Research Article
Mechanical Model of the Initial Leg Pressure Increment of the Shield and Its Application to Monitor Roof Load in Longwall Panels
Table 2
Typical difference in leg pressure increment in the same period.
| Shield number | 61 | 60 | 59 | 58 |
| Initial setting time | 21 : 27 | 21 : 28 | 21 : 29 | 21 : 32 | Initial setting pressure (MPa) | 17.45 | 13.25 | 3.6 | 17.7 | Pressure after ten minutes (MPa) | 26.5 | 24.85 | 19.25 | 27.8 | Leg pressure increment (MPa) | 9.05 | 11.6 | 15.65 | 10.1 |
|
|