Mechanical Model of the Initial Leg Pressure Increment of the Shield and Its Application to Monitor Roof Load in Longwall Panels
Table 1
Position relation of coal seams.
Lithology
Stratum thickness (m)
Depth (m)
Hydrological condition
Conglomerate
39.50
225.85
The water-abundance is moderate, the unit water inrush q varies from 1.06 (L/s.m) to 6.90 (L/s.m), and the permeability coefficient K varies from 1.26 (m/d) to 8.33 (m/d).
Siltstone
10.85
236.70
Mudstone
4.60
236.70
16–2 coal seam
1.50
238.20
Mudstone
3.40
241.60
Siltstone
8.95
250.55
The water-abundance is high, the unit water inrush q varies from 0.15 (L/s.m) to 1.38 (L/s.m), and the permeability coefficient K varies from 0.28 (m/d) to 1.71 (m/d).
