Research Article
Mechanical Model of the Initial Leg Pressure Increment of the Shield and Its Application to Monitor Roof Load in Longwall Panels
Table 3
Typical difference in leg pressure increment in the same period.
| Shield number | 61 | 60 | 59 | 58 |
| Initial setting time | 2 : 48 | 2 : 52 | 2 : 52 | 2 : 56 | Initial setting pressure (MPa) | 13.45 | 26.3 | 26.05 | 27.55 | Pressure after ten minutes (MPa) | 21.65 | 26.25 | 25.8 | 27.55 | Leg pressure increment (MPa) | 8.25 | −0.05 | −0.25 | 0 |
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