Influence of Applying Additional Forcing Fans for the Air Distribution in Ventilation Network

Open access

Abstract

Mining progress in underground mines cause the ongoing movement of working areas. Consequently, it becomes necessary to adapt the ventilation network of a mine to direct airflow into newly-opened districts. For economic reasons, opening new fields is often achieved via underground workings. Length of primary intake and return routes increases and also increases the total resistance of a complex ventilation network. The development of a subsurface structure can make it necessary to change the air distribution in a ventilation network. Increasing airflow into newly-opened districts is necessary. In mines where extraction does not entail gas-related hazards, there is possibility of implementing a push-pull ventilation system in order to supplement airflows to newly developed mining fields. This is achieved by installing subsurface fan stations with forcing fans at the bottom of downcast shaft. In push-pull systems with multiple main fans, it is vital to select forcing fans with characteristic curves matching those of the existing exhaust fans to prevent undesirable mutual interaction. In complex ventilation networks it is necessary to calculate distribution of airflow (especially in networks with a large number of installed fans). In the article the influence of applying additional forcing fans for the air distribution in ventilation network for underground mine were considered. There are also analysed the extent of overpressure caused by the additional forcing fan in branches of the ventilation network (the operating range of additional forcing fan). Possibilities of increasing airflow rate in working areas were conducted.

[1] W. Budryk. Wentylacja kopalń. Przewietrzanie wyrobisk, część 1, Katowice: Wydawnictwo Górniczo-Hutnicze, 1961.

[2] H. Bystroń. „Zastosowanie schematu potencjalnego do analizy bezpieczeństwa sieci wentylacyjnej”, in Przegląd Górniczy, no. 3, 1971, pp. 127-135.

[3] H. Cross. „Analysis of Flow in Networks of conduits or Conductors”, in Bulletin of Illinois University, Engineering Experiment Station, no. 286, 1936.

[4] M.J. McPherson. Subsurface Ventilation and Environmental Engineering, London: Chapman & Hall, 1993.

[5] J. Pawiński, J. Roszkowski and J. Strzemiński. Przewietrzanie kopalń. Katowice: Wydawnictwo „Śląsk”, 1979.

[6] D.R. Scott and F.B. Hinsley. Ventilation Network Theory. Parts 1 to 5. Colliery Eng. Vol. 28, 1951 in Vol. 29, 1952

[7] N. Szlęzak, J. Liu, M. Borowski and D. Obracaj. „Numeryczne wyznaczanie bocznic przekątnych w kopalnianych sieciach wentylacyjnych”, in Archives of Mining Sciences, no. 4, 1998, pp. 549-561.

[8] N. Szlązak, D. Obracaj and M. Borowski. „Possibilities for taking advantage of main multi-fan station for optimization of ventilation network in the gassy mine”, in AGH Journal of Mining and Geoengineering, vol. 23 (4), 1999, pp. 263-273.

[9] N. Szlązak and L. Kloc. Wpływ ogrzewania powietrza w szybach wdechowych na jego rozpływ w sieci wentylacyjnej kopalni węgla, Kraków: Uczelniane Wydawnictwa Naukowo-Dydaktyczne, 2004.

[10] N. Szlązak and K. Zając. Ocena możliwości wykonania rewersji wentylacji głównej w kopalniach węgla kamiennego, Kraków: Biblioteka Szkoły Eksploatacji Podziemnej, 1998.

Journal Information

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 48 48 8
PDF Downloads 25 25 2