Ishchenko K.S., 2Us S.A., Ishchenko О.K.,2Koba D. V. New methodical approaches to justify selection explosive for destruction of solid rocks

Details
Parent Category: Geo-Technical Mechanics, 2019
Category: Geo-Technical Mechanics, 2019, № 145

Geoteh. meh. 2019, 145, 36-46

https://doi.org/10.1051/e3sconf/201910900032

NEW METHODICAL APPROACHES TO JUSTIFY SELECTION EXPLOSIVE FOR DESTRUCTION OF SOLID ROCKS

1Ishchenko K.S., 2Us S.A., 2Ishchenko О.K., 2Koba D. V.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine,2National Technical Univercity Dnipro Polytechnic

UDC  622.235                                                    

Language: English

Abstract.

The paper formulates relevance, purpose, problem statement, methodology and research results. The article developed a mathematical model to justify selection the type of explosive for destruction of solid rocks. As an alternative, several types of explosives have been selected, namely: that PETN, Grammonit 79/21, Ammonal VA-4 and Anemix 80. The problem is solved using the analytical hierarchy method (AHM). In the process, many criteria, both quantitative and qualitative, were considered, their importance in selecting the type of explosives and their consistency with the opinions of experts. The following indicators were used as criteria: technological, economic, social, environmental by which to evaluate such as the area of the newly formed surface, the size of the average piece, the heat of explosion, but also the economic (the cost of explosives and technology of its use, rational design of the charge of squeezing substances), environmental (the impact of explosives on the natural environment environment) and social (human security in the use of explosives, the complexity of the use of explosives in the destruction of the solid medium). According to the results, priority vectors were obtained for each hierarchy, which contributed to a reasonable approach to selection type of explosives. The established priorities made it possible to carry out a systematic approach to solve the problem, considering not only technological advantages, but also the costs of using various types of explosives. The factors characterizing the costs in the formation of well charges with various types of explosives are also considered. The analysis of results of mathematical modeling showed that PETN has the highest priority, since this substance has a high ability to destroy the solid medium due to the high heat and explosion temperature, but it is also the most costly. Grammonit 79/21 and Ammonal VA-4 have similar priorities. This indicates that they have very similar detonation characteristics and composition of the explosive. Shown the adequacy of chosen model for selection of alternative types of explosives for the destruction of solid rocks of complex structure. At the same time Anemix 80 is by far the most cost-effective and less harmful to the environment because it has the lowest NOx, zero oxygen balance, lowest cost and no additional cost. The use of AHM allows a balanced approach to the selection and justification of the type of explosive, which is very important when designing rational parameters of drilling and blasting operations in the destruction of solid rocks of complex structure in the mines.

Keywords: rock, explosive, analytic hierarchy method.

 

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About the authors

Ishchenko Kostiantyn Stepanovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher in the Department of Rock Explosion Mechanics, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Us Svitlana Albertivna, Candidate of Physics and Mathematics (Ph.D), Professor pf the Department of System Analysis and Management, National Technical Univercity « Dnipro Polytechnic », Dnipro, Ukraine.

Ishchenko Oleksii Kostiantynоvych, Candidate of Technical Sciences (Ph.D.), Associate Professor of the Department of Construction, Geotechnics and Mining Mechanics, National Technical Univercity « Dnipro Polytechnic », Dnipro, Ukraine.

Koba Dmytro Volodymyrovych, Master of Science, Department of System Analysis and Management, National Technical Univercity « Dnipro Polytechnic », Dnipro, Ukraine.