Optimal Proportion of Similar Materials and Rockburst Tendency of White Sandstone

Table 4

Test results of orthogonal ratio covered by the study.

Group number	Compressive strength (σc/MPa)	Tensile strength (σt/MPa)	Elastic modulus (E/GPa)	Ratio of compressive to tensile strength (σc/σt)
L1	14.14	2.73	2.03	5.18
L2	13.00	2.76	1.81	4.71
L3	13.50	2.47	1.57	5.46
L4	9.94	2.09	2.86	4.76
L5	13.59	2.85	2.16	4.77
L6	8.83	2.33	2.23	3.79
L7	12.15	2.44	1.65	4.98
L8	11.50	2.37	1.74	4.85
L9	12.47	2.23	2.07	5.59
L10	12.88	2.48	1.72	5.19
L11	10.93	2.62	1.96	4.17
L12	9.30	2.12	1.53	4.39
L13	13.29	2.24	1.82	5.93
L14	9.94	2.82	1.84	3.52
L15	9.79	2.16	1.76	4.53
L16	8.96	2.01	1.96	4.46