Rock Directed Breaking Under the Impulse Load

World Multidisciplinary Earth Sciences Symposium 2016

Khomeriki, Sergo^1 ; Mataradze, Edgar^1 ; Chikhradze, Nikoloz^1,2 ; Losaberidze, Marine^1,2 ; Khomeriki, Davit^1 ; Shatberashvili, Grigol^1,2

Grigol Tsulukidze Mining Institute, 7, Mindeli St., Tbilisi

0186, Georgia^1

Georgian Technical University, Tbilisi

0175, Georgia^2

关键词: Conservation law;    Decorative stones;    Explosion energy;    Explosion process;    Rock physical;    Stress tensors;    Stressed-deformed state;    Vector components;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/44/5/052005/pdf
DOI  :  10.1088/1755-1315/44/5/052005

来源: IOP

【 摘 要 】

In the work the problem of directed chipping of facing stone material by means of managing of explosion process is considered. The technology of the mining of decorative stone by the use of explosion energy means the very rapid transfer of potential energy of elastic deformations to kinetic energy. As a result, the explosion impulse, in the expanse of the inertia of rock massive, does not cause the increase of existing cracks. In the course of explosion, the shock wave is propagated by ultrasonic velocity and in this case the medium parameters (pressure, density, temperature, velocity) increase in spurts. In spite of this fact the all three conservation laws of mechanics remain valid on basis of three laws the equations are derived by which the parameters of shock wave may be defined by means of the rock physical-mechanical properties. The load on the body volume at breaking under explosion acts over very small period of the time. Therefore, stressed-deformed state of the rock was studied when the impulse load acts on the boundary. It was considered that the mining of the blocks of facing stone is performed from the hard rocks. This means that the breaking proceeds in the zone of elastic deformation. In the conditions of mentioned assumptions, the expression of the stress tensor and displacement of vector components initiated by stressed-deformed state in the rock are written.