Investigating the Influences of Indentation Hardness and Brittleness of Rock-Like Material on Its Mechanical Crushing Behaviors

Table 6

The mean and standard deviation values of crushing force data.

Crushing force (kN)		Crushing forces of A		Crushing forces of B		Crushing forces of C		Crushing forces of D
Force direction		X-direction	Y-direction	X-direction	Y-direction	X-direction	Y-direction	X-direction	Y-direction
Unconfined stress conditions	Mean	159.05	92.96	123.01	72.03	161.20	93.04	116.68	68.20
	Standard deviation	81.52	48.60	88.45	51.24	86.68	50.18	81.83	48.00
5 MPa confining stress conditions	Mean	154.43	92.12	89.37	51.67	152.98	88.56	122.44	72.73
	Standard deviation	89.58	56.27	76.53	46.99	95.08	55.59	73.08	44.72