DBPapers
DOI: 10.5593/SGEM2015/B13/S3.035

ESTABLISHING THE STRUCTURE OF VENTILATION NETWORKS AFFECTED BY UNDERGROUND EXPLOSIONS

D. Cioclea, C. Lupu, I. Gherghe, E. Chiuzan, C. Boanta
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-33-9 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 3, 271-278 pp

ABSTRACT
The explosion-type phenomenon is an extremely complex physico-chemical process leading to the physical change of objects and objectives met on the propagation pathway as well as to the chemical change of underground atmosphere in the area of influence. During the development of the explosion-type phenomenon, due to the energy of the dynamic wave, there are generated significant mechanical effects at the level of the affected mining works as well as at the level of ventilation constructions. In addition, due to intense burning reactions at high temperatures, there occur major effects related to the composition and concentration of the underground atmosphere in the area of influence. Changes, respectively perturbations occurring after the event at the level of underground works or coal faces, endanger the entire working staff and may lead to the occurrence of similar phenomena. The occurrence of an explosion has direct effect upon the ventilation network due to the change of operational parameters of main ventilation fans. This leads to a different post-event natural repartition of air flows at branch level. Also, the underground atmosphere in the coal face changes, fact which leads to the increase of the potential risk of a new underground explosion occurrence, respectively to major difficulties regarding the withdrawal of work staff affected and of specialized intervention staff. Prior establishment of post-event work environment is performed through simulations on a ventilation network using the Australian VENTSIM VISUAL ADVANCED software.

Keywords: ventilation, modelling, software, simulation, explosion