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NUMERICAL MODELLING OF BLIND EXCAVATION VENTILATION TAKING INTO ACCOUNT A FAILURE ZONE

Sergei Kozyrev, Pavel Amosov

First published: 2017-06-20https://doi.org/10.5593/sgem2017/13/s03.075View metrics

Abstract

The paper presents numerical modelling results for ventilating a blind excavation, if there is a leakage into a failure zone. The leakage value of air seeping through the failure zone (binomial law of resistance) was estimated by a formula describing in-situ tests results at the Kola Peninsula mines. The blind excavation ventilation process was simulated based on a previously developed two-stage methodical approach: 1st stage пїЅ calculation of aerodynamics with applying a standard ?k ?? ? -turbulence model; 2nd stage пїЅ solution of a convectional-diffusion equation. Numerical experiments on the blind excavation ventilation were carried out for diapasons of air consumption in a main excavation from 6 to 50 m3/sec and a leakage from 0 to 0.07 m3/sec. The forecast result analysis of ventilation time for a blind excavation has allowed obtaining an analytical dependence of ventilation time as a function of air consumption in the main excavation and a leakage. The approved approach with slight modifications can be used as for other geometric dimensions of excavations, so for different types of initial conditions of gas contamination in a blind excavation (blasting operations, exploitation of equipment with IC-engine and etc).

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Publication details

Title
NUMERICAL MODELLING OF BLIND EXCAVATION VENTILATION TAKING INTO ACCOUNT A FAILURE ZONE
Authors
Sergei Kozyrev, Pavel Amosov
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2017
Pages
591-598
SWS Citekey
Kozyrev20173591598
ISSN
1314-2704
ISBN
978-619-7105-00-1
Language
en
Publication type
Conference Paper
Keywords
blind excavationsleakagenumerical modelling
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