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Method for rapidly recognizing INSAR (interferometric synthetic aperture radar) image of subsidence region in coal mining

A technology of coal mining subsidence area and identification method, which is applied in the field of land subsidence monitoring in coal mining areas to achieve the effect of high resolution and wide monitoring range

Inactive Publication Date: 2018-11-13
SHANDONG AGRICULTURAL UNIVERSITY
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Problems solved by technology

However, the old INSAR technology is limited by factors such as space-time decoherence and atmospheric effects, and there are still many defects in accurately monitoring surface subsidence in coal mining subsidence areas.

Method used

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  • Method for rapidly recognizing INSAR (interferometric synthetic aperture radar) image of subsidence region in coal mining
  • Method for rapidly recognizing INSAR (interferometric synthetic aperture radar) image of subsidence region in coal mining
  • Method for rapidly recognizing INSAR (interferometric synthetic aperture radar) image of subsidence region in coal mining

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] In this example, in combination with the situation that the coal mining subsidence area is very dangerous and the monitoring is urgent, according to the technical characteristics of Sentinel-1 satellite images and SBAS, taking Jining City, Shandong Province as an example, the images from July 2015 to July 2017 were selected. Using SBAS-INSAR technology to monitor the deformation dynamic evolution of the surface time series in the study area. The specific process of this technical method is as follows:

[0028] ① Data preprocessing: Select 16 scene image data of the same polarization mode (VV mode) during the study period, cut the images according to the vector range of the study area to obtain the case study area, obtain the multi-temporal SLC data of the study area; download the latest coverage of th...

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Abstract

The invention discloses a method for rapidly recognizing an INSAR (interferometric synthetic aperture radar) image of a subsidence region in coal mining and belongs to the technical field of surface subsidence monitoring of the coal district. The method comprises steps as follows: S1, data preprocessing; S2, generation of a connection diagram; S3, interference processing; S4, track refining and deduplication; S5, SBAS (small baseline subset) deformation estimation; S6, SBAS deformation estimation refining; S7, geocoding; S8, result analysis. According to the method, in combination with the situation of great damage of the subsidence region in coal mining and strong monitoring urgency, the deformation dynamic evolution of the time sequence of the ground surface of the research area is monitored with an SBAS-INSAR technology. On the basis of the SBAS-INSAR technology, the range and the vertical change rate of the subsidence ground surface in coal mining can be rapidly and accurately monitored, and the method is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of ground subsidence monitoring in coal mining areas, and relates to a method for quickly identifying INSAR images in coal mining subsidence areas. Background technique [0002] At present, 80% of China's electric energy and 70% of total energy come from coal, and 6 million tons of raw coal are consumed every day. The large-scale mining of coal resources has destroyed the stability of the overlying strata, leading to surface collapse, subsidence and subsidence, which seriously threaten social and economic stability and the personal safety of citizens. Rapid and accurate monitoring of the scope and subsidence rate of coal mining subsidence areas can provide support for the construction of ecological civilization and regional ecological restoration. [0003] my country's traditional land subsidence monitoring technology in coal mining areas still mainly relies on field geodetic leveling, GPS surveying and tot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C5/00G01S19/01
CPCG01C5/00G01S19/01
Inventor 于新洋周晶晶李新举牛蓓蓓闵祥宇焦赫丁冰岚
Owner SHANDONG AGRICULTURAL UNIVERSITY