Table 10 The variation coefficient of the normal rock-breaking force in the cutting tests.
Type | NO. | lj/ mm | θ/ ° | lc / lq | \(CV\) | |
|---|---|---|---|---|---|---|
Normal rock-breaking force | Rolling rock-breaking force | |||||
Design of the orthogonal experimental scheme | 1 | 40 | 15 | 0.5 | 2.8105 | 2.9461 |
2 | 40 | 45 | 2 | 1.9061 | 22.4014 | |
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 | 2.7481 | 3.4356 | |
7 | 80 | 15 | 1 | 2.8904 | 4.5466 | |
8 | 80 | 45 | 0.5 | 2.2041 | 4.1703 | |
9 | 80 | 75 | 2 | 2.2108 | 2.9227 | |
Normal rock-breaking force | \({\overline {{CV}} _1}\) | 2.3879 | 2.7731 | 2.5876 | 22.1910 | / |
\({\overline {{CV}} _2}\) | 2.5740 | 2.1553 | 2.5643 | |||
\({\overline {{CV}} _3}\) | 2.4351 | 2.4686 | 2.2451 | |||
R | 0.1862 | 0.6178 | 0.3425 | / | / | |
Optimal level | 40 | 45 | 2 | / | / | |
Rolling rock-breaking force | \({\overline {{CV}} _1}\) | 9.3089 | 4.3484 | 3.5173 | / | 52.4703 |
\({\overline {{CV}} _2}\) | 4.3013 | 10.1625 | 3.6806 | |||
\({\overline {{CV}} _3}\) | 3.8799 | 2.9792 | 10.2922 | |||
R | 5.4290 | 7.1834 | 6.7749 | / | / | |
Optimal level | 80 | 75 | 0.5 | / | / | |
