Research on Surface Failure Law of Working Faces in Large Mining Height and Shallow Buried Coal Seam

Table 1

Partial table of strata parameters.

Horizon	Lithology	Thickness (m)	Depth (m)
Roof	Fine sandstone	31	175.62
	Siltstone	0.6	176.22
	Medium sandstone	0.7	176.92
	Siltstone	2.41	179.33
Coal	Coal seam 5–2#	7.69	187.02
Floor	Siltstone	3.58	190.60
	Sandy mudstone	2.82	193.42
	Siltstone	4.4	197.82