频谱激电法在铜陵市某滑坡地段滑动面勘探中的应用  

The Application of Spectrum IP Method to Exploration of the Sliding Surface at a Landslide Area in Tongling City

作　　者：罗传华[1,2] 昌彦君[2] 李志华[3] 洪瑾[2] 赵顺杰 

机构地区：[1]安徽省地矿局321地质队,安徽铜陵244031 [2]中国地质大学地球物理与空间信息学院,湖北武汉430074 [3]中国地质大学自动化学院,湖北武汉430074 [4]资阳金贝科技有限公司,四川资阳641300

出　　处：《工程地球物理学报》2017年第1期26-30,共5页Chinese Journal of Engineering Geophysics

摘　　要：基于滑坡的发生常和水的作用有密切的关系,并且滑坡中的电性参数分布和滑坡产生的电场异常都和稳定边坡有明显的不同,用频谱激电法研究滑坡存在良好的地质—地球物理前提。因此,针对勘探区含水地层电阻率和电化学活动性要素进行了分析,并开展了频谱激电法进行滑动面探测的试验研究。综合该地区边坡工程地质岩性特征和频谱激电法提供的物性信息,初步推断该滑坡体平均厚约25m,滑动界面深度在30~40m处,滑动面与岩体结构面之间的关系为顺层滑坡关系,类型属于叠瓦状岩质滑坡。Based on that the action of water has a close relationship with the occurrence of landslide,the paper analyzes the elements of the water-bearing formation resistivity and electrochemical activity in the exploration region and makes use of spectrum IP method to conduct the experimental research on the detection of the sliding surface. The distribution of landslide＇s electrical parameters and electric field anomalies produced from the landslide are significantly different with stable slope. Therefore, using the method of the spectrum IP to study landslide is good geological and geophysical prerequisite. In view of the geolog-ical lithology characteristics of slope engineering in the region and the physical information provided by frequency IP method,we can conclude preliminarily that the thickness of land-slide is about 25 meters on average, the depth of the sliding interface in 30 to 40 meters,and the relationship between the sliding surface and the structural plane of rock mass is bedding landslide,the type of which belongs to the imbricated rock landslides.

关 键 词：滑坡 地质灾害 频谱激电法 滑动面 视充电率 

分 类 号：P631.3[天文地球—地质矿产勘探]