Table 2 The truth values of the two-chamber group states.

From: Structural importance analysis and key chambers identification for chain instability of chamber group in coal mine

Topological structures (II ~ III)

No

Chamber states

 

Chamber group states φ(X)

No

Chamber states

 

Chamber group states φ(X)

 

x1

x2

  

x1

x2

 

1

0

0

0

1

0

0

0

2

0

1

1

2

0

1

0

3

1

0

1

3

1

0

0

4

1

1

1

4

1

1

1