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 number61605958

Initial setting time21 : 2721 : 2821 : 2921 : 32
Initial setting pressure (MPa)17.4513.253.617.7
Pressure after ten minutes (MPa)26.524.8519.2527.8
Leg pressure increment (MPa)9.0511.615.6510.1