Table 3 Comparison of results from different research methods.

From: Research on the failure law and actual measurement of floor in extremely close distance thick coal seam mining

Method

Failure depth

Relative error

Lag distance (m)

Relative error

Field measurement

16.10 m

 

16.00 m

 

Theoretical calculation

14.37 m

− 10.74%

11.63 m

− 27.31%

Numerical simulation

17.70 m

+ 9.94%

10.50 m

− 0.34.375%

Average

16.06 m

 

12.71 m

 
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