Rational parameters of drilling-and-blasting operations at mine workings construction in the conditions of PJSC “Zaporizskyi iron-ore plant”

Abstract

Purpose. Substantiation and choice of rational parameters of drilling-and-blasting operations for mine workings construction with the use of emulsion ex-plosives. Methods. The tasks were solved by a complex method, which includes the analysis of mining and geological conditions of deposition and development of chambers by means of chamber systems of development with the laying of the produced space, applied technology of drilling and blasting in the course of mining and theoretical studies, which were performed using mathematical methods. Findings. As a result of the calculations, a new technological solution was developed to substantiate and select rational parameters of drilling and blasting operations with the use of emulsion explosives during preparatory workings, which will allow to carry out resource saving in carrying out tunneling works. Originality. A new and effective approach is used to determine the location of holes in the bottom of the production, taking into account the energy characteristics of the explosive and the physical and mechanical properties of the rocks. Practical implications. A technological solution is developed to substantiate and select rational parameters of drilling and blasting operations using emulsion explosives for workings, which will allow to carry out resource saving in the production of mining operations.