富水构造异常体的直流电阻率法超前探测分析  

Advanced detection analysis of water-rich structural anomalies by DC resistivity method

作　　者：姚陈飞 王国富 李红立 YAO Chenfei;WANG Guofu;LI Hongli(School of Automation,Guangxi University of Science and Technology,Liuzhou 545616,China;School of Electronic Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China)

机构地区：[1]广西科技大学自动化学院,广西柳州545616 [2]广西科技大学电子工程学院,广西柳州545006

出　　处：《广西科技大学学报》2023年第4期48-53,共6页Journal of Guangxi University of Science and Technology

基　　金：国家自然科学基金项目(61761009)资助。

摘　　要：直流电法超前探测技术是隧道掘进工作面超前预报的重要手段之一,为研究异常体变化对直流电阻率法超前探测效果的影响,建立几种含水低阻地质异常体三维模型,采用三极法探讨了在三维空间中不同距离、不同大小、不同方位、不同测线布置下的低阻地质异常体直流电法超前探测响应特征,以及地质异常体与围岩之间电阻率差异变化对于直流电阻率法超前探测的影响。研究结果表明:当异常体体积越大,距离掘进面越近,异常体与围岩之间电阻率差异越大;异常体位于掘进面正前方不发生偏移时,直流电法对异常体的响应越明显,三极法得到的探测效果越好;当异常体位于不同方位,相应的测线也位于该方位时,得到的探测效果最好,可以有效避免对隧道的影响。Direct current(DC)advanced detection technology is one of the important means of advanced prediction of tunnel facing.In order to study the influence of anomalous changes on the advanced detection effect of DC resistivity method,several three-dimensional models of water-bearing low-resistance geological anomalies were established,and the tripolar method was used to explore the response characteristics of the advanced detection of low-resistance geological anomalies under different distances,sizes,orientations and line arrangements in three-dimensional space,and the influence of the change of resistivity difference between geological anomalies and surrounding rock on the advanced detection of DC resistivity method.The results show that the larger the volume of the anomaly and the closer to the boring surface,the greater the resistivity difference between the anomaly and the surrounding rock.When the anomaly is located directly in front of the boring surface and does not shift,the more obvious the response of the direct current method to the anomaly,the better the detection effect obtained by the tripolar method.When the anomalies are located in different orientations and the corresponding measurement lines are also located in this orientation,the detection effect is the best,which can effectively avoid the impact on the tunnel.

关 键 词：直流电法 超前探测 低阻地质异常体 数值模拟 

分 类 号：U456.32[建筑科学—桥梁与隧道工程] U452.11[交通运输工程—道路与铁道工程]