Table 1 Mechanical parameters of coal and rock in two entries of 1509 working face.

From: Study on large deformation mechanism and surrounding rock control of entry in “three soft coal seam” of deep mine

Name

Lithologic characters

Compressive strength

Softening index

Tensile strength/MPa

Drying/MPa

Saturation/MPa

Roadway roof

Siltstone

10.57–22.37

16.7

11.86–12.93

12.4

0.72–0.77

0.74

1.24–4.90

3.52

Roadway rib

No.5 coal seam

5.5–7.39

6.45

5.20–5.73

5.56

0.81–0.89

0.86

0.18–0.25

0.21

Roadway floor

Mudstone

4.07–9.68

6.88

1.12–4.72

2.92

0.28–0.49

0.39

1.35–1.69

1.55

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