Research Article
Mechanical Mechanism of Water Injection to Enhance the Stability of Soft Coal
Table 5
Shape of liquid bridge and variation law of liquid bridge force with water content.
| State | Form of liquid bridge | f1 | f2 | f12 | F | Between small particles | Between large and small particles | Between big particles |
| I | Pendulum-shaped and cord-shaped | Pendulum-shaped and cord-shaped | Pendulum-shaped | ↑ | ↑ | ↑ | ↑ | II | Capillary-shaped | Capillary-shaped | Cord-shaped | ↑ | ↑ | ↑ | ↑ | III | Muddy | Muddy | Capillary-shaped | ↓ | ↓ | ↓ | ↑ | IV | Muddy | Muddy | Muddy | ↓ | ↓ | ↓ | ↓ |
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