基于模糊-理想点法的海下采场顶板稳定性分析

Analysis of Stability of Undersea Stope Roof Based on Fuzzy-ideal Point Method

为准确评价复杂地质条件下海下采场顶板的稳定性,提出将模糊数学中的隶属度与理想点法相结合的模型。针对海下采场的特殊地质条件,综合考虑水文地质因素、工程地质因素、采场结构因素以及其他因素4个方面,选取9个评价指标。通过对指标进行隶属度化处理,由变异系数法确定指标权重,建立顶板分级模型。最后,根据三山岛金矿5个采场现场调查以及室内试验获得的指标数据,应用该模型对顶板稳定级别进行评判。结果表明,该模型的评判等级结果与工程实际相符,从而验证模型可用于海下采场顶板的稳定性分析。

For the sake of accurately evaluating the stability of undersea mining stope roof under compli-cated hydrogeological condition, a model was proposed based on membership of fuzzy set theory and the ideal point method. Bearing the special geology of undersea mining site and thinking over four aspects including hydrogeology, engineering geology, stope structure and other factors, nine evaluation indices were selected. The evaluation indices were converted to membership and the weight values of the evalua- tion indices were determined by the coefficient of variation, the model for roof grading was built. Finally, according to the index data collected from five stopes of Sanshandao gold mine and indoor test, the model was used for evaluationg stope roof grade. The results show that the model judgment of stability level is in good agreement with the engineering practice.