Investigation of the relationship between rock brittleness and brittle fragmentation

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Abstract

Fragmentation characteristics can provide a good basis for identifying the brittleness level and failure mode in rock materials. Investigating the rock fragmentation is important in many rock mechanics applications such as evaluating the blasting efficiency, wear of cutting tools in mechanized excavation, mineral processing recovery, and rock bursting intensity. Fragments generated from rock failure and through each rock mechanics application are different in size and morphology. The purpose of this research is to find the relationship between fragmentation characteristics and brittleness under static compressive loading. Thus, the fragmentation features including size, mass and shape for Gosford sandstone and granite were analyzed. The fractal dimensions were calculated through the mass-size statistical distribution and then compared with the brittleness levels obtained from various methods. It was found that the rock types with different brittleness values possess different fragmentation properties. The highest quantity of fragments generated from granite owing to its higher level of brittleness. An inverse relationship was found between the fractal dimension and brittleness index that can be used as an effective approach in understanding of rock failure mechanisms.

Original languageEnglish
Title of host publication56th U.S. Rock Mechanics/Geomechanics Symposium
PublisherAmerican Rock Mechanics Association (ARMA)
ISBN (Electronic)9780979497575
Publication statusPublished - 2022
EventUS Rock Mechanics / Geomechanics Symposium 2022 - Santa Fe, United States of America
Duration: 26 Jun 202229 Jun 2022
Conference number: 56th
https://www.itascacg.com/events/arma-56th-us-rock-mechanics-geomechanics-symposium (Website)

Publication series

Name56th U.S. Rock Mechanics/Geomechanics Symposium

Conference

ConferenceUS Rock Mechanics / Geomechanics Symposium 2022
Country/TerritoryUnited States of America
CitySanta Fe
Period26/06/2229/06/22
Internet address

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