Application of comprehensive geophysical prospecting in investigation of coal mine goaves

There are many small coal mine goaves in Huazi Town-Xidayao Town in Dengta City, Liaoyang City, Liaoning Province. They are distributed in villages and towns and their surrounding areas, posing great threats to the ground buildings and resident life. Furthermore, the vegetation around the mining area is sparse, and a large amount of coal slag has been piled up at will, which causes serious damage to the ecological environment. However, owing to the limitations of a single geophysical method, it is difficult to completely eliminate interference and observation errors through the goaf investigation using a single geophysical method. Based on the selection and exploration of geophysical methods from the aspects of anti-interference and effectiveness, this study conducted the coal mine goaves in the study area by applying the geophysical prospecting methods including gravity survey, high-density resistivity method, and shallow seismic reflection method. As verified through drilling, ideal results were achieved.