Research Article
Parametric Study of the Borehole Drilling in Jointed Rock Mass
Table 1
The mechanical parameters of the coal rock mass.
| Parameter | Poisson’s ratio | Frictional angle | Cohesion | Elasticity modulus | Tensile strength |
| Value | 0.25 | 50° | 2 MPa | 10 GPa | 0.3 MPa |
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