高密度电阻率法在山东莱州小浞河铁矿采空区勘查中的应用

Application of the High-Density Resistivity Method in Detecting a Mined-Out Area in the Xiaozhuohe Iron Deposit of Laizhou City,Shandong Province

本文基于基础资料收集,通过高密度电阻率法并结合钻探验证工程,对山东莱州小浞河铁矿开采形成的采空区进行勘查。勘查成果表明,因充水,小浞河铁矿采空区电阻率值明显低于周围岩层,在高密度电法视电阻率反演断面图上均表现为漏斗状低阻异常,并且异常体分布相对规则、连续,与磁铁矿体及其采准巷道工程较一致。经钻探工程进一步验证,物探解译推断的采空区位置与钻探揭露深度较为吻合,表明高密度电阻率法在铁矿采空区勘查中具有较高的可行性和实用性。基于Voxler软件平台,综合基础地质资料以及钻探验证结果等,对高密度电法测量成果三维可视化可有效快捷地圈定采空区范围,为进一步的灾害防治提供有利依据。

Based on available basic data,this work detected a mined-out area in the Xiaozhuohe iron deposit using the high-density resistivity method combined with drilling verification.The results show that this mined-out area is characterized by notably lower resistivity values than the surrounding rocks because of water filling.The funnel-like low-resistivity anomalies appear in the profiles of apparent resistivity inversion,which are distributed relatively regularly and continuously,largely consistent with the magnetite orebody and its preparatory workings.The further drilling verification reveals that the location of mined-out areas,inferred from interpretation of high-density resistivity data,is in accordance with that by drilling,indicating that the high-density resistivity method is feasible in exploring mined-out areas of iron mines.This work demonstrates that combining basic geological data and drilling verification permits to delineate mined-out areas effectively and quickly by the 3D visualization of high-density resistivity data based on software Voxler,providing a basis for further disaster prevention and control.