Shield-Roof Interaction in Longwall Panels: Insights from Field Data and Their Application to Ground Control

Table 2

Stratigraphic sequence of study panels.

Strata	Thickness (m)
Cumberland-LW63
Limestone	4.5
Claystone	0.7
Coal	0.56
Claystone	0.65
Limestone	6.1
Gray clay shale	1.8
Pittsburgh first rider coal seam	0.39
Gray clay shale	0.3
Coal seam	1.88
Gray clay shale	1.37
Daliuta LW22304
Sandy mudstone	2.8
Coarse sandstone	29.6
Fine sandstone	3.7
Coarse sandstone	12.7
Mudstone	2.5
Coal (mined seam)	7
Middle-fine sandstone	18
Siltstone	7.8
Carbon mudstone	0.2
Coal seam	4.4
Fine sandstone	4.57
Yongcheng LW203
Loess	380
Sandy loam	3.86
Sandy mudstone	4.93
Aluminum mudstone	3.89
Mudstone	4.65
Mudstone	6.38
Sandy mudstone	3.21
Coal seam	2.8
Sandy mudstone	4.92