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Geofluids
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2021
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Article
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Tab 2
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Research Article
Study on the Radial Displacement Law and Permeability Enhancement Effect of Coal Body around Hydraulic Flushing Drilling
Table 2
Physical-mechanical parameters of the coal body.
Category
Volumetric weight
Bulk modulus (GPa)
Shear modulus (GPa)
Tensile strength (MPa)
Adhesion (MPa)
Internal friction angle (°)
Coal seam
1400
0.47
0.23
0.58
0.40
16