Research Article
Failure Mechanism of a Coal-Rock Combined Body with Inclinations of Structural Planes and a Calculation Model for Impact Energy
Table 1
Mechanical properties of coal and rock.
| Material | Uniaxial compressive strength (MPa) | Shear strength (103 MPa) | Dynamic failure time (ms) | Elastic energy index | Impact energy index | Elastic modulus (103 MPa) | Poisson’s ratio |
| Coal | 24.97 | 7.97 | 34 | 7.75 | 8.91 | 6.72 | 0.31 | Rock | 46.91 | 16.56 | 152 | 14.14 | 11.42 | 12.34 | 0.29 |
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