Impact compression properties of artificial cemented sand material under active confining pressure

Abstract

In order to explore the mechanical properties of rock with deep in-situ stress under explosive impact, cemented sand material (artificial material) instead of rock was used to carry out impact dynamics test under the condition of confining pressure. The experimental results show that the stress-strain curve of cemented sand specimens tested by triaxial impact compression changes significantly compared with those tested by uniaxial impact compression. The dynamic failure mode of cemented sand specimens placed under confining pressure constraints is one of axial tensile failure, while the dynamic compressive growth factor, peak strain, dynamic elastic modulus, and specific energy absorption of cemented sand specimens all have the characteristics correlated with confining pressure. The research results in this study can be as an important basis for the mechanism analysis of rock breaking by blasting in deep rock mass.

Test and mechanism analysis for crack propagation by blasting in rock under the condition of unidirectional load

“…and energy was released in the forms of electromagnetic radiation, acoustic emission and kinetic energy [34,35]. Therefore the "energy" can be considered as a parameter appeared in the whole process of rock deformation and fragmentation [36,37].…”