Application of transient electromagnetic method and microtremor survey technology in mine goaf detection

Accurate detection of mine goafs is of great significance for safety production and hazard prevention and control. Taking a lead-zinc mine goaf as the research object, this study employs the Transient Electromagnetic Method (TEM) and Microtremor Survey technique, integrated with geological and roadway data, to establish a dual-parameter coupling model based on "electrical properties-wave velocity" for identifying the spatial distribution and structural characteristics of goafs. Through anomaly fusion analysis and drilling verification, unfilled goafs, backfill areas, and rock fracture zones were accurately delineated, and the formation response patterns under mining-induced influence were revealed. The results demonstrate that the synergistic application of TEM and Microtremor Survey can effectively improve the accuracy and reliability of goaf detection, providing a scientific basis for mine hazard control and ecological restoration.