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《Chinese Journal of Underground Space and Engineering》 2013-03
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Synthetic Evaluation of Rock Stability Based on the Best Optimal Theory Model of Grey System

Lei Jinsheng,Liu Qiong,Bao Lei,Cao Xueting(College of Civil Engineering & Architecture,China Three Gorges University,Yichang,Hubei 443002,China)  
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.
【Fund】: 国家自然科学基金资助项目(50909053)
【CateGory Index】: TU457
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