Energy Distribution Law of Dynamic Failure of Coal-Rock Combined Body

Table 5

Rock layer parameters of coal seam roof and floor.

Strata number	Lithology	Distance from coal seam floor/m	Thickness/m
3	Gritstone	82.24	20
2	Conglomerate	62.24	50
1	Fine sandstone	12.24	8.82
0	Coal	3.42	3.42
1	Fine sandstone	0	30
2	Arenaceous mudstone	6	6
3	Medium sandstone	21	15