Table 11 Indicator weights derived from the game theory.

From: Optimization of residual coalbed methane extraction wells and analysis of development and emission reduction benefits in the Songzao mining area

Primary indicator

Secondary indicator

Weight coefficient

Mining condition B1

Geological structure complexity C1

0.054

Average buried depth C2

0.0356

Coal seam dip angle C3

0.038

Spontaneous combustion tendency C4

0.0778

Goaf area C5

0.0525

CBM resources B2

CBM emission C6

0.0635

Coal seam thickness C7

0.081

Maximum CBM content C8

0.0484

Water accumulation in the goaf C9

0.1172

Water-free space in the goaf C10

0.1602

Residual coal resources C11

0.0501

Economic conditions B3

Construction cost C12

0.0822

Estimated output value C13

0.1399

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