高密度电阻率法和音频大地电磁法在猴场滑坡结构探测中的应用  

Application of high-density resistivity method and audio-frequency magnetotelluric method in the detection of landslide structure in Houchang town

作　　者：刘永亮 张伟[1,2,3] 刘振宇 易连兴 吴秋菊[4] 梁楠 甘伏平 邬健强 韩凯[1,2,3] LIU Yongliang;ZHANG Wei;LIU Zhenyu;YI Lianxing;WU Qiuju;LIANG Nan;GAN Fuping;WU Jianqiang;HAN Kai(Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR,Guilin,Guangxi 541004,China;International Research Center on Karst under the Auspices of UNESCO/National Center for International Research on Karst Dynamic System and Global Change,Guilin,Guangxi 541004,China;Pingguo Guangxi,Karst Ecosystem,National Observation and Research Station,Pingguo,Guangxi 531406,China;Geological Environment Monitoring Station of Guangxi Zhuang Autonomous Region,Nanning,Guangxi 530201,China;Wuhan Center of China Geological Survey(Central South China Innovation Center for Geosciences),Wuhan,Hubei 430205,China)

机构地区：[1]中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室,广西桂林541004 [2]联合国教科文组织国际岩溶研究中心/岩溶动力系统与全球变化国际联合研究中心,广西桂林541004 [3]广西平果喀斯特生态系统国家野外科学观测研究站,广西平果531406 [4]广西壮族自治区地质环境监测站,广西南宁530201 [5]中国地质调查局武汉地质调查中心(中南地质科技创新中心),湖北武汉430205

出　　处：《中国岩溶》2024年第2期441-453,共13页Carsologica Sinica

基　　金：广西重点研发计划项目《漓江流域峰丛谷地水资源安全保障关键技术研发与示范》(编号:2020AB22013);广西重点研发项目《桂中岩溶复杂区页岩气“甜点”预测技术研发》(编号:桂科AB23026062);广西壮族自治区地质环境监测站项目《漓江流域石山区小流域综合整治关键技术研发与示范》(编号:桂自然资函【2021】415);中国地质科学院岩溶地质研究所基本科研业务费项目《管道型含水构造二维大功率充电法正演模拟研究》(编号:2021007)。

摘　　要：文章采用高密度电阻率法和音频大地电磁法对贵州省威宁县猴场滑坡区进行探测,探究从浅部到深部岩溶及裂缝发育情况、岩溶滑坡体底界面形态及滑坡体结构特征。通过音频大地电磁法划分了滑坡区地层结构,发现滑坡区发育浅部和深部两层岩溶,尤其在灰岩与泥页岩界面处的深部岩溶,加之煤层开采形成的采空区,是触发滑坡的背景条件;通过高密度电阻率法探测出的裂缝及岩溶发育区域,是滑坡体进一步位移拉裂的脆弱区。分析认为,岩溶发育破坏了滑坡体原来的整体性,使岩溶山体劣化成零散块体,是导致滑坡的关键因素之一。The frequent occurrence of landslides in China has done great harm to people's lives and property.In the stability analysis of landslides and the design of treatment scheme,the application of geophysical technologies has become a frontier research field in engineering and environment in terms of interdisciplinary development and application.The Houchang landslide in Weining county,Bijie City,Guizhou Province is a typical karst landslide.The landslide area is dominated by karst peak-cluster depressions or gullies,in which limestone strata are widely distributed,and karst is strongly developed.Since the collapse and landslide in 2006,the scale of tensile cracks in rock mass has gradually increased.In order to explore the causes of collapse,scholars have deduced the collapse process,established the conceptual model of landslide and studied the karst hydrogeological conditions.However,due to the lack of detection data,the structural characteristics of landslides have not been fully understood.In this study,the high-density resistivity method and audio-frequency magnetotelluric method were used to detect the landslide area,and the structural characteristics of landslides were revealed from the development of shallow karst and cracks,and the bottom interface of karst landslide.The stratigraphic structure of landslide area was divided by audio-frequency magnetotelluric method,and the lithologic interface between Qixia–Maokou Formation and Liangshan Formation was defined according to the electrical characteristics of different lithologic strata.Furthermore,the clastic rocks of Liangshan Formation in some areas were divided into shale,carbonaceous shale and coal seam.It is found that there are two layers of karst development:one is the karst fracture zone in the shallow part of the karst mountain,which is filled with mud and other low-resistivity substances,and the development depth of the karst layer gradually increases from northeast to southwest;the other is the deep karst fracture zone at the bottom interface of lim

关 键 词：地球物理 岩溶山体 滑坡 高密度电阻率法 音频大地电磁法 

分 类 号：P642.22[天文地球—工程地质学] P631[天文地球—地质矿产勘探]