基于InSAR技术的辽宁省本溪市南芬铁矿滑坡形变时空特征及触发因素分析  

Spatiotemporal Characteristics and Triggering Factors Analysis of Landslide Deformation in Nanfen Iron Mine Based on InSAR Technology

作　　者：殷宗敏 何文熹 柳潇 刘学浩 YIN Zong-Min;HE Wen-Xi;LIU Xiao;LIU Xue-Hao(Wuhan Center,China Geological Survey(Geosciences Innovation Center of Central South China),Wuhan 430205,Hubei,China)

机构地区：[1]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：《华南地质》2024年第3期574-582,共9页South China Geology

基　　金：国家自然科学基金项目(42107485)。

摘　　要：辽宁省本溪市南芬露天铁矿区滑坡灾害频发,对其滑坡进行研究具有示范作用。本文利用DInSAR和PSInSAR技术对矿区坡体进行形变计算,结合降雨和构造数据进行分析,得出如下结论:(1)DInSAR结果表明矿区坡体视线方向和垂直方向形变明显,水平方向形变呈现向西南滑动,且滑动幅度大于垂直方向,沿最大坡度方向存在明显沉降,PSInSAR结果表明坡体在2021年4月8日至2021年8月18日间呈现明显下滑;(2)矿区滑坡体形变与降雨存在较强的正相关,相关系数达0.93;(3)随着高度的降低,坡体滑坡沉降速度呈现增加趋势。本研究表明InSAR技术对南芬露天铁矿区滑坡进行监测效果较好。The Nanfen open-pit iron mine area of Benxi city,Liaoning province,experiences so frequent landslides to be focused.DInSAR and PSInSAR techniques are used to calculate deformations of the mine slope and analyzes the results in conjunction with rainfall and structural data.The conclusions are as follows:(1)DInSAR results indicate that the slope deformation in the mine area is significant in both the line-of-sight and vertical directions,with horizontal deformation showing a southwest sliding trend,and the sliding amplitude being greater than that in the vertical direction.The maximum slope direction shows significant subsidence.PSInSAR results indicate that the slope exhibited significant sliding between April 8,2021 and August 18,2021.(2)There is a strong positive correlation between slope deformation and rainfall,with a correlation coefficient of 0.93.(3)As elevation decreases,the rate of slope landslide subsidence increases.This study demonstrates that InSAR technology is highly effective for monitoring landslides in the Nanfen open-pit iron mine area.

关 键 词：南芬铁矿 滑坡 DINSAR PSINSAR 降雨 

分 类 号：P694[天文地球—地质学]