№78-5
The effect of emulsion explosiveson atmospheric airin underground iron ore mining
O. Khomenko1, M. Kononenko1, I. Myronova1, A. Kosenko1
1 Dnipro University of Technology, Dnipro, Ukraine
Coll.res.pap.nat.min.univ. 2024, 78:51–63
Full text (PDF)
https://doi.org/10.33271/crpnmu/78.051
ABSTRACT
Purpose. The purpose of the study is to conduct an environmental assessment of the state of the atmospheric air during iron ore mining using TNT-containing and emulsion explosives (EE).
The methodology of research. To determine the features of dispersion in the atmosphere of environmentally hazardous substances at different distances from the air pit of an iron ore mine, an analytical method for calculating the distribution of concentrations of harmful substances formed after blasting operations during underground iron ore mining was used. Using environmental analysis, the level of reduction in environmental hazard when using EE in blasting operations compared to TNT-containing analogues was determined.
Findings. Based on the calculation of the values of ground level concentration of environmentally hazardous substances, it was established that the maximum concentration of carbon monoxide, nitrogen oxide and nitrogen dioxide was observed in 2008, when 100% of TNT-containing explosives (E) were used in underground mining operations. The use of 78% of Ukrainit-type EE and 22% of TNT-containing E from their total costs during 2020, compared to 2008, made it possible to reduce the maximum concentrations of environmentally hazardous substances: carbon monoxide – by 5.0–5.5 times, and nitrogen oxide and dioxide – by 1.2–1.3 times.
The originality. Consists in establishing the dependence of a decrease in ground level concentration of environmentally hazardous substances and a decrease in the environmental hazard index by an average of 1.5 times (up to 36%), when using Ukrainit-type EE in the mines of the Zaporizhzhya Iron Ore Plant Private Joint-Stock Company (ZIOP PJSC) compared to the use of TNT-containing E.
Practical implications. It has been established that the use of Ukrainit type E in underground ore mining leads to a decrease in the concentrations of environmentally hazardous substances such as carbon monoxide, nitrogen oxide and dioxide formed after blasting operations, as well as a decrease in the technogenic load on the atmospheric air.
Keywords: emission source, ground level concentration, environmentally hazardous substances, emulsion explosives, environmental hazard index, environmental assessment.
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