NUMERICAL ANALYSIS OF DYNAMIC FRACTURING OF THE ROCK BY THE EXPLOSION / ANÁLISE NUMÉRICA DO FRATURAMENTO DINÂMICO DE ROCHAS POR EXPLOSÃO

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

Rock blasting are usually carried out by drilling slender holes into a rock mass and detonating explosive charges in their interiors. The detonation produces a fast increase in the temperature surrounding the holes and a huge gas expansion that will apply high pressures on the walls. Crushing and fracturing of the rock will occur as a consequence of the shock waves generated by this dynamic loading. Blasting engineer should know the strength and deformation characteristics of rocks under dynamic loading in order to better understand and estimate the effects caused by the explosion. Rock blasting is a very complicate problem whose simulation, to avoid insurmountable mathematical difficulties, needs to be developed under some simplifying assumptions such as isotropy, linear elasticity and brittle behavior of the material. In this work a computational program based on the finite element method was developed for dynamic analyses of rock blasting. The fracturing is considered to be primarily caused by the stresses induced by P and SV waves. The effects of the gas pressure inside the fractures were neglected at the time being.

ASSUNTO(S)

dynamic fracturing numerical analysis analise numerica fraturamento dinamico

ACESSO AO ARTIGO

Documentos Relacionados