高密度电阻率法在复杂岩溶地区的应用研究  

Study on the application of high-density resistivity method in complex karst area detection

作　　者：李玉[1] 陈宗清 柳倩男 许文学 江巍 Li Yu;Chen Zongqing;Liu Qiannan;Xu Wenxue;Jiang Wei(93204 Unit of the Chinese People′s Liberation Army,Beijing 100077,China)

机构地区：[1]中国人民解放军93204部队,北京100077

出　　处：《工程勘察》2024年第1期72-78,共7页Geotechnical Investigation & Surveying

摘　　要：岩溶地区多存在塌陷安全隐患,严重影响工程建设及使用安全,因此准确探测岩溶的形态特征及填充性质在工程勘察中尤为重要。近年来,高密度电阻率法因其适应性强、采集效率高和显示直观的特点,已经成为岩溶探测的有效手段。本文引入反射系数K剖面法,通过分析其原理及发展,对比了与传统软件RES2DINV的处理效果。并以西南地区某机场工程为例,采用高密度电阻率法中不同装置类型、不同电极距对地下岩溶发育情况进行探测,通过对比分析得到适合该场区的探测方法和参数,同时结合钻孔资料进行综合解释,弥补由点到面的不足。通过本文的实践和验证,高密度电阻率法在复杂地形条件下探测岩溶发育有很好的反映,且斯伦贝谢装置的识别效果比温纳装置更佳,反射系数K剖面法处理后的剖面对岩溶形态特征刻画得更为清晰,为工程的后期勘察和资料处理以及防治措施提供了技术支撑,对于岩溶地区的地质勘察具有良好的应用和参考价值。There are many dangers of collapse in karst area,which will affect seriously on the safety during engineering construction and operation period.In recent years,high-density resistivity method has become an effective means in karst exploration because of its well adaptability,high collection efficiency and intuitive display.The reflection coefficient K-profile method is introduced,its working principle is analysed and the processing effect with traditional software RES2DINV is compared in this paper.The development of underground karst is detected using high-density resistivity method through different types of devices,different electrode distance and treatment methods in an airport construction project in southwest China.After contrast analysis,the suitable detection methods and parameters are obtained,and the borehole data are comprehensively interpreted to make up the deficiency from local to whole area.Through the practice and verification,the high-density resistivity method can well reflect the development of the karst condition of complex topographic area,and the recognition effect of the Schlumberger device is better than that of the Winner device.The section processed by reflection coefficient K-profile method can describe the karst shape more clearly,which provides the technical support for the later investigation,data treatment and prevention measures.It could be applied and referred for geological exploration in karst area.

关 键 词：岩溶 高密度电阻率法 反射系数K剖面法 斯伦贝谢装置 

分 类 号：P631.322[天文地球—地质矿产勘探]