Assessing the effectivenes of inertization of brown coal dust with limestone rock dust

Rijad Šišić; Jelena Markovic; Kasim Bajramović

doi:10.5937/podrad1731031M

Rijad Šišić Faculty of Mining, Geology and Civil Engineering Tuzla
Jelena Markovic Faculty of Mining, Geology and Civil Engineering Tuzla
Kasim Bajramović Brown coal mine „Kakanj“ Kakanj

DOI: https://doi.org/10.5937/podrad1731031M

Keywords: Brown coal; Dust; Explosive characteristics; Inert dust;

Abstract

An assessment of the effectiveness of inertization of coal dust with inert dust is an important step in prevention of coal dust explosions. According to the tests on their explosive properties, coal dusts from all the mines in Bosnia and Herzegovina present an explosion hazard. The measure applied in order to prevent the transmission of deposited coal dust explosion, in both methaneous and non-methaneous pits, is wetting. The prescribed content of solid non-combustible particles in coal dust which makes the dust non-explosive (defined by BH regulations) Â is based on the figures taken from Polish regulations. In order to get the content of inert component in coal dust which will prevent the transmission of explosion, relevant for BH coals, a research was conducted on brown coal dusts from the three largest producing coal mines in BH. In this case, limestone rock dust was used to inert coal dust. Tests were conducted in accordance with the methods defined by EN 14034-1 and EN 14034-2. The tests conducted indicate that the content of inert component in BH coal dusts differs from the amounts defined by the adopted Polish regulations and, consequently, that BAS (Bosnian and Herzegovinian) standards need to be changed accordingly.

References

BARTKNECHT W. (1989) Dust Explosions. New York: Springer Verlag.

BAŠIĆ A. et al. (1991) Eksplozivnost mokre ugljene prašine- dileme i pitanja. In: XIV međunarodna konferencija Zaštite u rudarstvu, Donjeck, SSSR. Amsterdam: A.R.Green.

BAJRAMOVIĆ K. (2011) Sadržaj inertne čvrste materije i eksplozivne karakteristike nataložene ugljene prašine starijih miocenskih ležišta, Thesis [PhD]. University of Tuzla Faculty of Mining, Geology and Civil Engineering.

CAIN. P (2003) The use of stone dust to control coal dust explosions: A review of international practice. [Online]. Available from: http://www.ugcoal.ca.

CYBULSKI W.G. (1973) Wybuchy pyłu węglowego i ich zwalczanie. Katowice: Wydawnictwo" Śląsk".

CYBULSKI W.G. (1975) Coal Dust Explosions and Their Suppression. Washington: Bureau of Mines, US Department of the Interior and the National Science Foundation.

CYBULSKI K. (2005) Zagorżenie wybuchem pułu węoraz ocean skuteczności działań profilaktycznych w polskich kopalniash węgla kamiennego. Katowice.

INSTITUT ZA STANDARDIZACIJU BOSNE I HERCEGOVINE (2011) BAS EN 14034-1:2004+A1:2011: Determination of explosion characteristics of dust clouds. Part-1. Determination of the maximum explosion pressure p max of the dust cloud. Sarajevo: Institut za standardizaciju Bosne i Hercegovine.

INSTITUT ZA STANDARDIZACIJU BOSNE I HERCEGOVINE (2011) BAS 14034-2:2011: Determination of explosion characteristics of dust clouds. Part-2. Determination of he maximum rate of explosion pressure rise dp/dt max of the dust clouds. Sarajevo: Institut za standardizaciju Bosne i Hercegovine.

INSTITUT ZA STANDARDIZACIJU BOSNE I HERCEGOVINE (2002) BAS 103:2002: Metode uzimanja uzoraka uglja za određivanje eksplozivnosti prašine. Sarajevo: Institut za standardizaciju Bosne i Hercegovine.

INSTITUT ZA STANDARDIZACIJU BOSNE I HERCEGOVINE (2011) BAS ISO 5068-1: Brown coals and lignites –Determination of moisture content – Part 1: Indirect gravimetric method for total moisture. Sarajevo: Institut za standardizaciju Bosne i Hercegovine.

INSTITUT ZA STANDARDIZACIJU BOSNE I HERCEGOVINE (2010) BAS ISO 1171: Solid mineral fuels – Determination of ash. Sarajevo: Institut za standardizaciju Bosne i Hercegovine.

INSTITUT ZA STANDARDIZACIJU BOSNE I HERCEGOVINE (2013) BAS ISO 5071-1: Brown coals and lignites –Determination of volatile matter in the analysis sample – Part 1: Two-furnace method. Sarajevo: Institut za standardizaciju Bosne i Hercegovine.

JUGOSLOVENSKI STANDARD (1990) JUS B.Z1.065.:Metode određivanja eksplozivnosti ugljene prašine. Beograd.
LEBECKI K.(2004) Zagrożeniapyłowe w górnictwie, Katowice.

MARKOVIĆ J. et al. (2006) Emisije ugljene prašine pri širokočelnom otkopavanju i ocjena opasnosti od eksplozije. In: Monografija Zbornika radova RGGF-a Univerziteta u Tuzli XXXII. Tuzla: University of Tuzla Faculty of Mining, Geology and Civil Engineering, pp.112-114.

MARKOVIĆ J. et al. (2015) Testing of dust explosion characteristics of brown coal at
reduced oxygen content. TTEM, 2, pp.150-155.

NAGY J. (1965) Float Coal Hazard in Mines: A Progress Report. U.S. Department of Interior, Bureau of Mines.
RICHMOND J. et al. (1975) Effect of rock dust on the explosibility of coal dust. U.S. Department of Interior, Bureau of Mines.

SAPKO M. et al. (1987) Explosibility of Float Coal Dust distributed over Coal-Rock Dust Substratum.In: Proceedings of the 22 nd International Conference of Safety in Mines Research Institutes. Beijing, China: Coal Industry Publishing House, pp. 459–468.

SAPKO M. et al. (2007) Coal Dust Particle Size Survey of U.S. Mines. Journal of Loss Prevention in the Process Industries, 20, pp. 616-620.

WEISS E. et al. (1989) Recent results of dust explosion studies at the Lake Lynn experimental mine. In: Proceedings of the 23rd international conference of safety in mines research institutes, U.S. Department of the Interior, Bureau of Mines. Washington: pp. 843-856.