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. 2024 Oct 22;14:24870. doi: 10.1038/s41598-024-75767-6

Table 7.

The variation coefficient of the rock-breaking force in the cutting tests.

Type NO. lj/ mm θ/ ° lc / lq Inline graphic
Normal rock-breaking force Rolling rock-breaking force
Design of the orthogonal experimental scheme 1 40 15 0.5 2.8107 2.9462
2 40 45 2 1.9061 22.4013
3 40 75 1 2.4470 2.5792
4 60 15 2 2.6184 5.5525
5 60 45 1 2.3556 3.9159
6 60 75 0.5 2.7480 3.4356
7 80 15 1 2.8904 4.5466
8 80 45 0.5 2.2041 4.1702
9 80 75 2 2.2108 2.9227
normal rock-breaking force Inline graphic 2.3879 2.7732 2.5876 22.1911 /
Inline graphic 2.5740 2.1553 2.5643
Inline graphic 2.4351 2.4686 2.2415
R 0.1861 0.6179 0.3425 / /
Optimal level 40 45 2 / /
rolling rock-breaking force Inline graphic 9.3089 4.3484 3.5173 / 52.4702
Inline graphic 4.3013 10.1625 3.6806
Inline graphic 3.8798 2.9792 10.2922
R 5.4291 7.1833 6.7748 / /
Optimal level 80 75 0.5 / /