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Geofluids
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2020
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Article
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Tab 6
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Research Article
Rock Mass Classification for Columnar Jointed Basalt: A Case Study of Baihetan Hydropower Station
Table 6
Division standard of rock mass permeability.
Permeability
Good
Relative good
Moderate good
Relatively bad
Bad
Lugeon
<1.5
1.5~3.7
3.7~8.1
8.1~12
>12