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Advances in Civil Engineering
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2021
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Article
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Tab 1
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Research Article
Determining the Layout Parameters of the Gas Drainage Roadway: A Study for Sima Coalmine China
Table 1
Calculation results.
Key strata
First inferior key stratum
1107.87
12.24
Second inferior key stratum
1074.59
24.56
Main key stratum
1068.84
32.30