Research Article
Study on Monitoring Rock Burst through Drill Pipe Torque
Table 1
Loading and drilling conditions of the samples.
| Sample number | Loading pressure/kN | Coal stress/MPa | Coal strength/MPa | Drilling speed/m/min | Drilling time/s | Drilling depth/mm |
| 1 | 1500 | 6.0 | 15 | 0.22 | 120 | 440 | 2 | 2000 | 8.0 | 15 | 0.22 | 120 | 440 | 3 | 2500 | 10.0 | 15 | 0.22 | 120 | 440 | 4 | 3000 | 12.0 | 15 | 0.22 | 120 | 440 | 5 | 3500 | 14.0 | 15 | 0.22 | 120 | 440 | 6 | 2500 | 10.0 | 7 | 0.4 | 60 | 400 | 7 | 2500 | 10.0 | 10 | 0.4 | 60 | 400 | 8 | 2500 | 10.0 | 15 | 0.4 | 60 | 400 | 9 | 2500 | 10.0 | 19 | 0.4 | 60 | 400 | 10 | 2500 | 10.0 | 24 | 0.4 | 60 | 400 | 11 | 2500 | 10.0 | 15 | 0.15 | 192 | 480 | 12 | 2500 | 10.0 | 15 | 0.2 | 144 | 480 | 13 | 2500 | 10.0 | 15 | 0.3 | 96 | 480 |
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