基于时序InSAR的改进型PIM矿山采空区沉降模型构建与应用  

Construction and application of an improved model in monitoring subsidence around mined-out area based on timing InSAR

作　　者：毛嘉骐 李素敏[1] 成睿 张龙宇 沈显名 Mao Jiaqi;Li Sumin;Cheng Rui;Zhang Longyu;Shen Xianming(College of Land and Resources Engineering,Kunming University of Science andTechnology,Kunming Yunnan 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《化工矿物与加工》2023年第9期32-38,共7页Industrial Minerals & Processing

基　　金：国家自然科学基金项目(41961053,41861054);云南省重点研发计划项目(202003AC100002);云南省科技厅面上项目(202101AT070102)。

摘　　要：利用InSAR监测矿山采空区地表沉降的过程中易在沉降中心周围产生失相干现象,导致形变结果缺失,无法获取准确的沉降区模型。基于此,提出了一种结合时序InSAR与PIM(Probability Integral Method)的监测方法,以云南省玉溪市大红山铁矿地下采区某工作面为研究对象,首先计算出时序InSAR累积沉降量,并提取其沉降区边缘的高相干点,结合少量沉降中心水准点,利用改进型PSO(Particle Swarm Optimization)算法获取PIM参数,并通过克里金插值法建立采空区地表整体沉降区模型,利用少量水准点数据对该方法的可靠性和精度进行验证,结果表明,该方法获得的沉降区分布与实际相吻合,其沉降区监测精度比单独使用时序InSAR或PIM的更高,可用于矿区地表沉降信息的准确获取。In the process of using InSAR(Interferometric Synthetic Aperture Radar)to monitor the ground subsi-dence around mined-out area,the coherence around the subsidence center was not able to be achieved,thus deformation results were not available and the accurate subsidence model could not be established.Because of this,a novel approach combining timing InSAR with PIM(Probability Integral Method)was proposed.Focusing on a working face in the underground mining area of Dahongshan Iron Mine in Yuxi city,Yunnan province,Firstly,the cumulative subsi-dence with timing InSAR was calculated,the high coherence points at the edge of the subsidence area were picked up,in conjunction with a little leveling points around the subsidence center,the modified PSO(Particle Swarm Optimization)algorithm was employed to obtain parameters based on probability integral method,the overall subsidence model throughout the mined-out area by Kriging interpolation method can be established.The reliability and accuracy of the approach was verified with a small amount of leveling point data,The results show that the distribution of subsidence acquired by use of this method was consistent with the facts,and the subsidence monitoring results were of higher accuracy than that from either timing InSAR or PIM only.This new method can be used to obtain accurate ground subsidence information from the mining areas.

关 键 词：时序InSAR 改进型PSO PIM 地表沉降 形变监测 沉降模型 

分 类 号：TD327[矿业工程—矿井建设] TP79[自动化与计算机技术—检测技术与自动化装置]