Research Article

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

Table 5

Calculations of the energy density.

Specimen shapeSpecimen IDAt peak pointFED (mJ·mm−3)
IED (mJ·mm−3)EED (mJ·mm−3)DED (mJ·mm−3)

CylinderRS-CL-10.29320.22210.07110.0755
RS-CL-20.25560.19360.06200.0942
RS-CL-30.26050.19730.06320.0795
RS-CL-40.28290.21430.06860.0697
RS-CL-50.25060.18980.06080.0615
RS-CL-60.29040.22000.07040.0536

CuboidRS-CB-10.35620.26610.09010.0696
RS-CB-20.36800.27490.09310.0753
RS-CB-30.39130.29230.09900.0657
RS-CB-40.31390.23440.07950.0379
RS-CB-50.33310.24880.08430.0969
RS-CB-60.37070.27690.09380.0817
RS-CB-70.39510.29520.09990.0549