Application of microtremor survey method in typical karst exploration in the Yantai area

Abstract:

As a typical karst development area， the Yantai area faces significant challenges to engineering safety due to its complex geological structures and hidden karst formations. Traditional exploration methods （e.g.， drilling， ground-penetrating radar） are constrained by limitations such as insufficient resolution， high costs， or restricted applicability， making them inadequate for refined detection needs. This study focuses on the microtremor survey method and addresses the complexity of karst development in the Yantai area. The research team selected a reasonable and feasible microtremor detection array layout scheme， employed the microtremor spectral ratio method to analyze the stratum structure， and verified the results using geological drilling data. Systematic investigations demonstrate the method’s applicability and technical advantages in karst exploration. Field applications confirm its effectiveness in identifying buried caves and karst collapse hazards， significantly enhancing the detection accuracy.