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选取岩石抗压强度、完整系数、结构面状态、地下水发育情况、洞轴线与软弱结构面的夹角作为地下储油库工程围岩稳定性的评价因素,并采用权重反分析的方法确定各指标的权重,建立了基于权重反分析方法和功效系数法的洞库围岩稳定性评价模型。最后,将建立的围岩分类模型应用于实际工程,通过与实际开挖结果对比表明,模型判别结果与实际开挖揭露围岩类别相吻合,证明了该方法用于地下储油洞库围岩分类的合理性和有效性,为地下储油洞库围岩稳定性判别提供了一种新思路。
The rock compressive strength, complete coefficient, structural surface state, groundwater development, the angle between the hole axis and the weak structural plane are selected as the evaluation factors of the surrounding rock stability of the underground storage depot, and the weight inverse analysis method is adopted to determine the indexes Weight, the stability evaluation model of surrounding rock of caverns has been established based on weight inverse analysis and efficiency coefficient method. Finally, the established classification model of surrounding rock is applied to the actual project. Comparing with the actual excavation results, it is shown that the model discriminant results are consistent with the actual surrounding rock types exposed by excavation, which proves that the method is applied to the surrounding rock of underground oil storage caverns The rationality and validity of classification provide a new idea for the stability of surrounding rock of underground storage caverns.