THE DISTRIBUTION OF ENERGY IN MECHANICAL PROCESSES OF FRACTURED DESTRUCTION OF ROCKS BY EXPLOSION

Author(s):  V. N. Tyupin, Dr., Prof., Belgorod State National Research University, Belgorod, Russia, tyupinvn@mail.ru

T.I. Rubashkina, candidate of Sciences, associate Professor, Belgorod State National Research University, Belgorod, Russia

Issue:  Volume 51, № 1

Rubric:  Physics. Mathematical modeling

Annotation:  The experience of mining enterprises shows that the specific consumption of explosives in underground mining is 2-4 times higher than the consumption of open mining. To establish the reasons for this difference, mathematical modeling of the process of destruction and release of a fractured array by an explosion was carried out, and an equation by distribution of the explosion energy costs for mechanical forms of work (elastic-plastic deformations, emission and friction) during blasting the fractured array by a group of explosive charges on an open surface was compiled. By theoretical studies and numerical calculations, it has been established that more than 50% of the explosion energy is expended on overcoming the friction forces when the rock array is moved. The reliability of the obtained dependences is confirmed by numerical calculations and a comparison of the theoretical specific consumption of explosives with practice data. Outlined directions of work to reduce friction during explosive blasting in underground and open-cast mining.

Keywords:  explosion energy, mechanical process of destruction, fractured array, elastic-plastic deformation, emission, friction effect, calculation formulas

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