| Technology Application |
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Spatial-temporal evolution analysis of mining geological environment based on RS and GIS: A case study of the Dongsheng ore district |
| LI Xueyuan1, ZHAO Bo2, CHEN Shilei1, ZHAO Yingwang1, BIAN Kai1 |
1. College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
2. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China |
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Abstract During the coal mining, various geological environmental problems may be inevitable. In this study, the QuickBird images in 2007 and the WorldView2 images in 2012 from the Dongsheng ore district of Inner Mongolia were selected respectively as original and end data sources so as to extract the present environment information. After that, the areal increase and rate of different mine geological environment, the transfer matrix of environmental types, and the spatial-temporal change of environmental types were calculated or revealed. In addition, with the mining right as the spatial unit, the environmental areas were calculated by virtue of average annual increase and comprehensive dynamic degree, both of which can describe the spatial evolution trend. The results show that different environment are enlarged in different degrees year by year with the expansion of the exploitation range, while the transfer trend from "pollution" (mining pit, dump and water accumulated area) to "management"(restoration region and industrial square)is similarly significant. Although the mine ecological recovery, which appears to be better in northwest area than in southeast area, has been given more attention, the environmental recovery pace remains in general slower than the speed of the environmental pollution, which adversely affects the sustainable development.
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| Keywords
level set theory
gradient descent method
coastline
contour information
feature extraction
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Issue Date: 02 March 2015
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2015,
Vol. 27
