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Mathematical Problems in Engineering
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2022
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Article
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Tab 1
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Research Article
Selection of Compatible Coal Seam for Methane Drainage Operation Based on Uncertain Geological Conditions: A Hybrid Fuzzy Approach
Table 1
Coefficients affecting the compressive strength of the roof rock.
Rock type
Sandstone
0.33
0.7
0.6
Limestone
0.42
0.6
0.4
Limestone and Claystone
0.5
0.6
0.4