Granitic rock from the western part of the Canadian Shield is considered as a potential host rock for the siting of a deep geological repository for the storage of heat-emitting high-level nuclear fuel waste. The research program focused on the use of surface permeability measurements conducted at 54 locations on a 300 mm cuboid of granite, obtained from the Lac du Bonnet region in Manitoba, to obtain an estimate for the effective permeability of the cuboid. Companion experiments are conducted on a 280 mm cuboid of granite obtained from Stanstead, Quebec, located in the eastern part of the Canadian Shield. The surface permeabilities for the cuboids of granite are developed from theoretical relationships applicable to experimental situations where steady flow is initiated at a sealed annular surface region with a pressurized central domain. The experimental values for the surface permeability are used with a kriging procedure to estimate the permeability variations within the cuboidal region. The spatial variations of permeability are implemented in computational models of the cuboidal regions to determine the one-dimensional permeabilities in three orthogonal directions. The effective permeability of the granite cuboids is estimated by appeal to the geometric mean. The research provides a non-destructive methodology for estimating the effective permeability of large specimens of rock and the experiments performed give estimates for the effective permeability of the two types of granitic rock obtained from the western and eastern flanks of the Canadian Shield.

中文翻译：

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从加拿大盾构的东西侧面获得的完整花岗岩有效渗透率的估算值

来自加拿大盾构西部的花岗石被认为是潜在的寄主岩石，可用于深层地质处置库的选址，以储存发热量高的核燃料废料。该研究计划的重点是在300毫米长方体花岗岩（从曼尼托巴省的Lac du Bonnet地区获得）的54个位置进行表面渗透率测量，以估算长方体的有效渗透率。对来自加拿大魁北克省Stanstead的280毫米长方体花岗岩进行同伴实验，该花岗岩位于加拿大盾构的东部。花岗岩长方体的表面渗透性是从适用于实验情况的理论关系发展而来的，在这种情况下，在具有加压中心区域的密封环形表面区域开始稳定流动。表面渗透率的实验值与克里金法一起用于估算长方体区域内的渗透率变化。在长方体区域的计算模型中实现磁导率的空间变化，以确定在三个正交方向上的一维磁导率。花岗岩长方体的有效渗透率是通过诉诸几何平均值来估算的。该研究提供了一种用于估计大块岩石有效渗透率的非破坏性方法，所进行的实验给出了从加拿大盾构西部和东部两侧获得的两种类型花岗岩的有效渗透率的估算值。