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Evaluation of ecological restoration effect of large waste dump in Xuejiawan-Longkou open-pit coal mine based on AHP-TOPSIS method |
CHAI Chenhui, QIN Yueqiang, WANG Zhimin, SUN Yufei, LI Pengwei, XIN Kai, ZHANG Xin |
Langfang Center for General Survey of Natural Resources, China Geological Survey, Hebei Langfang 065000, China |
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Abstract Waste dump restoration is one of the key points restricting the breakthrough progress of mine ecological restoration. In order to further optimize the technical combination of waste dump ecological restoration, and support mine ecological restoration and green mine construction, the authors in this paper chose 5 waste dump sectors with different restoration technologies as the study case. Nine evaluation indexes in the categories of ecological benefit and economic benefit were selected and AHP and TOPSIS methods were used to construct a comprehensive evaluation system and determine the final weight and conduct comprehensive evaluation. The results showed that the optimal solution for waste dump restoration in the study area was using the engineering measures as flat soil covering + water retaining cofferdam + slope shaping + strip seeding technology, and the vegetation measures as willow + cladawang + grass luteus + alfalfa + ice grass + laomangmai. During the process of mine ecological restoration effect evaluation, using the qualitative and quantitative evaluation methods could better reflect the ecological restoration effect and provide support for the scientific evaluation of ecological restoration effect.
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Received: 27 February 2023
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