Experimental Study on the Influence of Specimen Shape on Rockburst Proneness of Red Sandstone

Table 8

Calculations of the far-field ejection mass ratio of specimens.

Specimen shape	Specimen ID	M F	Rockburst proneness	Average of MF
Cylinder	RS-CL-1	0.47	Moderate	0.30
	RS-CL-2	0.04	Light
	RS-CL-3	0.15	Light
	RS-CL-4	0.43	Moderate
	RS-CL-5	0.14	Light
	RS-CL-6	0.59	Moderate
Cuboid	RS-CB-1	0.76	Strong	0.64
	RS-CB-2	0.48	Moderate
	RS-CB-3	0.71	Strong
	RS-CB-4	0.58	Moderate
	RS-CB-5	0.55	Moderate
	RS-CB-6	0.54	Moderate
	RS-CB-7	0.86	Strong