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Geofluids
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2022
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Article
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Tab 2
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Research Article
Pressure Relief and Permeability Enhancement Mechanism of Short-Distance Floor Roadway in Deep Coal Roadway Strip
Table 2
Radius of plastic zone in the roadway under different principal stress coefficients.
Roadway name
Roadway shape
Equivalent radius
/m
Radius of plastic zone
/m
Floor roadway
Right-angular semicircular arch
2.24
4.55
3.52
2.96
Overlying coal roadway
Rectangular
2.47
5.01
3.88
3.26