物探方法组合在岩溶区地面塌陷勘查中的应用  

Application of geophysical prospecting method combination in the exploration of ground subsidence in karst area

作　　者：李星 刘海飞[1,2] 柳建新 汪强强[1,2] 施昕祎 LI Xing;LIU Haifei;LIU Jianxin;WANG Qiangqiang;SHI Xinyi(School of Geosciences and Info-Physics, Central South University, Changsha 410083,China;Key Laboratory of Non-ferrous Resources and Geological Detection,Ministry of Hunan Province, Changsha 410083, China)

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]有色资源与地质灾害探查湖南省重点实验室,长沙410083

出　　处：《物探化探计算技术》2021年第1期108-115,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41774149,41174102)。

摘　　要：地面塌陷是岩溶发育区内常见且破坏性较强的地质灾害,针对地面塌陷的分布特征和自然因素开展浅层非侵入性综合地球物理勘查研究,可为后期灾害应急防治提供可靠的依据,对减少人民生命和财产的损失具有重要意义。这里将探地雷达和高密度电法结合起来研究工作区内溶洞的发育情况及充填状态,并评价其沉降与塌陷的风险。通过数据采集、资料处理、异常推断解释及钻探验证等研究过程,验证了探地雷达与高密度电法相结合在岩溶区地面塌陷勘查中的有效性,地质雷达探测方法操作简便、探测精度高,但探测深度有限,而高密度电法探测深度相对较大,但易受场地障碍物影响导致断面数据缺失,二者相结合起到了相互补充、相互验证的作用。Ground collapse is a common and highly destructive geological disaster in karst development areas.Carrying out shallow non-invasive comprehensive geophysical investigation and research on the distribution characteristics and natural factors of ground subsidence can provide a reliable basis for later disaster emergency prevention and control.Reducing the loss of people's lives and property is of great significance.We combine ground penetrating radar and high-density electrical methods in this article to study the development and filling status of karst caves in the work area,and evaluate the risk of settlement and collapse.Through the data acquisition,data processing,anomaly inference interpretation and drilling verification and other research processes,the effectiveness of the combination of ground penetrating radar and high-density electrical method in the ground subsidence survey in karst area are verified.However,the detection depth is limited,and the high-density electrical detection depth is relatively large,but it is easily affected by site obstacles and leads to the lack of cross-section data.The combination of the two plays a complementary and mutual verification role.

关 键 词：岩溶 地面塌陷 物探方法组合 高密度电法 探地雷达 

分 类 号：P631.3[天文地球—地质矿产勘探]