Table 3 No.9 coal seam roof lithology classification and parameters.

From: Study on failure mechanism and energy dissipation law of single fissured coal in different tectonic stress areas

Rock classification

Elastic modulus /GPa

Poisson ratio

Mudstone

11.04

0.24

Sandy mudstone

19.33

0.22

Siltstone and other lithology

24.20

0.25

Fault throw

0 ~ 100 m

15.0

0.34

 > 100 m

7.0

0.35

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