Experimental study on the fragment characteristics of marble spheres under repeated impacts

Abstract

Impact-induced fragmentation of rock blocks is a frequent phenomenon during rockfall hazards, which significantly increases the safety risk to local community and infrastructure. This paper aims to thoroughly investigate the fragment characteristics of rockfall caused by multiple impacts, including the degree of fragmentation and the fragment size distribution. Forty-seven sets of repeated impact tests were conducted using a new impact device. Marble spheres of different sizes repeatedly collided with three types of target plates under various velocities. The mass of each fragment was measured separately after the sphere was broken. It was determined that the fracture patterns of the marble ..