Mining area land ecological damage information acquisition method based on multiple data sources

Abstract

The invention relates to a mining area land ecological damage information acquisition method based on multiple data sources, belonging to the technical field of surveying and mapping as well as environmental monitoring. The method comprises the following steps: determining the range of land damage through mining area coal distribution and underground mining information; selecting corresponding satellite remote sensing data according to the range, and processing an image to extract the information of land damage; carrying out analytical photogrammetry processing on satellite image stereo pair and aerial remote sensing stereo pair in an area to be detected so as to obtain settlement crater elevation information; further utilizing ground surface information in a topographic map of mining area and practical land survey data; and finally obtaining land damage information to divide different damage grade maps. The quaternity technology of satellite remote sensing, aerial remote sensing, ground surface information and underground information is coupled together, quick extraction of ecological damage information in mining area land is realized, defects of all damage information are obtained, and basis support is provided for management and control of collapse land.

Description

technical field [0001] The invention belongs to the technical field of surveying and mapping and environmental monitoring, and in particular relates to a land ecological damage information acquisition technology based on satellite and aerial remote sensing, mining subsidence prediction, ground field survey and comprehensive analysis of geographic information. Background technique [0002] Coal is the most important energy source in China. With the rapid development of China's mining industry, its development and utilization play an important role in the development of the national economy, but at the same time, the problems brought about by it have also emerged. The massive extraction of underground coal resources leads to the destruction of the balance and deformation of the overlying strata in the goaf, resulting in different degrees of surface subsidence damage. The forms of surface subsidence damage include: sinking basins, collapse funnels, steps, surface cracks, etc. T...

AI Technical Summary

Problems solved by technology

[0003] There are many technologies currently used for earth exploration, but the land in the mining area has been damaged for a long time and the types of land damage are diverse. It is difficult to fully extract all the ecological damage information of the mining land from a single data source

The remote sensing technology that emerged in the 1960s has the characteristics of macroscopic, high-resolution, high-precision positioning and repeatable dynamic monitoring, which can quickly and periodically provide a large amount of relevant information on the earth's surface, enriching and expanding the conventional The insufficiency and defects of field measurement data make it possible to monitor rapid and dynamic changes in resources and environments. However, the early low-resolution images have low precision and cannot obtain elevation information. The recent high-resolution images can obtain accurate ground object information, but for It is difficult to determine the subsidence area outside the water body

Aerial imaging is also a detection technology that has only been applied in recent years. It has high precision but high cost and poor timeliness.

The accuracy of topographic map drawing is high, but the high cost cannot be applied in a large area

However, the subsidence prediction method widely used at present, although the accuracy of the obtained subsidence area is high, the ground information has not been considered.

[0004] To sum up, due to the diversity of land damage types in mining areas, the above-mentioned single information acquisition methods cannot obtain all damage information on land in mining areas.

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