Stability Evaluation Model of Tunnel Surrounding Rock Based on Multidimensional Connection Cloud
In order to improve the accuracy of surrounding rock stability assessment in underground metal mine tunnels,based on engineering practice,five typical influencing factors were selected to construct an evaluation index system for surrounding rock stability.The improved Analytic Hierarchy Process and the improved CRITIC method were used to calculate the subjective and objective weights of the indicators,based on game theory ideas,A comprehensive evaluation model for the stability of surrounding rock in underground metal mine tunnels was established by determining the optimal comprehensive weight of indicators and combining it with the theory of multidimensional connection cloud model.Using 14 domestic tunnel projects as sample data for model verification,and comparing them with fuzzy synthesis,matter element extension discrimination results,and actual situations.Finally,the model is applied to the stability evaluation of the surrounding rock of a given gold mine roadway.The research results show that the stability evaluation results of underground metal mine roadway surrounding rock based on game theory multi-dimensional connection cloud are completely consistent with the conclusions of on-site investigation,verifying the feasibility and effectiveness of this model in evaluating the stability of roadway surrounding rock.It can provide an accurate and quantifiable new approach for evaluating the stability of underground metal mine roadway surrounding rock.
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