Table 1 UCS and elastic modulus of samples.

From: The study of mechanical properties and fracture evolution of coal-rock masses under hard roof-soft floor conditions

Samples

UCS/M Pa

E/G Pa

Single standard sandstone sample

71.69

5.906

Single standard coal sample

13.62

1.346

Single standard red sandstone sample

39.57

4.480

Single standard mudstone sample

7.03

0.621

Single standard sandy mudstone sample

4.95

0.401

Single standardized siltstone sample

2.92

0.424

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