In order to detect the collapsed column in the recovery mining face, a combination of object detection and drilling verification was used to identify the range, size and water-filling capacity of the collapsed column. In the case of Fenghuangshan Mine, the detection of the collapsed column in the mine's XV5302 face was first applied to identify the anomalous zone by means of geophysical prospecting, and then combined with drilling to verify the accuracy of the collapsed column range. The workings of the XV5302 face showed that the circled collapsed column was highly accurate, and a reasonable solution was determined for future detection and recovery when the working face encountered collapsed column again, with improved mining rate.