Geological disasters such as collapse of tunnel roof or wall and water inrush seriously threaten the life and property safety in the underground mine.It is particularly important to predict the geological conditions ahead before excavation.Based on advanced prediction，the discontinuous structures such as broken zones，weak interlayers and goafs can be found in time. Then， the geological disasters can be greatly reduced under effective measures，which is of great significance to the safe，economic and efficient mining of mines.It is discovered that the No.5 stope in the deep granite porphyry area of an underground gold-copper mine collapsed with a suspected goaf，which caused great potential safety hazards to subsequent production.Tunnel Reflection Tomography （TRT） technology，as a medium and long-distance advanced prediction technology，has the advantages of low-loss materials，convenient operation，safety and stability，and it is currently being gradually promoted and used in mines.In this paper，the TRT6000 system was applied to complex empty areas detection of this gold-copper mine，including 6 detection points distributed in 3 middle sections.Furthermore，a space three-dimensional model was established to make up for the lack of demonstration and observation of the imaging results of the TRT system.By comparing the results obtained from the interpretation of the TRT with the drilling results available，it can be found that the area covered by the borehole is basically consistent with the results of the advanced prediction of the TRT.The established three-dimensional space model intuitively reflects the distribution range of problem area such as broken zone and mined-out area，so that mine producers can have a clearer understanding of the specific situation.The TRT prediction results are basically consistent with the detection drilling results，which proves the feasibility of TRT advanced geological prediction technology in underground mines.The three-dimensional model is innovatively established to visually demonstrate and observe the TRT interpretation results，and achieved a good result.It provides ideas and directions for the visualization of TRT results interpretation.

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http://www.goldsci.ac.cn/article/2022/1005-2518/1005-2518-2022-30-3-333.shtml