Research Article
Mechanical Mechanism of Water Injection to Enhance the Stability of Soft Coal
Table 2
Point-load strength of coal.
| Number | h (mm) | b (mm) | (N) | Is(50) (MPa) | Rc (MPa) | Rt (MPa) |
| B1 | 37.9 | 53.1 | 403 | 0.158 | 3.002 | 0.130 | B2 | 47.2 | 56.0 | 504 | 0.160 | 3.040 | 0.131 | B3 | 45.8 | 60.8 | 609 | 0.186 | 3.534 | 0.153 | B4 | 39.1 | 53.4 | 785 | 0.299 | 5.681 | 0.245 | B5 | 44.2 | 49.7 | 1090 | 0.400 | 7.600 | 0.328 | B6 | 48.7 | 50.6 | 688 | 0.231 | 4.389 | 0.189 | B7 | 40.9 | 68.2 | 512 | 0.156 | 2.964 | 0.128 | B8 | 47.6 | 57.0 | 453 | 0.141 | 2.679 | 0.116 | B9 | 50.7 | 62.8 | 421 | 0.116 | 2.204 | 0.095 | B10 | 38.2 | 47.9 | 411 | 0.174 | 3.306 | 0.143 | B11 | 43.0 | 58.0 | 541 | 0.18 | 3.420 | 0.148 | B12 | 39.6 | 62.2 | 646 | 0.217 | 4.123 | 0.178 | B13 | 44.4 | 47.4 | 497 | 0.188 | 3.572 | 0.154 | B14 | 49.0 | 55.3 | 452 | 0.141 | 2.679 | 0.116 | B15 | 46.6 | 59.9 | 887 | 0.270 | 5.130 | 0.221 | Average | | | | | 3.822 | 0.165 |
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