Application of comprehensive geophysical exploration in detection of mined area under Zaomu highway

In order to accurately detect the location and condition of goof while failing to grasp the details.In the case of Zaomu highway under goaf,using high density resistivity imaging method,high resolution seismic sonar and acoustic detection method to determine its location,then exploration and drilling result contrast analysis to determine goaf.The results show that: the north and south sides of Expressway central axis 50m range,the detection area K3+580 ~ K3+830 section,a depth of 75 ~ 90m range goaf is widely distributed.According to the corresponding relation of the mining area and the caving zone,we can be infer the gob space at heights of 3 to 8 meters.On the survey of mined-out area location and its characteristics,this paper puts forward the corresponding treatment measures.The joint determination method is accurate and reliable,which can provide reference for the similar engineering in the future.