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中文摘要：
基于功效系数法的基本原理,在综合考虑青岛地铁实际地质情况的基础上,选取岩石抗压强度、完整系数、软化系数、结构面性态、地下水作为围岩稳定性的评价因素,并采用粗糙集理论确定各指标权重,建立了基于粗集功效系数法的地铁围岩稳定性评价模型。研究表明,稳定性分析结果与实际开挖情况相吻合,运用粗集功效系数法对青岛地铁进行围岩稳定性分析是可行的,为围岩稳定性分析提供一种新思路。
英文摘要：
Based on the basic principle of the efficacy coefficient method,a model of surrounding rock stability prediction was established.Considering the key affecting factors of surrounding rock stability,five factors were selected as evaluation indexes including rock press strength,integrated coefficient,soft coefficient,character of discontinuity and ground water.Rough set was adopted to determine the weighting coefficient of each evaluation index.Finally,the model was applied to the surrounding rock stability prediction of Qingdao metro and the results shows that the method was reliable,and it provides a new idea to predict surrounding rock stability.
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