A new model of geo-environmental impact assessment of mining: a multiple-criteria assessment method integrating Fuzzy-AHP with fuzzy synthetic ranking |
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Authors: | Shuangbing Huang Xiao Li and Yanxin Wang |
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Institution: | (1) School of Environmental Studies and MOE Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, Hubei, People’s Republic of China;(2) State Key Laboratory of Geo-hazards Prevention and Geological Environment Protection, Chengdu University of Technology, Chengdu, 610059, Sichuan, People’s Republic of China; |
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Abstract: | A new evaluation model for geo-environmental impact assessment of mining (GEIAM) is proposed. The evaluation framework in
this model considers three groups of criteria, namely, geo-hazards risks, environmental risks, and resource damages. Fuzzy-analytic
hierarchy process (AHP) was used to establish a multiple-criteria evaluation system and simultaneously command weighting to
avoid vagueness and ambiguity in expert judgment. Membership function was employed to deal with the vagueness boundary problem
of indices scoring and to help complete the ultimate fuzzy synthetic ranking. The model expresses the evaluation results with
an integrated objective ranking and three criteria ranking. It was tentatively applied to assess an opencast limestone mine.
The results indicated that the indices sequences were consistent with the mine background and the expert professional experience
and better revealed the impact of geo-hazards risks. Specific assessment factors such as geo-hazards potential, engineering
geological condition, and hydrogeological condition were prioritized for further improvement. Compared with existing GEIAM
evaluation methods, the proposed assessment model focuses more on expert experience and judgment, breaks through the limitation
of local estimation to variable attributes and, most importantly, satisfies the multi-purpose requirements to incorporate
real considerations together for mining safety, geo-environmental protection, and natural resource conservation. |
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