A semi-theoretical method for determining the anisotropic permeability based on average permeability of rock masses

IF 2.8 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Environmental Earth Sciences Pub Date : 2024-08-12 DOI:10.1007/s12665-024-11779-9

Jingyong Wang, Xiaohong Wang, Qi Ge, Weijiang Chu, Ning Liu, Qing Lü

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Abstract

Determining the anisotropic permeability of rock masses plays an important role in various geoscience and engineering projects. Since hydraulic aperture is difficult to be measured directly, numerical or theoretical methods for calculating directional permeability are usually used for qualitative technical support, rather than quantitative analysis. A semi-theoretical method is proposed in this study to estimate the directional relationship based on average permeability, where the latter can be obtained through a relatively cheap single-borehole water pressure tests. In this method, hydraulic aperture is replaced by aperture ratio, which can be quickly determined through field investigation by experienced geologists. Compared to adopting multiple-borehole water pressure tests to determining the anisotropic permeability, the new developed method can significantly reduce the testing cost. Numerical experiments are conducted and validated our method, the results show that the mean error rates are generally below 20%.

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根据岩体平均渗透率确定各向异性渗透率的半理论方法

确定岩体的各向异性渗透率在各种地球科学和工程项目中发挥着重要作用。由于水力孔径难以直接测量，计算定向渗透率的数值或理论方法通常用于定性技术支持，而非定量分析。本研究提出了一种基于平均渗透率估算定向关系的半理论方法，后者可以通过相对便宜的单孔水压试验获得。在这种方法中，水力孔径被孔径比所取代，而孔径比可以由经验丰富的地质学家通过现场勘查快速确定。与采用多钻孔水压试验确定各向异性渗透率相比，新开发的方法可大大降低试验成本。我们进行了数值实验并验证了我们的方法，结果表明平均误差率一般低于 20%。

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来源期刊

Environmental Earth Sciences 环境科学-地球科学综合

CiteScore

5.10

自引率

3.60%

发文量

494

审稿时长

8.3 months

期刊介绍： Environmental Earth Sciences is an international multidisciplinary journal concerned with all aspects of interaction between humans, natural resources, ecosystems, special climates or unique geographic zones, and the earth: Water and soil contamination caused by waste management and disposal practices Environmental problems associated with transportation by land, air, or water Geological processes that may impact biosystems or humans Man-made or naturally occurring geological or hydrological hazards Environmental problems associated with the recovery of materials from the earth Environmental problems caused by extraction of minerals, coal, and ores, as well as oil and gas, water and alternative energy sources Environmental impacts of exploration and recultivation – Environmental impacts of hazardous materials Management of environmental data and information in data banks and information systems Dissemination of knowledge on techniques, methods, approaches and experiences to improve and remediate the environment In pursuit of these topics, the geoscientific disciplines are invited to contribute their knowledge and experience. Major disciplines include: hydrogeology, hydrochemistry, geochemistry, geophysics, engineering geology, remediation science, natural resources management, environmental climatology and biota, environmental geography, soil science and geomicrobiology.