Research Article
Mechanical Mechanism of Water Injection to Enhance the Stability of Soft Coal
Table 4
Coal shear strength index under different water contents.
| Number | | (kPa) | S (kPa) | c (kPa) | φ (°) |
| D11 | 0.966 | 50 | 17.988 | 1.89 | 14.34 | D12 | 100 | 29.98 | D14 | 150 | 43.471 | D14 | 200 | 107.928 |
| D21 | 3.841 | 50 | 19.487 | 3.1935 | 14.72 | D22 | 100 | 26.982 | D24 | 150 | 53.964 | D24 | 200 | 109.427 |
| D31 | 7.688 | 50 | 14.99 | 5.0184 | 13.45 | D32 | 100 | 28.481 | D34 | 150 | 56.962 | D34 | 200 | 98.934 |
| D41 | 12.957 | 50 | 14.99 | 10.037 | 13.4 | D42 | 100 | 34.477 | D44 | 150 | 68.954 | D44 | 200 | 100.433 |
| D51 | 17.888 | 50 | 20.986 | 17.206 | 13.06 | D52 | 100 | 50.966 | D54 | 150 | 61.459 | D54 | 200 | 109.427 |
| D61 | 20.847 | 50 | 23.984 | 21.182 | 13.11 | D62 | 100 | 53.964 | D64 | 150 | 68.954 | D64 | 200 | 112.425 |
| D71 | 22.072 | 50 | 22.485 | 19.943 | 12.59 | D72 | 100 | 55.463 | D73 | 150 | 59.96 | D74 | 200 | 109.427 |
| D81 | 24.526 | 50 | 14.99 | 11.145 | 12.54 | D82 | 100 | 38.974 | D83 | 150 | 59.96 | D84 | 200 | 97.435 |
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