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NUMERICAL MODELLING OF THE ACCUMULATION OF NITROGEN OXIDES IN DEAD-END AND MAIN WORKINGS

P. V. Amosov

First published: 2023-10-01https://doi.org/10.5593/sgem2023/1.1/s03.46View metrics

Abstract

The results of numerical simulation of the accumulation of nitrogen oxides in the deadend and main workings during the operation of the mucking and flitting device at the stages of loading and auxiliary operations are presented. The process of accumulation of nitrogen oxides is modeled on the basis of a previously developed two-stage methodological approach: the 1st stage is the calculation of aerodynamic parameters with applying a standard (?? ? ??)-model turbulence and the 2nd stage is the solution of the convective-diffusion equation. Numerical experiments were performed for the ranges of air rate in a main working (6 ? 12 m3/sec), the length of a dead-end working (10 ? 25 m) and air leakage-suction (-0.05 ? +0.05 m3/sec) through the failure zone of a dead-end working with a length of 10 m. The results of the analysis of the accumulation of nitrogen oxides in the dead-end and main workings with variations of these parameters are presented. Significant pollution of the atmosphere of the main working was noted at the minimum length of the dead-end working. Almost linear dependences of concentration and mass rate on the amount of leakage-suction and time are predicted with the accepted values of leakage-suction and air rate. The approach used with minor modifications can be used both for other geometric dimensions of workings, and for various types of initial conditions of gas contamination of dead-end workings during blasting and operation of equipment with internal combustion engines.

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Publication details

Title
NUMERICAL MODELLING OF THE ACCUMULATION OF NITROGEN OXIDES IN DEAD-END AND MAIN WORKINGS
Authors
P. V. Amosov
Proceedings
SGEM International Multidisciplinary Scientific GeoConference- EXPO Proceedings; 23rd International Multidisciplinary Scientific GeoConference Proceedings SGEM2023, Science and Technologies in Geology, Exploration And Mining, Vol 23, Issue 1.1
Publisher
STEF92 Technology
Year
2023
Pages
383-390
SWS Citekey
Amosov20233383390
ISSN
1314-2704
ISBN
978-619-7603-56-9
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
Keywords
mucking and flitting devicenumerical simulation
References3

  1. Kozyrev S.A., Amosov P.V. Substantiation of minimal distance from the excavation face to the ventilation pipes // Labor safety in industry. 2012. Issue 10. pp. 79-83.

  2. Kozyrev S., Amosov P. Numerical modelling of blind excavation ventilation taking into account failure zone // International Multidisciplinary Scientific GeoConference SGEM. 2017. Vol. 17, issue 13. pp. 591-598. DOI: 10.5593/sgem2017/13/s03.075

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  3. Departmental Norms of Process Design 13-2-93 �Technological design standards for mining-metallurgy enterprises applying underground mining� // URL: http://files.stroyinf.ru/Data1/58/58119/ (data accepted: 27.01.2017)

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