THEORETICAL STUDY OF HARD ROCK FRACTURING BY CONTROLLED IMPACT LOADING

Abstract

The main purpose of the work is to address a technological problem of
separating the stone blocks from a massif by controlling the effect of destructive
forces, realized through an even distribution of loads and stresses inside the massif
by means of a specially designed wedge-shaped tool, determining the shape and
dimensional parameters of the destructive tool, as well as the frequency and speed
of load application. This study is destined to solve problems, that ultimately enables
designing of a machinery for rock destruction, viz: a) a quantitative assessment of
the effects of properties of destructed medium on indicators of the impact energy
transfer process, determining of optimal parameters of the working bodies of impact
machines, as well as establishing the area of rational application; b) evaluating the
repeatability of the effects of time and dynamics on the effectiveness of the crushing
impact; c) optimizing of parameters of the process of rock destruction and structural
characteristics of machines on the basis of the theory of impact destruction. This will
form the basis for designing of highly effective, reliable and ef�icient machines as well
as of those able to work effectively with rocks of different strengths