Table 2 The comparison results.

From: Coal falling trajectory and strength analysis of drum of shearer based on a bidirectional coupling method

Force on spiral drum (N)

Experimental result

Error with DEM-MFBD (%)

Error with DEM (%)

Traction resistance direction

36,417.3229

1.17

7.78

Direction of lateral force

8717.6191

1.87

7.09

Cutting resistance direction

63,721.4196

2.46

8.11

Three-way resultant force

79,316.6572

2.12

9.97

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