Open AccessMODELLING THE DEVELOPMENT OF AXIALLY SYMMETRIC CRACKS IN THE EXPLOSION OF A BLAST-HOLE CHARGE
Author(s) -
Eran Sher
Publication year - 2019
Publication title -
interèkspo geo-sibirʹ
Language(s) - English
Resource type - Journals
ISSN - 2618-981X
DOI - 10.33764/2618-981x-2019-2-5-112-119
Subject(s) - axial symmetry , brittleness , charge (physics) , ultimate tensile strength , materials science , geology , mechanics , structural engineering , composite material , physics , engineering , quantum mechanics
During explosion of buried blast-hole charges at brittle rock solid, main destruction of rock occurs by means of development of radial cracks specified by significant tensile tangential stresses near charge and along its surface. While explosion happens, near end faces of buried charges along its axis significant tensile stresses occur. Presence of such stresses can cause occurring and development of axially symmetric cracks. In the work calculating scheme of axially symmetric cracks development near end face of charge near free surface is developed. Examples of calculations of the shape and size of such cracksare carried out.