Study on improved AHP-TOPSIS method for stability evaluation of underground complex steeply inclined goaf
In order to accurately evaluate the stability of underground steeply inclined goaf,an improved analytic hierarchy process combined with technique for order preference by similarity to ideal solution(AHP-TOPSIS)method for the stability evaluation of underground complex steeply inclined goaf was proposed.Based on the correlation analysis between various in-fluencing factors,an evaluation index system of goaf was established by selecting 3 first-level indexes(geological factor et al.)and 14 second-level indexes(geological structure et al.).The improved AHP method was used to determine the weight of each index factor.The stability grade of goaf was evaluated by the TOPSIS theory,and the evaluation results of the improved AHP-TOPSIS method were compared with other commonly used methods through case analysis.The results show that through the improved AHP-TOPSIS method,it is obtained that the steeply inclined goaf is in a stable state,which is consistent with the on-site actual project.The improved AHP-TOPSIS method is more reliable and superior compared with other methods.The research results can provide a reference for the accurate evaluation on the stability of steeply inclined goaf.
steeply inclined goafstability evaluationimproved AHP-TOPSIS methodevaluation index