广西探索出老矿山隐蔽致灾因素排查方法

Core Viewpoint - The geological team from Guangxi 272 Geological Team has made significant progress in identifying safety hazards in a long-operating lead-zinc mine in Cengxi City, utilizing advanced technologies to support safe mining operations [1][2] Group 1: Project Overview - The mine, established in the 1960s, covers an area of over 13 square kilometers with underground tunnels extending more than 500 meters below the surface [1] - Approximately 90,000 cubic meters of mined-out areas have been formed, which, while currently stable, pose risks due to complex geological structures and potential hydrological hazards [1] - Electromagnetic interference from underground equipment has presented challenges to traditional detection methods [1] Group 2: Technological Innovations - The project team implemented a "combined detection" approach, utilizing microseismic and spectral ratio methods to capture natural seismic wave signals and accurately map the three-dimensional shape of mined-out areas [1] - Audio electromagnetic depth measurement technology was employed to trace the distribution of faults and fractured zones, complemented by high-density electrical methods and transient electromagnetic methods to identify underground aquifers and flow channels [1] - Remote sensing technology was used to analyze landslide and collapse distributions across the mining area, providing a basis for safety risk assessments of mined-out and collapsed areas [1] Group 3: Achievements and Future Implications - The geological team has completed geological surveys over 13 square kilometers and conducted geophysical exploration over 5 square kilometers, establishing over 3,200 measurement points [2] - Remote sensing technology has preliminarily identified approximately 170,000 square meters of suspected landslide or collapse areas within the 13 square kilometers [2] - The project not only resolves safety issues in the old mine but also develops a methodology for disaster factor investigation suitable for the characteristics of mining areas in Guangxi, which can serve as a valuable reference for the safety production of other old mines [2]