Table 3 Energy values of coal-rock combination sample.

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

Sample

Ei/J×mm− 3

ET/J×mm− 3

EH/J×mm− 3

EF/J×mm− 3

η/%

RCR-1

0.1173

0.1015

0.0158

0.0672

66.21

RCR-2

0.0578

0.0433

0.0145

0.0508

117.32

RCR-3

0.0420

0.0282

0.0138

0.0192

68.09

RCR-4

0.0231

0.0169

0.0062

0.0289

171.01

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