基于多种物探方法的公路下伏采空区病害识别与分析OA

The Bama-Pingxiang Expressway in Guangxi passes through numerous mining areas,and the goaf formed after coal mining cause cracks or collapses in the road.Therefore,accurate detection of the location of the goaf is a prerequisite for ensuring construction safety and driving safety.A comprehensive detection of a suspected goaf was carried out by geological radar method,high-density electrical method and seismic wave scattering method,and geophysical anomaly points were verified by drilling method.The comprehensiveness and reliability of the three geo-physical methods were compared.The research results found that 4 geophysical anomalies were discovered in the survey area,but only 3 defects after verification by drilling method.Among them,no defects were found in 1 bore-hole,which may be caused by errors in geophysical results or inaccuracies caused by"one hole observation";A single geophysical method can cause detection defects.Therefore,detection and analysis should be comprehensively made by geological radar method,high-density electrical method,and seismic wave scattering method.The accuracy of the detection results should be verified by drilling method;According to the drilling results,under the specific in-strument parameters selected in this study,the detection accuracy of high-density electrical method and seismic wave scattering method is higher than that of geological radar method,which can provide guidance for subsequent geophysical research of similar projects.