Table 6 Firmness coefficient and adsorption–desorption index of similar materials.

From: Experimental study on the ratio model of similar materials in the simulation test of coal and gas outburst

Experiment No

Material ratio

Parameter

Material ratio

Parameter

Pulverized coal ratio

Firmness coefficient (f)

Pulverized coal ratio

Adsorption constant

Initial velocity of diffusion (ΔP)

a

b

1

0.2

0.13

0.4

25.6248

 

1.7734

2

0.4

0.17

0.4

27.4399

 

1.7205

3

0.6

0.19

0.4

28.6718

 

1.6884

4

0.8

0.23

0.4

30.5426

 

1.3084

5

–

–

0.4

31.5511

 

1.3356

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