Research Article
Laboratory Studies of Electric Current Generated during Fracture of Coal and Rock in Rock Burst Coal Mine
Table 2
Stress parameters corresponding to drop in amplitude and current reversal in rock samples.
| | | Electric current drop point (prepeak) | Electric current reversal point (postpeak) | | Time (s) | (MPa) | (MPa) | Proportionality coefficient | Time (s) | (MPa) | Proportionality coefficient |
| | Rock sample number 1 | 112.7 | 50.7 | 55.6 | 91% | 125.0 | 52.2 | 94% | | Rock sample number 2 | 100.6 | 43.4 | 45.7 | 95% | 110.0 | 38.2 | 84% |
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