黔西南石漠化地区散点状块石变形机理与InSAR早期识别方法  

Deformation mechanisms and early discrimination method with InSAR technology of scattered block rock in rocky desertification areas of Southwest Guizhou Province,China

作　　者：李先乐 刘东烈 张明[1] 郭金城 杨龙 刘涛 LI Xianle;LIU Donglie;ZHANG Ming;GUO Jincheng;YANG Long;LIU Tao(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China;Guizhou Natural Resources Satellite Application Technology Center,Guiyang 550025,China;Guizhou Beidou Navigation Location Service Center,Guiyang 550025,China)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074 [2]贵州省自然资源卫星应用中心,贵州贵阳550025 [3]贵州省北斗导航位置服务中心,贵州贵阳550025

出　　处：《安全与环境工程》2024年第5期153-162,共10页Safety and Environmental Engineering

基　　金：贵州省第一测绘院科研项目(GZWH-2020-1337);国家自然科学基金项目(41772334)。

摘　　要：在黔西南石漠化地区,普遍存在一种表层发育区域性散点状块石变形但山体整体稳定的现象,造成在利用InSAR技术进行地质灾害隐患点识别时这些变形区往往被误判为滑坡,导致该地区地质灾害InSAR早期识别的准确率很低。以贵州黔西南州兴义市2个典型石漠化地区为例,首先简要概述了石漠化地区的区域构造地质背景和工程地质条件;其次介绍了石漠化地区散点状块石变形识别方法、分布现状及其野外验证方法;然后揭示了石漠化地区散点状块石变形的机理,分析了散点状块石变形容易在InSAR识别中被误判为滑坡隐患的原因;最后根据石漠化地区散点状块石变形的规律,提出了利用InSAR技术特别是PS-InSAR技术在石漠化地区早期识别散点状块石变形的方法。结果表明,该方法提高了石漠化地区InSAR识别地质灾害隐患点的效率和准确率。研究结果对我国其他岩溶地区的地质灾害早期识别具有重要的参考价值。In rocky desertification areas of Southwest Guizhou Province,there is a general phenomenon that the surface layer develops regional scattered block rock deformation,but the whole mountain is stable,which leads to the fact that the identification of hidden danger points of geological disasters by InSAR is often misjudged as landslide,leading to a very low accuracy of early discrimination of geo-hazards in the Southwest Guizhou Province.Taking two typical rocky desertification areas in Xingyi City of Qianxinan Prefecture,Guizhou Province as examples,this paper first briefly summarizes the regional tectonic geological background and engineering geological conditions of rocky desertification areas,then introduces the identification method,distribution status and field verification method of scattered block rock deformation in rocky desertification areas,then reveals the mechanism of deformation of scattered block rock in rocky desertification areas,and analyzes the reasons why deformation of scattered block rock is easily misjudged as a hidden danger of landslide in InSAR identification.Finally,according to the law of deformation of scattered block rock in rocky desertification areas,this paper puts forward a method of using InSAR technology,especially PS-InSAR technology to early identify deformation of scattered block rock in rocky desertification areas.The results show that this method improves the efficiency and accuracy of InSAR in identifying hidden danger points of geological disasters in rocky desertification areas.The research results have important reference value for the early identification of geological disasters in other karst areas in China.

关 键 词：石漠化地区 散点状块石变形 滑坡地质灾害 INSAR 误判 早期识别 

分 类 号：X4[环境科学与工程—灾害防治]