相邻工作面开采下的矿区地表沉陷InSAR监测与分析
InSAR monitoring and analysis of surface subsidence in mining area under adjacent mining face
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摘要: 针对相邻工作面重复开采条件下地表形变复杂和常规D-InSAR方法易受时间去相关和大气延迟等因素影响的问题，以东滩煤矿为研究对象，采用SBAS-InSAR方法对40景Sentinel-1A数据进行时序处理，获取了研究区域的年均沉降速率和时序累计沉降量，并对形变特征进行了分析。结果表明：6303相邻工作面的采动对已采工作面影响效果显著，相邻工作面开采条件下地表沉陷速率快、范围广、沉陷盆地形状不规则，6303工作面在走向和倾向上的沉降量差异明显，表现出非对称性特征；InSAR技术能够效监测到矿区相邻工作面开采的地表沉陷现象，可为类似复杂开采条件下的矿区地表形变分析提供技术参考。
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关键词:
- SBAS-InSAR /
- 相邻工作面 /
- 开采沉陷 /
- 沉陷盆地 /
- 特征分析
Abstract: Aiming at the problems that the surface deformation is complex under the condition of repeated mining of adjacent working faces and the conventional D-InSAR method is easily affected by factors such as time decorrelation and atmospheric delay, this paper takes Dongtan Coal Mine as the research object, and adopts the SBAS-InSAR method to process the 40-scene Sentinel-1A data, the annual average subsidence rate and time series accumulated subsidence of the study area were obtained, and the deformation characteristics were analyzed. The results show that the mining effect of 6303 adjacent working face on the existing working face is significant. Under the mining conditions of adjacent working face, the surface subsidence rate is fast, the scope is wide, and the subsidence basin shape is irregular. The subsidence amount of 6303 working face in the strike and inclination is obviously different, showing the characteristics of asymmetry. InSAR technology can effectively monitor the surface subsidence phenomenon of adjacent mining face, which can provide a reference for the analysis of surface deformation in mining area under similar complex mining conditions.-
Keywords:
- SBAS-InSAR /
- adjacent working face /
- mining subsidence /
- basin of subsidence /
- analysis of features
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