Application research on Offset Tracking technology in monitoring oflarge surface deformation in coal mine subsidence area
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摘要: 针对传统煤矿沉陷监测方法存在监测周期长、提取的矿区地表变形量准确率不高的问题，提出将Offset Tracking技术应用到煤矿沉陷区地表大变形的监测中。以张双楼煤矿作为研究对象，应用Offset Tracking技术对该煤矿沉陷区的SAR影像进行处理，采用互相关系数过采样因子法建立地形起伏与噪声偏移量模型，使用最小二乘模拟轨道偏移分量，获取了矿区方位向和距离向的二维变形图和矿区变形信息。利用实测数据对Offset Tracking技术的监测结果进行评价，结果表明，利用Offset Tracking技术监测到的矿区最大沉降位置和变形方向与实测数据基本一致，误差仅为1 cm，说明Offset Tracking 技术能够准确、有效地监测煤矿沉陷区地表大变形，为煤矿沉陷区的合理治理提供依据。
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关键词:
- 煤矿沉陷区 /
- 变形监测 /
- 偏移分量 /
- 互相关系数过采样因子法 /
- Offset Tracking /
- D-InSAR
Abstract: In view of problems of long monitoring cycle, low accuracy of extracted deformation quantity of surface shape existed in traditional coal mining subsidence monitoring methods, Offset Tracking technology was applied to monitoring of large deformation of coal mine subsidence area. Taking Zhangshuanglou Coal Mine as research object, the Offset Tracking technology was used to deal with SAR images of the coal mine subsidence area, two-dimensional deformation figure and the mining deformation information in distance and azimuth direction were obtained by adopting method of cross-correlation factor and over sampling to establish terrain fluctuation and noise offset model, and using the least square method to simulate track offset component. The monitoring results of using the Offset Tracking technology was evaluated with measured data. The results show that the maximum subsidence location and deformation direction of the mining area which monitored by the Offset Tracking technology are consistent with the measured data, and the error is only 1 cm. The results show that the Offset Tracking technology can accurately and effectively monitor the large deformation of coal mine subsidence area, and can provide basis for rational control of coal mine subsidence area. -
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期刊类型引用(13)
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