safety monitoring platform was independently developed,achieving functions such as automatic identification and classification,high-precision positioning,and automatic warning of microseismic signals.Real-time dynamic monitoring was conducted on the overall stability of the West No.2 mining area using the established microseismic system.The monitoring results show that during the collaborative mining process of the two mining methods,for the upper section mined by caving method,the mining drift in stope is in a stable state,and the cemented filling body on the roof of the mining area collapses and forms a covering layer,and for the lower section mined by filling method,the stope has a overall stable state.
万方数据
维普
