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

Table 6

Ejection characteristic information of specimens.

Specimen shape	Specimen ID	Failure mode	Burst sound	Fragments ejection velocity	Fragments ejection quantity
Cylinder	RS-CL-1	Tensile	Slight	Slow	Minor
	RS-CL-2	Tensile	Slight	—	—
	RS-CL-3	Tensile and shear	Slight	Slow	Minor
	RS-CL-4	Tensile and shear	Slight	Slow	Modest
	RS-CL-5	Tensile	Slight	Slow	Minor
	RS-CL-6	Tensile and shear	Slight	Slow	Modest
Cuboid	RS-CB-1	Shear	Loud	Fast	Great
	RS-CB-2	Shear	Loud	Medium	Modest
	RS-CB-3	Shear	Loud	Fast	Great
	RS-CB-4	Tensile	Moderate	Slow	Modest
	RS-CB-5	Shear and tensile	Moderate	Medium	Modest
	RS-CB-6	Tensile	Moderate	Medium	Modest
	RS-CB-7	Shear	Loud	Fast	Great