Numerical Simulation of Fragment Separation during Rock Cutting Using a 3D Dynamic Finite Element Analysis Code

Table 7

Regression results to predict cutter performance.

Variables	Cutting parameter	Regression equation	Correlation coefficient	-value	value
SE-UCS	Cutting depth of 3 mm		0.91699	26.45539
SE-UCS	Cutting depth of 6 mm		0.94529	48.25786
SE-UCS	Cutting depth of 9 mm		0.96059	73.54087
SE-UCS	Cutting depth of 12 mm		0.97069	37.45178
SE-CD	Sandstone-1		0.98492	3861.400	0.01
SE-CD	Sandstone-2		0.97680	2175.379	0.02
SE-CD	Sandstone-3		0.99714	20362.05	0.005
SE-CD	Limestone		0.94301	830.8230	0.02

SE: specific energy, UCS: uniaxial compressive strength, and CD: cutting depth.