Shape characteristics and deformation properties of granite crushed stone during compression

The shape of particles plays a significant role in determining the mechanical properties of granular materials. This study systematically investigated the effects of particle shape on the crushing behaviors of granite crushed stone using a 3D particle measurement system, image processing techniques, and lateral restraint compression tests. The results indicate that the particle shape parameters, such as sphericity and flat index, vary with particle size, and the stress-strain curves during compression follow an exponential function. Tetrahedral particles exhibited the highest deformation under identical stress conditions, while hexahedral particles demonstrated the lowest deformation. Field tests conducted in the - 1465 m belt roadway chamber of the Sha-ling Gold Mine validated the theoretical model. The field tests were crucial in verifying the reliability of the theoretical analysis.