Rockburst in Sandstone Containing Elliptic Holes with Varying Axial Ratios

Table 3

Mass and percentage of different grain groups.

Grain group	S-1-1		S-1.25-1		S-1.67-1		S-2.5-2
	Mass (g)	Percentage (%)	Mass (g)	Percentage (%)	Mass (g)	Percentage (%)	Mass (g)	Percentage (%)
Micro grain	0.08	1.67	0.08	2.01	0.11	3.68	0.06	5.69
Fine grain	1.82	36.19	2.08	52.13	1.81	59.01	0.96	90.59
Medium grain	1.86	37.04	1.39	34.84	0.84	27.46	0.04	3.72
Coarse grain	1.26	25.1	0.44	11.02	0.31	9.85	0	0
Total	5.02	100	3.99	100	3.07	100	1.06	100