Table 1 Columnar section of rock strata.

From: Excavation methods and stability control strategies for gob-side roadways based on spatiotemporal evolution

Lithology

Thickness/m

Columnar

Lithological description

Medium grained sandstone

9

grayish white, medium-thick bedded, massive, fissured, unbedded, semi-rigid.

Argillaceous limestone

8.2

Dark gray, medium-thick layered, massive, with cracks, containing siderite bands and nodules, semi-hard.

Muddy limestone

4

Gray black, medium-thick layered, massive with fissures containing siderite nodules, hard, containing plant debris fossils.

#5 coal

13.5

Black, block shaped, semi dark coal.

Sandy mudstone

2

Gray black, thin, soft texture.

Fine sandstone

5.2

Light gray, medium-thick layered, massive, with cracks, uniform bedding, semi-hard.

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