New aspect of drilling development and application in today’s mineral extraction

Abstract

Introduction. The method of applying the factor of short period delay initiation in rock blasting and its effectiveness can be substantiated by the technical possibility of applying it for both conventional inter-row and current downhole delay intervals. The state of the art in blasting has made it possible to implement the technology of a short period delay. So it is rather relevant and extremely difficult to study of the technology’s aspects in full-scale production conditions. Methodology. This work analyzes the options for rock blasting and blasthole charges designs in order to find out how to implement them in a new and more effective way in modern conditions. A well-known method has been chosen, which combines the rock blasting method and the unconventional design of the blasthole charge. It is used as an example to demonstrate the possibility of expanding the practical range of the selected charge placement schemes. This work has been the first to introduce a hypothesis on the possibility of achieving the same effect in two different designs of blasthole charges, but "acting" in almost the same range of short period delay (SPD) use. The fact is that "vertical" distances between downhole short-delay detonators in a conventional blasthole charge (in this case, a single charge) and "horizontal" distances between parallel converged wells of a beam are almost the same. In this regard, it has become possible to focus not on its "internal" content on the "external" one and explain the features of these mechanisms by means of computer simulation. Due to the apparent specific character of conducting a blast in production conditions and intricate experimental observation, this approach is more realizable in practice and the only possible one. 12 "Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal". No. 6. 2020 ISSN 0536-1028 Results. It is proposed to test various methods of blasting (detonation) based on the idea of replacing (transforming, transferring) the explosion action of detonators ( ≥ 1) in a single well charge (conventionally large diameter) with the detonation of ( ≥ 1) lines of a beam of converged borehole charges of the corresponding small diameter. As soon as the number of beam charge design options increases, the range of research options that can lead to the results with improved quality expands significantly. To achieve this goal, the action of various configurations of charges with in-line short period delay blasting in a beam was studied. It should make it possible to come up to some recommendations for blast control. Summary. On the one hand, the proposed blast patterns show the technological departure from the traditional circular shape of the blast wave, on the other hand, they allow using the effect found in the course of numerical experiment for various purposes, in particular, to ensure blasting effect on (interaction with) design features of various mining methods and production systems in complex geomechanical environment