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Wyszukujesz frazę "underground mines" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
CFD simulation of the brattice barrier method for approaching underground mine fires
Autorzy:
Adjiski, V.
Mirakovski, D.
Despodov, Z.
Mijalkovski, S.
Powiązania:
https://bibliotekanauki.pl/articles/972327.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
underground mines
fire scenario
modeling fires
brattice barrier
approaching fires
Opis:
Fires are the most feared hazard in underground mines. The problems associated with under-ground mine fires calls for special techniques and treatments in its prevention and fire fighting. Each mine fire presents unique conditions from the perspective of dealing with it. The purpose of this paper is to present Computational Fluid Dynamics (CFD) simulated fire scenarios on which is tested the brattice barrier method for approaching underground mine fires. With this experimental CFD model we can de-termine the effectiveness of this method. These simulations were performed to determine if we increase the air velocity into the roof with help of brattice barrier, will this remove the smoke and heat upstream of the fire so that firefighters can approach safely and extinguish the fire. We can also observe the explosive range of the particles and gases that travel upstream of the fire and are then forced back into the fire area by this brattice barrier method.
Źródło:
Mining Science; 2016, 23; 161-172
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for determining the Air Change Effectiveness of the auxiliary forcing ventilation system in underground mines using CFD software
Autorzy:
Adjiski, V.
Mirakovski, D.
Despodov, Z.
Mijalkovski, S.
Powiązania:
https://bibliotekanauki.pl/articles/89110.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
underground mines
auxiliary ventilation
development heading
air change effectiveness
mean age of air
Opis:
Auxiliary forcing ventilation system is the most common air distribution system of the development headings in underground mines. This paper reports the development of numerical analysis for calculating the Air Change Effectiveness (ACE) of ventilation performance for auxiliary forcing ventilation system in underground mines. The methodology presented in this paper will be demonstrated through Computational Fluid Dynamics (CFD) modelling and calculated in accordance with ASHRAE F25-1997 methodology. Local age, Mean Age of Air (MAA) and ACE were calculated in three scenarios using CFD modelling to study the ventilation performance. ACE was calculated at locations in the development headings occupied space, based on the MAA from the same ventilation system parameters in three different scenarios. Simulation results indicate that ACE is influenced due to the involvement of objects in the development heading that can reduce the effective volume of the zone. This study provides some new ideas for measuring ACE which can provide better auxiliary ventilation system in underground mines. The proposed methodology could be applied as guidance for design and setup of auxiliary ventilation systems. Results from this CFD modelling will be used for extensive validation study which purpose will be to prove the accuracy of the methodology and, if necessary, to improve it.
Źródło:
Mining Science; 2018, 25; 161-178
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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