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Evaluation of goaf safety based on combination weighting and unascertained theory

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  • Beijing JCHX Mine Technology Research Institute Co.,Ltd.|Beijing JCHX Mine Technology Research Institute Co.,Ltd.
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Abstract:

A gold mine,operating with the short-hole shrinkage method for a long time,leaves a large number of goafs.According to the steady state of the current goaf,12 factors including uniaxial compressive strength,integrity coefficient,the exposed area of goafs,and span/height ratio were selected as the predictive index system,and the unascertained measurement model was constructed.A weight calculation method based on AHP-information entropy combination weighting is proposed,and the expert scoring method and linear formula method are used as the measurement function of the qualitative index and quantitative index,finally,the evaluation results are obtained according to the confidence recognition criterion.The research shows that the prediction results are consistent with the actual performance of the onsite goafs,verifying the feasibility of this method and persifying the safety assessment method of goafs.

Keywords:

goaf;stability;AHP;information entropy;combination weighting;unascertained measurement theory