Application of High Density Electrical Methodin Exploration of Blind Underground Cavity of An Antimony Mine
In view of the technical problems of incomplete geological data of blind goaf left by disorderly mining in the early stage of metal mines,the location and spatial form of goaf are difficult to determine.Taking an antimony mine as the research object,the high-density resistivity method is used as the technical means to carry out the blind goaf exploration test in the+325 level of the antimony mine.The results show that the combination of the characteristics of the blind goaf and the existing geological data and the inversion results of the high-density resistivity method can accurately identify the goaf anomaly.According to the topographic and hydrogeological data,the terrain slope of the detection area is large,the rock stratum is steep,the fracture is developed,and there is little water accumulation above the elevation of+325 m,which is consistent with the geophysical inference of the abnormal resistivity characteristics of the goaf.Finally,16 goaf anomalies are inferred,and the total area of each abnormal plane is 9 856 m2.The volume of goafis estimated to be about 73 382 m3,of which the volume of goaf without water accumulation is about 50 121 m3.This study can provide reference for mines with similar goaf exploration.
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