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地下工程围岩稳定性评价是进行工程设计和制定相应工程措施的重要依据。根据与围岩稳定有关的地质资料建立了围岩稳定性分级表,在灰色关联分析和模糊识别原理的基础上,运用最小二乘法构造目标函数,对影响围岩稳定性的5项指标:岩石质量指标RQD,湿抗压强度Rw,完整性系数Kv,结构面强度系数Kf,地下水渗水量W/L等进行了关联分析,建立了围岩稳定评价灰色最优归类数学模型。模型运用了动态权重计算方法和综合评判指数的概念,以充分考虑评价标准指标的离散性。算例分析表明了文中方法对围岩稳定性评估的合理性和有效性。
The stability evaluation of underground engineering surrounding rock is an important basis for engineering design and engineering measures. Based on the geological data related to the stability of the surrounding rock, a classification table of surrounding rock stability is established. Based on the gray relational analysis and the principle of fuzzy recognition, the least square method is used to construct the objective function. The five indexes that affect the stability of the surrounding rock are rock Quality index RQD, wet compressive strength Rw, integrity coefficient Kv, structural surface strength coefficient Kf, groundwater W / L and so on, and established the gray optimal classification mathematical model of surrounding rock stability evaluation. The model uses the concept of dynamic weight calculation method and comprehensive evaluation index to take full account of the discreteness of evaluation criteria indicators. The case study shows that the proposed method is reasonable and effective in evaluating the stability of surrounding rock.