基于灰色系统最优归类模型的围岩稳定性综合评价

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。

Synthetic Evaluation of Rock Stability Based on the Best Optimal Theory Model of Grey System

The evaluation of country rock stability in underground engineering is the important basis for carrying out engineering design and formulating corresponding engineering measures. According to the geological data related to country rock, a table about country rock stability intensity is established. Based on the principle of grey correlation analysis and fuzzy model identification, using extended least square criteria to construct object functions, an optimal theory analysis model of grey system for the country rock stability is used to analyze five indices influencing the country rock stability: rock quality designation RQD, moisture compressive strength Rw, integrity coefficient Kv, structure surface strength coefficient Kf and groundwater seepage measurement W/L. Meanwhile, the dynamic weight calculation method is used with applying the comprehensive evaluation index concept to give full consideration of discrete variable of evaluation index. The rationality and effectiveness of the method proposed is demonstrated through the example of analysis on country rock stability evaluation.