基于GABP优化模糊测度方法的节理化露天矿边坡稳定性分析

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中图分类号：TD325 文献标志码：A

Stability analysis of jointed open-pit mine slopes based on GABP-optimized fuzzy measure method

DUANXintong1.2，QI Dongliang1，2，ZHANGRan1，2，WANGWangdal.2，CUI Xinyuel.2 （1.Department ofCivil Engineering，Hebei University of Water Resources and Electric Engineering， Cangzhou061ool，China；2.HebeiKeyLaboratoryof Geotechnical Engineering SafetyandDeformation Control， Cangzhou ， China）

Abstract：At present，commonly used open-pit mine slope stability analysis methods，such as the limit equilibrium method and the finite-element strength reduction method，relyonthesafety factoras the sole criterion，which presentscertain limitations.Thisstudyproposed theuseofa fuzzy measuremethod，which effectively handled fuzziness and uncertainty，toconduct slope stabilityanalysis foropen-pit mines.To address the dificulty of accurately determining fuzzy parameters in this method，a Genetic Algorithm （GA）-optimized BP neural network（GABP）model was designed to predict the fuzzy parameters.Theexperimental results showed that the mean relative errors of the GABP-predicted fuzzy parameters ξ and η were 3.66% and 3.25% ， respectively，both lower than thoseof the BP neural network.By substituting the fuzzy parameters predicted by the GABP model into the fuzzy measure method，the stabilityof the slope in the Gaocun Iron Mine was analyzed.The calculated slope failure probability was 0.155 4，indicating overallstability with local instability，which was highly consistent with field monitoring results.The finite-element strength reduction method and the Bishop method were further used to validate the accuracy of the GABP-optimized fuzzy measure method.The results showed that the three methods yielded consistent outcomes， whereas the GABP-optimized fuzzy measure method required lower computational cost and provided higher efficiency.It also accuratelycharacterized the progressive evolution of the slope from stability to failure， which better matched practical engineering conditions.

Key words： open-pit mine; slope stability analysis; fuzzy measure method; genetic algorithm-ptimized BP neural network

0引言

高陡节理化露天矿边坡失稳往往具有突发性和破坏性，不仅会造成巨大的经济损失，还会威胁人员生命安全。（剩余12055字）