There are many methods for determining the permeability coefficient of fractured rock bodies,and each method has its corresponding characteristics and applicable conditions,so the selection of an ap-propriate permeability coefficient is crucial for seepage analysis in water conservancy and hydropower pro-jects.Taking Zeya reservoir spillway project as an example,the permeability coefficient was calculated in three exploration holes by using water injection test,water compression test and connectivity test,respec-tively.The results show that the permeability coefficients calculated by different test methods differ greatly by 1-4 orders of magnitude,indicating that the fractured rock body has a strong non-homogeneous anisotro-py.Each method is suitable for calculating the permeability coefficient of fractured rock bodies,but for practical engineering,it is necessary to choose the appropriate test methods and permeability coefficient values according to the specific geological conditions and the size of the study scale to provide better guid-ance for specific projects.
关键词
裂隙岩体/渗透系数/注水试验/压水试验,连通试验
Key words
Fractured rock mass/Permeability coefficient/Water injection test/Water compression test/Connectivity test
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