Coal Burst Induced by Horizontal Section Mining of a Steeply Inclined, Extra-Thick Coal Seam and Its Prevention: A Case Study from Yaojie No. 3 Coal Mine, China

Table 1

Basic conditions of coal and rock strata in the No. 5 mining area.

Lithology	Thickness (m)	Remarks
Oil shale	43.88	Primary key stratum
Interbedded oil shale and sandstone	14.77
Oil shale	3.33
Aluminium mudstone	9.82	Subkey stratum 2
Carbon mudstone	1.77
Oil shale	6.68	Subkey stratum 1/main roof
Fine sandstone	2.23	Immediate roof
No. 2 coal	58.89	Primary mineable coal seam
Coarse sandstone	3.41	Immediate floor
Glutenite	45.73	Main floor