Calculated scheme of rock lump splitting off under the impact of wedge beneath a bench

Experimental and analytical study on key factors of rock breaking under a single indenter

“…The shear‐failure model considers that the shear failure is the reason resulting in rock breaking and the force causing rock shear failure is not directly given by the indenter, but by the bearing core, which was first proposed by Paul and developed by Dutta, 2,3 while the tensile‐failure model believes that the tensile failure is the main reason, which was first proposed by Swain and Lawn 4 and approved by Evans 5 and Yu 6 . Based on the two theoretical models, later scholars used the analysis method of elasticity to present the indentation stress fields of 1‐ and 2‐point loads applied on an ideal elastic half‐space 7 and improve the models according to different rock mass conditions, such as brittle rocks 8 and layered rock mass 9,10 …”

“…6 Based on the two theoretical models, later scholars used the analysis method of elasticity to present the indentation stress fields of 1-and 2-point loads applied on an ideal elastic half-space 7 and improve the models according to different rock mass conditions, such as brittle rocks 8 and layered rock mass. 9,10 The experimental researches on rock breaking under indenter impact mainly are laboratory experiments focusing on the loading methods, the evaluation indexes of rock-breaking effect, and rock properties, indenter shapes. Common loading methods include drop hammer 11 and the system of split Hopkinson pressure bar (SHPB).…”