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Geofluids
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2019
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Article
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Tab 5
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Research Article
Evaluation on the Stability of Vertical Mine Shafts below Thick Loose Strata Based on the Comprehensive Weight Method and a Fuzzy Matter-Element Analysis Model
Table 5
Effect assignment of the shaft wall construction quality.
Shaft wall construction quality grade
Safe
Safer
Critically safe
Dangerous
Extremely dangerous
Assignment
0~2
2~4
4~6
6~8
8~10