Abstract
In order to quantitatively evaluate the clean degree of coal resources, the evaluation model and the evaluation system are constructed based on multi-factor and multi-hierarchy evaluation index. Two first-tier indexes, five second-tier indexes and sixteen third-tier indexes are adopted according to the content of harmful elements in coal and their toxicity to establish the evaluation index system. The adopted indexes are quantized using statistical mathematical method, and their weights are obtained utilizing the AHP method. Applying the fuzzy mathematics theory, the multi-hierarchy fuzzy comprehensive evaluation model is established, which is a good basement for further conducting the clean degree evaluation of coal resources.
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