基于SBAS-InSAR的西部开采沉陷超前影响角反演研究  

Research on Angle Parameters of Western Mining Area Based on SBAS-InSAR Technology

作　　者：周健 周大伟[1] 安士凯 詹绍奇 刁鑫鹏[1] ZHOU Jian;ZHOU Dawei;AN Shikai;ZHAN Shaoqi;DIAO Xinpeng(School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;Ping'an Coal Mining Engineering Technology Research Institute Co.,Ltd.,Huainan 232033,China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]平安煤炭开采工程技术研究院有限责任公司,安徽淮南232033

出　　处：《金属矿山》2023年第4期168-173,共6页Metal Mine

基　　金：国家自然科学基金项目(编号:52104174);江苏省自然科学基金项目(编号:BK20190642);宁夏回族自治区重点研发计划项目(编号:2022CMG03065)。

摘　　要：煤矿开采沉陷超前影响角的反演需要动态监测数据,传统观测手段在矿区大范围、长时间序列的动态监测存在劳动强度大、数据量少等问题。以西部鄂尔多斯色连二煤矿12314工作面为例,利用SBAS-InSAR技术解算21景Sentinel-1A数据得到2020年9月至2021年8月该工作面的动态沉陷盆地边界,通过联合工作面回采进度反演超前影响角和边界角,并分析了西部矿区开采沉陷超前影响的特性。得出以下结论:在非充分采动时,超前影响角随着开采范围的增大而减小,由55°减小到44°;当达到充分采动后,超前影响角开始出现了增大的趋势,由44°增大到68°;当地表达到稳沉后,此时超前影响角等于边界角,稳定在68°。西部矿区超前影响角呈现出不同于常规的变化特性:即达到充分采动后,超前影响角出现增大的变化趋势。经分析认为,与西部矿区弱胶结覆岩前期易崩塌,后期易压实的特性有关;非充分采动时,覆岩垮落发育偏高,空隙存于岩体内部,地表沉陷缓和;当达到充分采动后,存于岩体内部的空隙被快速压实传递到地表,使地表沉陷加速,甚至出现切落式下沉,导致超前影响角增大(即超前影响范围减小)。该研究成果为西部矿区开采地表建(构)筑物等设施的动态保护提供重要的参考意义。Dynamic monitoring data is required for the inversion of the advanced influence angle of coal mining subsidence.Traditional observation methods have problems such as high labor intensity and small amount of data in the dynamic monitoring of large-scale and long-term sequences in mining areas.In this paper,taking the 12314 working face of the Erdos Selianer Coal Mine in the west as an example,the dynamic subsidence basin boundary of the working face from September 2020 to August 2021 was obtained by using the SBAS-InSAR technology to solve the Sentinel-1A data of 21 scenes.The advance influence angle and boundary angle were inverted by the mining progress,and the characteristics of the advance influence of mining subsidence in the western mining area were analyzed.The following conclusions are drawn:When the mining is not fully mined,the leading influence angle decreases with the increase of the mining range,from 55°to 44°;When the mining is fully mined,the leading influence angle begins to increase The trend of,increases from 44°to 68°;After the local expression becomes stable,the leading influence angle is equal to the boundary angle and stabilizes at 68°.The advance influence angle in the western mining area presents a change characteristic different from the conventional one:that is,after the full mining is achieved,the advance influence angle has an increasing trend.According to the analysis,it is related to the characteristics that the weakly cemented overlying rock in the western mining area is easy to collapse in the early stage and easy to be compacted in the later stage;when the overlying rock is not fully mined,the collapse of the overlying rock is relatively high,the voids are stored in the rock mass,and the surface subsidence is alleviated;After sufficient mining,the voids existing in the rock mass are rapidly compacted and transferred to the surface,which accelerates the surface subsidence,and even occurs in a cut-and-fall subsidence,resulting in an increase in the advance influence angle(that i

关 键 词：西部矿区 SBAS-InSAR 动态移动盆地 移动边界 超前影响角 

分 类 号：TD325[矿业工程—矿井建设]