Rock Mechanics Characteristics Test and Optimization of High-Efficiency Mining in Dajishan Tungsten Mine

Table 2

Parameters and results of the tensile strength test specimen.

Rock classification	Sample number	Diameter (mm)	Height (mm)	Tensile stress (MPa)	Tensile strength (MPa)
Surrounding rock	W-1	49.52	48.40	7.33	7.21
	W-2	49.54	51.89	9.01
	W-3	49.52	51.56	5.30
	W-4	49.54	48.36	—
Ore rock	K-1	48.60	45.40	3.89	4.08
	K-2	48.60	50.80	4.92
	K-3	48.94	45.80	4.67
	K-4	48.94	50.12	2.86