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裂隙岩体的渗透特性受控于裂隙的发育特征、连通特性和充填情况,并与岩体的地应力水平具有显著的相关性。基于裂隙岩体渗透性的影响因素,并考虑现有渗透系数估算模型的不足,利用钻孔压水试验和钻孔电视图像资料,建立考虑埋深(Z)、岩石质量指标(RQD)以及充填物指标(FSD)等3个指标的渗透系数估算ZRF模型,并应用到牙根二级水电站及其他工程区的渗透系数估算中。结果表明,与已有的渗透系数估算模型相比,ZRF模型较好地反映了岩体渗透性的影响因素,且模型参数物理意义明确,便于获取,对分析裂隙岩体渗透性具有一定的工程参考价值。
The permeability characteristics of fractured rock mass are controlled by the developmental characteristics, connectivity and filling of fractures, and have significant correlation with the stress level of the rock mass. Based on the influencing factors of permeability of fractured rock mass and taking into account the shortcomings of the existing permeability coefficient estimation model, based on borehole water pressure test and borehole TV image data, the authors consider the effects of buried depth (Z), rock quality index (RQD) (FSD) and other three indicators of the permeability coefficient estimation ZRF model, and applied to the second stage hydropower station and other projects in the permeability coefficient estimation. The results show that, compared with the existing permeability coefficient estimation model, the ZRF model can well reflect the influencing factors of permeability of rock mass, and the physical meaning of the model parameters is clear and easy to obtain. Therefore, it has a certain project to analyze the permeability of fractured rock mass Reference value.