Table 3 The force of the hob breaking rock.

From: Design and performance evaluation of a novel cutter-ring material based on TBM rock-breaking mechanisms

Lithology

Numerical simulation results (kN)

Calculated results (kN)

Experimental results (kN)

Normal force

Rolling force

Normal force

Rolling force

Normal force

Rolling force

Sandstone

108.25

10.13

111.51

10.58

107.50

9.65

Mudstone

44.85

4.05

47.18

4.16

46.30

4.15