Table 2 Data set sample parameter statistics.
From: Comparison of machine learning models for rock UCS prediction using measurement while drilling data
Drilling parameter | Drilling speed (mm/s) | Rotational speed (r/s) | Thrust (kN) | Torque (kN·mm) | UCS (MPa) |
|---|---|---|---|---|---|
Max | 40.70 | 13.33 | 39 | 444 | 227.52 |
Min | 0.33 | 0.83 | 0.01 | 0.14 | 1.90 |
Mean | 4.27 | 5.85 | 6.57 | 63.26 | 63.28 |
Median | 1.40 | 5.13 | 2.15 | 19.79 | 30.12 |
Variance | 65.87 | 16.43 | 97.45 | 8661.80 | 5304.27 |
Standard deviation | 8.12 | 4.05 | 9.87 | 93.07 | 72.83 |
