高海拔石灰石排土场汛期潜在滑移区域的D-InSAR评价研究  

D-InSAR Evaluation of Potential Slip Area in High-altitude Limestone Dump in Flood Season

作　　者：闫斌 董建军 梅媛 刘士乙 YAN Bin;DONG Jianjun;MEI Yuan;LIU Shiyi(Huaxin Cement Co.,Ltd..,Wuhan 430070,China;College of Safety Science and Engineering,Liaoning Technical University,Huludao 125105,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education(Liaoning Technical University),Huludao 125105,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]华新水泥股份有限公司,湖北武汉430070 [2]辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛125105 [3]矿山热动力灾害与防治教育部重点实验室(辽宁工程技术大学),辽宁葫芦岛125105 [4]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《安全与环境工程》2023年第6期162-168,共7页Safety and Environmental Engineering

基　　金：辽宁省自然科学基金项目(2023-MS-313)。

摘　　要：为解决高海拔排土场边坡及周边山体地质灾害的安全稳定性监测困难等问题,以西藏山南桑日县石灰石矿区及其周边山体为研究区域,通过分析西藏山南桑日县2015—2021年每年月降雨量,选取研究区域每年汛期两景Sentinel-1A卫星影像数据,利用合成孔径雷达差分干涉测量(D-InSAR)技术对影像数据进行处理,经过基线估算、差分干涉处理、相位解缠等计算,得到每年汛期研究区域某排土场边坡的地表形变信息,并基于排土场滑坡单一预警准则识别研究区域的潜在滑移区域及滑移量,进而判断该排土场边坡的安全状态以及对下游铁路、居民的影响。结果表明:排土场边坡处于安全稳定状态;2020年汛期研究区域的潜在滑移量为5284.106 m^(3);研究区域内潜在滑移区域Ⅰ、Ⅱ区对下游铁路、居民安全构成一定的威胁,需要对其进行安全隐患排查,潜在滑移区域Ⅲ、Ⅳ区对下游铁路、居民无影响,但对排土场边坡本体稳定性构成一定的威胁,需要对其坡脚等位置进行安全防护;D-InSAR技术能够应用于高海拔排土场边坡潜在滑移点与滑移量的识别。In order to solve the problems such as the difficulty of monitoring the safety and stability of the high-altitude dump slopes and the surrounding mountains for geologic hazards,taking the lime mining area and the surrounding mountains in Sangri County,Shannan,Xizang,as the study area,this paper analyzed the monthly rainfall in the study area,for the period from 2015 to 2021 each year,and selected the Sentinel-1A satellite imagery data of two scenes in the annual flood season in the study area.Synthetic aperture radar differential interferometry(D-InSAR)technology was used to process image data,and after baseline estimation,differential interferometry processing,and phase unwrapping,the surface deformation information of dump slope was obtained in the flood season every year.Based on the single early warning criterion of dump landslide,the potential sliding area and the slip amount in the study area were identified,and the safety status of dump slope and the influence on the downstream railway and residents were determined.The results show that the dump slope is in a safe and stable state.The potential slip in the study area during the flood season in 2020 is 5284.106 m^(3).Potential slip areasⅠandⅡin the study area have posed a certaim threat to downstream railway and residents'safety,which needs to be investigated.Potential slip areasⅢandⅣhave no impact on the downstream railway and residents,but they pose a certain threat to the stability of the dump slope and it is necessary to protect the position of the slope foot and so on.D-InSAR technology can be applied to identify potential slip points and slip amount of high altitude dump slope.

关 键 词：高海拔排土场边坡 地质灾害 隐患点识别 滑移量识别 D-INSAR技术 

分 类 号：X43[环境科学与工程—灾害防治] P642.22[天文地球—工程地质学]