基于D-InSAR技术的采煤沉陷区地面形变隐患识别与影响分析

Hidden Trouble Identification and Impact Analysis of Ground Deformation in Coal Mining Subsidence Area Based on D-InSAR Technology

本文基于D-InSAR技术,通过SARscape 5.2.1雷达影像处理平台获取了2021年6月至2021年9月鬃岭-勺窝集中采煤区的地表形变信息,同时采用典型形变处最新采空区、采煤巷道数据和野外调查核实方式验证了监测结果的准确性和可靠性。结果表明:(1)本文采用D-InSAR技术成功识别了纳雍县鬃岭-勺窝采煤沉陷区3处地面沉降变形隐患,其影响面积分别为P1处约为0.06 km^(2),P2处约为0.14 km^(2),P3处约为0.07 km^(2);(2)典型沉降区土地利用现状分析表明沉降中心人类活动的强度在缓慢增加,其表现在2017—2021年期间耕地、林地、水体面积减少,居民区、工矿用地、灌木林地以及设施农用地面积增加;重要地类现状实地调查结果表明,典型地面沉降已对居民区房屋道路造成了损坏,对沉陷区生活的人民生命和财产安全造成一定程度的安全隐患。基于此,本文研究D-InSAR技术在岩溶山区集中采煤区地面沉降隐患识别与采矿活动对人类活动的影响为保障矿区人民的生命和财产安全提供了有力的技术支撑,在开采矿区地表环境的整治及人与自然协调发展方面具有一定的现实意义。

Based on D-InSAR technology,the surface deformation information of Zongling-Shaowo centralized coal mining area from June 2021 to September 2021 was obtained through SARscape 5.2.1 radar image processing platform.At the same time,the accuracy and reliability of the monitoring results were verified by the latest data of goaf and coal roadway at typical deformation sites and field investigation and verification methods.The results show that:(1)Three hidden dangers of land subsidence and deformation are successfully identified by D-InSAR technology in Zongling-Shaowo coal mining subsidence area of Nayong County,and the affected areas are about 0.06 km^(2) in P1,0.14 km^(2) in P2 and 0.07 km^(2) in P3,respectively;(2)The analysis of land use status in the typical subsidence area shows that the intensity of human activities in the subsidence center is slowly increasing,which is reflected in the decrease of cultivated land,woodland and water area,and the increase of residential area,industrial and mining land,shrub land and facility agricultural land from 2017 to 2021;The field survey results of important land types show that typical land subsidence has caused damage to houses and roads in residential areas,and has caused a certain degree of potential safety hazards to people’s lives and property in subsidence areas.Based on this,in this paper,it studies the hidden danger identification of land subsidence and the impact of mining activities on human activities by D-InSAR technology in concentrated coal mining areas of karst mountainous areas,which provides a strong technical support for ensuring the safety of people’s lives and property in mining areas,and has a certain practical significance in the regulation of the surface environment of mining areas and the coordinated development of man and nature.